PropertyChecks

Type Members

class ConfiguredPropertyCheck extends AnyRef

Performs a configured property checks by applying property check functions passed to its apply methods to arguments supplied by implicitly passed generators, modifying the values in the PropertyGenConfig object passed implicitly to its apply methods with parameter values passed to its constructor.
Performs a configured property checks by applying property check functions passed to its apply methods to arguments supplied by implicitly passed generators, modifying the values in the PropertyGenConfig object passed implicitly to its apply methods with parameter values passed to its constructor.
Instances of this class are returned by trait GeneratorDrivenPropertyChecks forAll method that accepts a variable length argument list of PropertyCheckConfigParam objects. Thus it is used with functions of all six arities. Here are some examples:
```
forAll (minSize(1), maxSize(10)) { (a: String) =>
  a.length should equal ((a).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String) =>
  a.length + b.length should equal ((a + b).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String) =>
  a.length + b.length + c.length should equal ((a + b + c).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String, d: String) =>
  a.length + b.length + c.length + d.length should equal ((a + b + c + d).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String, d: String, e: String) =>
  a.length + b.length + c.length + d.length + e.length should equal ((a + b + c + d + e).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String, d: String, e: String, f: String) =>
  a.length + b.length + c.length + d.length + e.length + f.length should equal ((a + b + c + d + e + f).length)
}
```
In the first example above, the ConfiguredPropertyCheck object is returned by:
```
forAll (minSize(1), maxSize(10))
```
The code that follows is an invocation of one of the ConfiguredPropertyCheck apply methods:
```
{ (a: String) =>
  a.length should equal ((a).length)
}
```
Definition Classes
GeneratorDrivenPropertyChecks
case class MaxDiscarded(value: Int) extends PropertyCheckConfigParam with Product with Serializable

A PropertyCheckConfigParam that specifies the maximum number of discarded property evaluations allowed during property evaluation.
A PropertyCheckConfigParam that specifies the maximum number of discarded property evaluations allowed during property evaluation.
In GeneratorDrivenPropertyChecks, a property evaluation is discarded if it throws DiscardedEvaluationException, which is produce by whenever clause that evaluates to false. For example, consider this ScalaTest property check:
```
// forAll defined in GeneratorDrivenPropertyChecks
forAll { (n: Int) =>
  whenever (n > 0) {
    doubleIt(n) should equal (n * 2)
  }
}
```
In the above code, whenever a non-positive n is passed, the property function will complete abruptly with DiscardedEvaluationException. Similarly, in Checkers, a property evaluation is discarded if the expression to the left of ScalaCheck's ==> operator is false. Here's an example:
```
// forAll defined in Checkers
forAll { (n: Int) =>
  (n > 0) ==> doubleIt(n) == (n * 2)
}
```
For either kind of property check, MaxDiscarded indicates the maximum number of discarded evaluations that will be allowed. As soon as one past this number of evaluations indicates it needs to be discarded, the property check will fail.
Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than zero.
case class MaxSize(value: Int) extends PropertyCheckConfigParam with Product with Serializable

A PropertyCheckConfigParam that specifies the maximum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
A PropertyCheckConfigParam that specifies the maximum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
Note that the maximum size should be greater than or equal to the minimum size. This requirement is enforced by the PropertyCheckConfig constructor and the forAll methods of traits PropertyChecks and Checkers. In other words, it is enforced at the point both a maximum and minimum size are provided together.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than zero.
case class MinSize(value: Int) extends PropertyCheckConfigParam with Product with Serializable

A PropertyCheckConfigParam that specifies the minimum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
A PropertyCheckConfigParam that specifies the minimum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than zero.
case class MinSuccessful(value: Int) extends PropertyCheckConfigParam with Product with Serializable

A PropertyCheckConfigParam that specifies the minimum number of successful property evaluations required for the property to pass.
A PropertyCheckConfigParam that specifies the minimum number of successful property evaluations required for the property to pass.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than or equal to zero.
case class PropertyCheckConfig(minSuccessful: Int = 100, maxDiscarded: Int = 500, minSize: Int = 0, maxSize: Int = 100, workers: Int = 1) extends Product with Serializable

Configuration object for property checks.
Configuration object for property checks.
The default values for the parameters are:

minSuccessful 100

maxDiscarded 500

minSize 0

maxSize 100

workers 1

minSuccessful
the minimum number of successful property evaluations required for the property to pass.
maxDiscarded
the maximum number of discarded property evaluations allowed during a property check
minSize
the minimum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
maxSize
the maximum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
workers
specifies the number of worker threads to use during property evaluation

