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) }In the first example above, the
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) }
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)
}
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 inIn the above code, whenever a non-positiveGeneratorDrivenPropertyChecks
forAll { (n: Int) => whenever (n > 0) { doubleIt(n) should equal (n * 2) } }
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 inFor either kind of property check,Checkers
forAll { (n: Int) => (n > 0) ==> doubleIt(n) == (n * 2) }
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.
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.
if specified value
is less than zero.
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).
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.
if specified value
is less than or equal to 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
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.
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 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.
if specified value
is less than or equal to zero.
Object containing one apply
factory method for each TableFor<n>
class.
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._Because you supplied 2 members in each tuple, the type you'll get back will be a
val examples = Table( ("a", "b"), ( 1, 2), ( 2, 4), ( 4, 8), ( 8, 16), ( 16, 32) )
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
.
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
the property check function to apply to the generated arguments
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) }
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.
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
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
.
the table of data with which to perform the property check
the property check function to apply to each row of data in the table
Implicit PropertyCheckConfig
value providing default configuration values.
Implicit PropertyCheckConfig
value providing default configuration values.
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.
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.
if specified value
is less than zero.
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).
if specified value
is less than zero.
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.
if specified value
is less than or equal to zero.
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._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
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) )
IllegalArgumentException
. You could use whenever
to discard any rows in the fraction
that represent illegal arguments, like this:
import org.scalatest.matchers.ShouldMatchers._In this example, rows 6, 8, and 9 have values that would cause a false to be passed to
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 } }
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.
the boolean condition that determines whether whenever
will evaluate the
fun
function (condition
is true) or throws DiscardedEvaluationException
(condition
is false)
the function to evaluate if the specified condition
is true
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.
if specified value
is less than or equal to zero.
Companion object that facilitates the importing of
PropertyChecks
members as an alternative to mixing it in. One use case is to importPropertyChecks
members so you can use them in the Scala interpreter.