Checkers
Related Docs:
trait Checkers
| package prop
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).
IllegalArgumentException if specified value is less than zero.
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.
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).
A PropertyCheckConfigParam that (with minSize) 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 (with minSize) 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 size range is added to minSize in order to calculate the maximum size passed to ScalaCheck. Using a range allows compile-time checking of a non-negative number being specified.
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.
IllegalArgumentException if specified value is less than or equal to zero.
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.
IllegalArgumentException if specified value is less than zero.
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.
use SizeRange instead
IllegalArgumentException if specified value is less than zero.
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 |
the minimum number of successful property evaluations required for the property to pass.
the maximum number of discarded property evaluations allowed during a property check
the minimum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
the maximum size parameter to provide to ScalaCheck, which it will use when generating objects for which size matters (such as strings or lists).
specifies the number of worker threads to use during property evaluation
Use PropertyCheckConfiguration instead
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.
Use PropertyCheckConfiguration directly instead.
Implicitly converts PropertyCheckConfigs to PropertyCheckConfiguration,
which enables a smoother upgrade path.
Implicitly converts PropertyCheckConfigs to PropertyCheckConfiguration,
which enables a smoother upgrade path.
Check a property.
Check a property.
the property to check
TestFailedException if a test case is discovered for which the property doesn't hold.
Check a property with the given testing parameters.
Check a property with the given testing parameters.
the property to check
the test parameters
TestFailedException if a test case is discovered for which the property doesn't hold.
Convert the passed 6-arg function into a property, and check it.
Convert the passed 6-arg function into a property, and check it.
the function to be converted into a property and checked
TestFailedException if a test case is discovered for which the property doesn't hold.
Convert the passed 5-arg function into a property, and check it.
Convert the passed 5-arg function into a property, and check it.
the function to be converted into a property and checked
TestFailedException if a test case is discovered for which the property doesn't hold.
Convert the passed 4-arg function into a property, and check it.
Convert the passed 4-arg function into a property, and check it.
the function to be converted into a property and checked
TestFailedException if a test case is discovered for which the property doesn't hold.
Convert the passed 3-arg function into a property, and check it.
Convert the passed 3-arg function into a property, and check it.
the function to be converted into a property and checked
TestFailedException if a test case is discovered for which the property doesn't hold.
Convert the passed 2-arg function into a property, and check it.
Convert the passed 2-arg function into a property, and check it.
the function to be converted into a property and checked
TestFailedException if a test case is discovered for which the property doesn't hold.
Convert the passed 1-arg function into a property, and check it.
Convert the passed 1-arg function into a property, and check it.
the function to be converted into a property and checked
TestFailedException if a test case is discovered for which the property doesn't hold.
Implicit PropertyCheckConfig value providing default configuration values.
Implicit PropertyCheckConfig value providing default configuration values.
Returns a MaxDiscardedFactor property check configuration parameter containing the passed value, which specifies the factor of discarded
property evaluations allowed during property evaluation.
Returns a MaxDiscardedFactor property check configuration parameter containing the passed value, which specifies the factor of discarded
property evaluations allowed during property evaluation.
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).
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.
Returns a SizeRange property check configuration parameter containing the passed value, that (with minSize) 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 SizeRange property check configuration parameter containing the passed value, that (with minSize) 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 size range is added to minSize in order to calculate the maximum size passed to ScalaCheck. Using a range allows compile-time checking of a non-negative number being specified.
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.
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.
use maxDiscardedFactor instead
IllegalArgumentException if specified value is less than zero.
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.
use SizeRange instead
IllegalArgumentException if specified value is less than zero.
Companion object that facilitates the importing of
Checkersmembers as an alternative to mixing it in. One use case is to importCheckersmembers so you can use them in the Scala interpreter.