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if the specified minSuccessful value is less than or equal to zero, the specified maxDiscarded value is less than zero, the specified minSize value is less than zero, the specified maxSize value is less than zero, the specified minSize is greater than the specified or default value of maxSize, or the specified workers value is less than or equal to zero.
sealed abstract class PropertyCheckConfigParam extends AnyRef

Abstract class defining a family of configuration parameters for property checks.
Abstract class defining a family of configuration parameters for property checks.
The subclasses of this abstract class are used to pass configuration information to the forAll methods of traits PropertyChecks (for ScalaTest-style property checks) and Checkers(for ScalaCheck-style property checks).

Definition Classes
Configuration
case class Workers(value: Int) extends PropertyCheckConfigParam with Product with Serializable

A PropertyCheckConfigParam that specifies the number of worker threads to use when evaluating a property.
A PropertyCheckConfigParam that specifies the number of worker threads to use when evaluating a property.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than or equal to zero.

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any

object Table

Object containing one apply factory method for each TableFor<n> class.

For example, you could create a table of 5 rows and 2 colums like this:

import org.scalatest.prop.Tables._

val examples =
  Table(
    ("a", "b"),
    (  1,   2),
    (  2,   4),
    (  4,   8),
    (  8,  16),
    ( 16,  32)
  )

Because you supplied 2 members in each tuple, the type you'll get back will be a TableFor2. If you wanted a table with just one column you could write this:

val moreExamples =
  Table(
    "powerOfTwo",
         1,
         2,
         4,
         8,
         16
  )

Or if you wanted a table with 10 columns and 10 rows, you could do this:

val multiplicationTable =
  Table(
    ("a", "b", "c", "d", "e", "f", "g", "h", "i", "j"),
    (  1,   2,   3,   4,   5,   6,   7,   8,   9,  10),
    (  2,   4,   6,   8,  10,  12,  14,  16,  18,  20),
    (  3,   6,   9,  12,  15,  18,  21,  24,  27,  30),
    (  4,   8,  12,  16,  20,  24,  28,  32,  36,  40),
    (  5,  10,  15,  20,  25,  30,  35,  40,  45,  50),
    (  6,  12,  18,  24,  30,  36,  42,  48,  54,  60),
    (  7,  14,  21,  28,  35,  42,  49,  56,  63,  70),
    (  8,  16,  24,  32,  40,  48,  56,  64,  72,  80),
    (  9,  18,  27,  36,  45,  54,  63,  72,  81,  90),
    ( 10,  20,  30,  40,  50,  60,  70,  80,  90, 100)
  )

The type of multiplicationTable would be TableFor10. You can pass the resulting tables to a forAll method (defined in trait PropertyChecks), to perform a property check with the data in the table. Or, because tables are sequences of tuples, you can treat them as a Seq.

Definition Classes: Tables

final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def forAll[A, B, C, D, E, F](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), genAndNameC: (Gen[C], String), genAndNameD: (Gen[D], String), genAndNameE: (Gen[E], String), genAndNameF: (Gen[F], String), configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E, F) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D], shrE: Shrink[E], shrF: Shrink[F]): Unit

Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll ((famousLastWords, "a"), (famousLastWords, "b"), (famousLastWords, "c"), (famousLastWords, "d"), (famousLastWords, "e"), (famousLastWords, "f")) { (a: String, b: String, c: String, d: String, e: String, f: String) =>
  a.length + b.length + c.length + d.length + e.length + f.length should equal ((a + b + c + d + e + f).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E, F](genA: Gen[A], genB: Gen[B], genC: Gen[C], genD: Gen[D], genE: Gen[E], genF: Gen[F], configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E, F) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D], shrE: Shrink[E], shrF: Shrink[F]): Unit

Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll (famousLastWords, famousLastWords, famousLastWords, famousLastWords, famousLastWords, famousLastWords) { (a: String, b: String, c: String, d: String, e: String, f: String) =>
  a.length + b.length + c.length + d.length + e.length + f.length should equal ((a + b + c + d + e + f).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E, F](nameA: String, nameB: String, nameC: String, nameD: String, nameE: String, nameF: String, configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E, F) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D], arbE: Arbitrary[E], shrE: Shrink[E], arbF: Arbitrary[F], shrF: Shrink[F]): Unit

Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll ("a", "b", "c", "d", "e", "f") { (a: String, b: String, c: String, d: String, e: String, f: String) =>
  a.length + b.length + c.length + d.length + e.length + f.length should equal ((a + b + c + d + e + f).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E, F](fun: (A, B, C, D, E, F) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D], arbE: Arbitrary[E], shrE: Shrink[E], arbF: Arbitrary[F], shrF: Shrink[F]): Unit

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll { (a: String, b: String, c: String, d: String, e: String, f: String) =>
  a.length + b.length + c.length + d.length + e.length + f.length should equal ((a + b + c + d + e + f).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), genAndNameC: (Gen[C], String), genAndNameD: (Gen[D], String), genAndNameE: (Gen[E], String), configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D], shrE: Shrink[E]): Unit

Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll ((famousLastWords, "a"), (famousLastWords, "b"), (famousLastWords, "c"), (famousLastWords, "d"), (famousLastWords, "e")) { (a: String, b: String, c: String, d: String, e: String) =>
  a.length + b.length + c.length + d.length + e.length should equal ((a + b + c + d + e).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E](genA: Gen[A], genB: Gen[B], genC: Gen[C], genD: Gen[D], genE: Gen[E], configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D], shrE: Shrink[E]): Unit

Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll (famousLastWords, famousLastWords, famousLastWords, famousLastWords, famousLastWords) { (a: String, b: String, c: String, d: String, e: String) =>
  a.length + b.length + c.length + d.length + e.length should equal ((a + b + c + d + e).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E](nameA: String, nameB: String, nameC: String, nameD: String, nameE: String, configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D], arbE: Arbitrary[E], shrE: Shrink[E]): Unit

Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll ("a", "b", "c", "d", "e") { (a: String, b: String, c: String, d: String, e: String) =>
  a.length + b.length + c.length + d.length + e.length should equal ((a + b + c + d + e).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E](fun: (A, B, C, D, E) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D], arbE: Arbitrary[E], shrE: Shrink[E]): Unit

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll { (a: String, b: String, c: String, d: String, e: String) =>
  a.length + b.length + c.length + d.length + e.length should equal ((a + b + c + d + e).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), genAndNameC: (Gen[C], String), genAndNameD: (Gen[D], String), configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D]): Unit

Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll ((famousLastWords, "a"), (famousLastWords, "b"), (famousLastWords, "c"), (famousLastWords, "d")) { (a: String, b: String, c: String, d: String) =>
  a.length + b.length + c.length + d.length should equal ((a + b + c + d).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D](genA: Gen[A], genB: Gen[B], genC: Gen[C], genD: Gen[D], configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D]): Unit

Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll (famousLastWords, famousLastWords, famousLastWords, famousLastWords) { (a: String, b: String, c: String, d: String) =>
  a.length + b.length + c.length + d.length should equal ((a + b + c + d).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D](nameA: String, nameB: String, nameC: String, nameD: String, configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D]): Unit

Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll ("a", "b", "c", "d") { (a: String, b: String, c: String, d: String) =>
  a.length + b.length + c.length + d.length should equal ((a + b + c + d).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D](fun: (A, B, C, D) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D]): Unit

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll { (a: String, b: String, c: String, d: String) =>
  a.length + b.length + c.length + d.length should equal ((a + b + c + d).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), genAndNameC: (Gen[C], String), configParams: PropertyCheckConfigParam*)(fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C]): Unit

Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll ((famousLastWords, "a"), (famousLastWords, "b"), (famousLastWords, "c")) { (a: String, b: String, c: String) =>
  a.length + b.length + c.length should equal ((a + b + c).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C](genA: Gen[A], genB: Gen[B], genC: Gen[C], configParams: PropertyCheckConfigParam*)(fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C]): Unit

Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll (famousLastWords, famousLastWords, famousLastWords) { (a: String, b: String, c: String) =>
  a.length + b.length + c.length should equal ((a + b + c).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C](nameA: String, nameB: String, nameC: String, configParams: PropertyCheckConfigParam*)(fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C]): Unit

Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll ("a", "b", "c") { (a: String, b: String, c: String) =>
  a.length + b.length + c.length should equal ((a + b + c).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C](fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C]): Unit

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll { (a: String, b: String, c: String) =>
  a.length + b.length + c.length should equal ((a + b + c).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), configParams: PropertyCheckConfigParam*)(fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B]): Unit

Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll ((famousLastWords, "a"), (famousLastWords, "b")) { (a: String, b: String) =>
  a.length + b.length should equal ((a + b).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B](genA: Gen[A], genB: Gen[B], configParams: PropertyCheckConfigParam*)(fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B]): Unit

Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll (famousLastWords, famousLastWords) { (a: String, b: String) =>
  a.length + b.length should equal ((a + b).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B](nameA: String, nameB: String, configParams: PropertyCheckConfigParam*)(fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B]): Unit

Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll ("a", "b") { (a: String, b: String) =>
  a.length + b.length should equal ((a + b).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B](fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B]): Unit

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll { (a: String, b: String) =>
  a.length + b.length should equal ((a + b).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A](genAndNameA: (Gen[A], String), configParams: PropertyCheckConfigParam*)(fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A]): Unit

Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to named arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll ((famousLastWords, "a")) { (a: String) =>
  a.length should equal ((a).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A](genA: Gen[A], configParams: PropertyCheckConfigParam*)(fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A]): Unit

Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Performs a property check by applying the specified property check function to arguments supplied by the specified generators.
Here's an example:
```
import org.scalacheck.Gen

// Define your own string generator:
val famousLastWords = for {
  s <- Gen.oneOf("the", "program", "compiles", "therefore", "it", "should", "work")
} yield s

forAll (famousLastWords) { (a: String) =>
  a.length should equal ((a).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A](nameA: String, configParams: PropertyCheckConfigParam*)(fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A]): Unit

Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function with the specified argument names to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll ("a") { (a: String) =>
  a.length should equal ((a).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A](fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A]): Unit

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators.
Here's an example:
```
forAll { (a: String) =>
  a.length should equal ((a).length)
}
```
fun
the property check function to apply to the generated arguments

Definition Classes
GeneratorDrivenPropertyChecks
def forAll(configParams: PropertyCheckConfigParam*): ConfiguredPropertyCheck

Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators, modifying the values in the implicitly passed PropertyGenConfig object with explicitly passed parameter values.
Performs a property check by applying the specified property check function to arguments supplied by implicitly passed generators, modifying the values in the implicitly passed PropertyGenConfig object with explicitly passed parameter values.
This method creates a ConfiguredPropertyCheck object that has six overloaded apply methods that take a function. Thus it is used with functions of all six arities. Here are some examples:
```
forAll (minSize(1), maxSize(10)) { (a: String) =>
  a.length should equal ((a).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String) =>
  a.length + b.length should equal ((a + b).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String) =>
  a.length + b.length + c.length should equal ((a + b + c).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String, d: String) =>
  a.length + b.length + c.length + d.length should equal ((a + b + c + d).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String, d: String, e: String) =>
  a.length + b.length + c.length + d.length + e.length should equal ((a + b + c + d + e).length)
}

forAll (minSize(1), maxSize(10)) { (a: String, b: String, c: String, d: String, e: String, f: String) =>
  a.length + b.length + c.length + d.length + e.length + f.length should equal ((a + b + c + d + e + f).length)
}
```
configParams
a variable length list of PropertyCheckConfigParam objects that should override corresponding values in the PropertyCheckConfig implicitly passed to the apply methods of the ConfiguredPropertyCheck object returned by this method.

Definition Classes
GeneratorDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V](table: TableFor22[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor22.
Performs a property check by applying the specified property check function to each row of the specified TableFor22.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U](table: TableFor21[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor21.
Performs a property check by applying the specified property check function to each row of the specified TableFor21.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T](table: TableFor20[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor20.
Performs a property check by applying the specified property check function to each row of the specified TableFor20.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S](table: TableFor19[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor19.
Performs a property check by applying the specified property check function to each row of the specified TableFor19.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R](table: TableFor18[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor18.
Performs a property check by applying the specified property check function to each row of the specified TableFor18.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q](table: TableFor17[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor17.
Performs a property check by applying the specified property check function to each row of the specified TableFor17.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P](table: TableFor16[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor16.
Performs a property check by applying the specified property check function to each row of the specified TableFor16.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O](table: TableFor15[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor15.
Performs a property check by applying the specified property check function to each row of the specified TableFor15.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N](table: TableFor14[A, B, C, D, E, F, G, H, I, J, K, L, M, N])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor14.
Performs a property check by applying the specified property check function to each row of the specified TableFor14.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M](table: TableFor13[A, B, C, D, E, F, G, H, I, J, K, L, M])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor13.
Performs a property check by applying the specified property check function to each row of the specified TableFor13.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K, L](table: TableFor12[A, B, C, D, E, F, G, H, I, J, K, L])(fun: (A, B, C, D, E, F, G, H, I, J, K, L) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor12.
Performs a property check by applying the specified property check function to each row of the specified TableFor12.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J, K](table: TableFor11[A, B, C, D, E, F, G, H, I, J, K])(fun: (A, B, C, D, E, F, G, H, I, J, K) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor11.
Performs a property check by applying the specified property check function to each row of the specified TableFor11.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I, J](table: TableFor10[A, B, C, D, E, F, G, H, I, J])(fun: (A, B, C, D, E, F, G, H, I, J) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor10.
Performs a property check by applying the specified property check function to each row of the specified TableFor10.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H, I](table: TableFor9[A, B, C, D, E, F, G, H, I])(fun: (A, B, C, D, E, F, G, H, I) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor9.
Performs a property check by applying the specified property check function to each row of the specified TableFor9.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G, H](table: TableFor8[A, B, C, D, E, F, G, H])(fun: (A, B, C, D, E, F, G, H) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor8.
Performs a property check by applying the specified property check function to each row of the specified TableFor8.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F, G](table: TableFor7[A, B, C, D, E, F, G])(fun: (A, B, C, D, E, F, G) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor7.
Performs a property check by applying the specified property check function to each row of the specified TableFor7.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E, F](table: TableFor6[A, B, C, D, E, F])(fun: (A, B, C, D, E, F) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor6.
Performs a property check by applying the specified property check function to each row of the specified TableFor6.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D, E](table: TableFor5[A, B, C, D, E])(fun: (A, B, C, D, E) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor5.
Performs a property check by applying the specified property check function to each row of the specified TableFor5.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C, D](table: TableFor4[A, B, C, D])(fun: (A, B, C, D) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor4.
Performs a property check by applying the specified property check function to each row of the specified TableFor4.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B, C](table: TableFor3[A, B, C])(fun: (A, B, C) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor3.
Performs a property check by applying the specified property check function to each row of the specified TableFor3.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A, B](table: TableFor2[A, B])(fun: (A, B) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor2.
Performs a property check by applying the specified property check function to each row of the specified TableFor2.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
def forAll[A](table: TableFor1[A])(fun: (A) ⇒ Unit): Unit

Performs a property check by applying the specified property check function to each row of the specified TableFor1.
Performs a property check by applying the specified property check function to each row of the specified TableFor1.
table
the table of data with which to perform the property check
fun
the property check function to apply to each row of data in the table

Definition Classes
TableDrivenPropertyChecks
implicit val generatorDrivenConfig: PropertyCheckConfig

Implicit PropertyCheckConfig value providing default configuration values.
Implicit PropertyCheckConfig value providing default configuration values.

Definition Classes
Configuration
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def maxDiscarded(value: Int): MaxDiscarded

Returns a MaxDiscarded property check configuration parameter containing the passed value, which specifies the maximum number of discarded property evaluations allowed during property evaluation.
Returns a MaxDiscarded property check configuration parameter containing the passed value, which specifies the maximum number of discarded property evaluations allowed during property evaluation.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than zero.
def maxSize(value: Int): MaxSize

Returns a MaxSize property check configuration parameter containing the passed value, which specifies the maximum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
Returns a MaxSize property check configuration parameter containing the passed value, which specifies the maximum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
Note that the maximum size should be greater than or equal to the minimum size. This requirement is enforced by the PropertyCheckConfig constructor and the forAll methods of traits PropertyChecks and Checkers. In other words, it is enforced at the point both a maximum and minimum size are provided together.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than zero.
def minSize(value: Int): MinSize

Returns a MinSize property check configuration parameter containing the passed value, which specifies the minimum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
Returns a MinSize property check configuration parameter containing the passed value, which specifies the minimum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than zero.
def minSuccessful(value: Int): MinSuccessful

Returns a MinSuccessful property check configuration parameter containing the passed value, which specifies the minimum number of successful property evaluations required for the property to pass.
Returns a MinSuccessful property check configuration parameter containing the passed value, which specifies the minimum number of successful property evaluations required for the property to pass.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than or equal to zero.
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
def whenever(condition: Boolean)(fun: ⇒ Unit): Unit

Evaluates the passed code block if the passed boolean condition is true, else throws DiscardedEvaluationException.
Evaluates the passed code block if the passed boolean condition is true, else throws DiscardedEvaluationException.
The whenever method can be used inside property check functions to discard invocations of the function with data for which it is known the property would fail. For example, given the following Fraction class:
```
class Fraction(n: Int, d: Int) {

  require(d != 0)
  require(d != Integer.MIN_VALUE)
  require(n != Integer.MIN_VALUE)

  val numer = if (d < 0) -1 * n else n
  val denom = d.abs

  override def toString = numer + " / " + denom
}
```
```
import org.scalatest.prop.TableDrivenPropertyChecks._

val fractions =
  Table(
    ("n", "d"),
    (  1,   2),
    ( -1,   2),
    (  1,  -2),
    ( -1,  -2),
    (  3,   1),
    ( -3,   1),
    ( -3,   0),
    (  3,  -1),
    (  3,  Integer.MIN_VALUE),
    (Integer.MIN_VALUE, 3),
    ( -3,  -1)
  )
```
Imagine you wanted to check a property against this class with data that includes some value that are rejected by the constructor, such as a denominator of zero, which should result in an IllegalArgumentException. You could use whenever to discard any rows in the fraction that represent illegal arguments, like this:
```
import org.scalatest.matchers.ShouldMatchers._

forAll (fractions) { (n: Int, d: Int) =>

  whenever (d != 0 && d != Integer.MIN_VALUE
      && n != Integer.MIN_VALUE) {

    val f = new Fraction(n, d)

    if (n < 0 && d < 0 || n > 0 && d > 0)
      f.numer should be > 0
    else if (n != 0)
      f.numer should be < 0
    else
      f.numer should be === 0

    f.denom should be > 0
  }
}
```
In this example, rows 6, 8, and 9 have values that would cause a false to be passed to whenever. (For example, in row 6, d is 0, which means d != 0 will be false.) For those rows, whenever will throw DiscardedEvaluationException, which will cause the forAll method to discard that row.
condition
the boolean condition that determines whether whenever will evaluate the fun function (condition is true) or throws DiscardedEvaluationException (condition is false)
fun
the function to evaluate if the specified condition is true

Definition Classes
Whenever
def workers(value: Int): Workers

Returns a Workers property check configuration parameter containing the passed value, which specifies the number of worker threads to use when evaluating a property.
Returns a Workers property check configuration parameter containing the passed value, which specifies the number of worker threads to use when evaluating a property.

Definition Classes
Configuration
Exceptions thrown
IllegalArgumentException
if specified value is less than or equal to zero.

minSuccessful	100
maxDiscarded	500
minSize	0
maxSize	100
workers	1

object PropertyChecks extends PropertyChecks

Type Members

class ConfiguredPropertyCheck extends AnyRef

case class MaxDiscarded(value: Int) extends PropertyCheckConfigParam with Product with Serializable

case class MaxSize(value: Int) extends PropertyCheckConfigParam with Product with Serializable

case class MinSize(value: Int) extends PropertyCheckConfigParam with Product with Serializable

case class MinSuccessful(value: Int) extends PropertyCheckConfigParam with Product with Serializable

case class PropertyCheckConfig(minSuccessful: Int = 100, maxDiscarded: Int = 500, minSize: Int = 0, maxSize: Int = 100, workers: Int = 1) extends Product with Serializable

sealed abstract class PropertyCheckConfigParam extends AnyRef

case class Workers(value: Int) extends PropertyCheckConfigParam with Product with Serializable

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: Any): Boolean

object Table

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def forAll[A, B, C, D, E](genA: Gen[A], genB: Gen[B], genC: Gen[C], genD: Gen[D], genE: Gen[E], configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D, E) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D], shrE: Shrink[E]): Unit

def forAll[A, B, C, D, E](fun: (A, B, C, D, E) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D], arbE: Arbitrary[E], shrE: Shrink[E]): Unit

def forAll[A, B, C, D](genA: Gen[A], genB: Gen[B], genC: Gen[C], genD: Gen[D], configParams: PropertyCheckConfigParam*)(fun: (A, B, C, D) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C], shrD: Shrink[D]): Unit

def forAll[A, B, C, D](fun: (A, B, C, D) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C], arbD: Arbitrary[D], shrD: Shrink[D]): Unit

def forAll[A, B, C](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), genAndNameC: (Gen[C], String), configParams: PropertyCheckConfigParam*)(fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C]): Unit

def forAll[A, B, C](genA: Gen[A], genB: Gen[B], genC: Gen[C], configParams: PropertyCheckConfigParam*)(fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B], shrC: Shrink[C]): Unit

def forAll[A, B, C](nameA: String, nameB: String, nameC: String, configParams: PropertyCheckConfigParam*)(fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C]): Unit

def forAll[A, B, C](fun: (A, B, C) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B], arbC: Arbitrary[C], shrC: Shrink[C]): Unit

def forAll[A, B](genAndNameA: (Gen[A], String), genAndNameB: (Gen[B], String), configParams: PropertyCheckConfigParam*)(fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B]): Unit

def forAll[A, B](genA: Gen[A], genB: Gen[B], configParams: PropertyCheckConfigParam*)(fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A], shrB: Shrink[B]): Unit

def forAll[A, B](nameA: String, nameB: String, configParams: PropertyCheckConfigParam*)(fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B]): Unit

def forAll[A, B](fun: (A, B) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A], arbB: Arbitrary[B], shrB: Shrink[B]): Unit

def forAll[A](genAndNameA: (Gen[A], String), configParams: PropertyCheckConfigParam*)(fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A]): Unit

def forAll[A](genA: Gen[A], configParams: PropertyCheckConfigParam*)(fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, shrA: Shrink[A]): Unit

def forAll[A](nameA: String, configParams: PropertyCheckConfigParam*)(fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A]): Unit

def forAll[A](fun: (A) ⇒ Unit)(implicit config: PropertyCheckConfig, arbA: Arbitrary[A], shrA: Shrink[A]): Unit

def forAll(configParams: PropertyCheckConfigParam*): ConfiguredPropertyCheck

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V](table: TableFor22[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U](table: TableFor21[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T](table: TableFor20[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S](table: TableFor19[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R](table: TableFor18[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q](table: TableFor17[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P](table: TableFor16[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O](table: TableFor15[A, B, C, D, E, F, G, H, I, J, K, L, M, N, O])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N, O) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M, N](table: TableFor14[A, B, C, D, E, F, G, H, I, J, K, L, M, N])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M, N) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L, M](table: TableFor13[A, B, C, D, E, F, G, H, I, J, K, L, M])(fun: (A, B, C, D, E, F, G, H, I, J, K, L, M) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K, L](table: TableFor12[A, B, C, D, E, F, G, H, I, J, K, L])(fun: (A, B, C, D, E, F, G, H, I, J, K, L) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J, K](table: TableFor11[A, B, C, D, E, F, G, H, I, J, K])(fun: (A, B, C, D, E, F, G, H, I, J, K) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I, J](table: TableFor10[A, B, C, D, E, F, G, H, I, J])(fun: (A, B, C, D, E, F, G, H, I, J) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H, I](table: TableFor9[A, B, C, D, E, F, G, H, I])(fun: (A, B, C, D, E, F, G, H, I) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G, H](table: TableFor8[A, B, C, D, E, F, G, H])(fun: (A, B, C, D, E, F, G, H) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F, G](table: TableFor7[A, B, C, D, E, F, G])(fun: (A, B, C, D, E, F, G) ⇒ Unit): Unit

def forAll[A, B, C, D, E, F](table: TableFor6[A, B, C, D, E, F])(fun: (A, B, C, D, E, F) ⇒ Unit): Unit

def forAll[A, B, C, D, E](table: TableFor5[A, B, C, D, E])(fun: (A, B, C, D, E) ⇒ Unit): Unit

def forAll[A, B, C, D](table: TableFor4[A, B, C, D])(fun: (A, B, C, D) ⇒ Unit): Unit

def forAll[A, B, C](table: TableFor3[A, B, C])(fun: (A, B, C) ⇒ Unit): Unit

def forAll[A, B](table: TableFor2[A, B])(fun: (A, B) ⇒ Unit): Unit

def forAll[A](table: TableFor1[A])(fun: (A) ⇒ Unit): Unit

implicit val generatorDrivenConfig: PropertyCheckConfig

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

def maxDiscarded(value: Int): MaxDiscarded

def maxSize(value: Int): MaxSize

def minSize(value: Int): MinSize

def minSuccessful(value: Int): MinSuccessful

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

def whenever(condition: Boolean)(fun: ⇒ Unit): Unit

def workers(value: Int): Workers

Inherited from PropertyChecks

Inherited from GeneratorDrivenPropertyChecks