Scalactic 3.3.0-alpha.1
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Scalactic 3.3.0-alpha.1/org.scalactic/TypeCheckedTripleEquals

TypeCheckedTripleEquals

org.scalactic.TypeCheckedTripleEquals
See theTypeCheckedTripleEquals companion trait
object TypeCheckedTripleEquals extends TypeCheckedTripleEquals

Companion object to trait TypeCheckedTripleEquals that facilitates the importing of TypeCheckedTripleEquals members as an alternative to mixing it in. One use case is to import TypeCheckedTripleEquals members so you can use them in the Scala interpreter:

$ scala -classpath scalatest.jar
Welcome to Scala 2.13.6 (OpenJDK 64-Bit Server VM, Java yyy).
Type in expressions for evaluation. Or try :help.

scala> import org.scalactic._
import org.scalactic._

scala> import TypeCheckedTripleEquals._
import TypeCheckedTripleEquals._

scala> 1 + 1 === 2
res0: Boolean = true

Attributes

Companion
trait
Source
TypeCheckedTripleEquals.scala
Graph
Supertypes
class Object
trait Matchable
class Any
Show all
Self type

Members list

Type members

Inherited classlikes

class CheckingEqualizer[L](val leftSide: L)

Class used via an implicit conversion to enable two objects to be compared with === and !== with a Boolean result and an enforced type constraint between two object types. For example:

Class used via an implicit conversion to enable two objects to be compared with === and !== with a Boolean result and an enforced type constraint between two object types. For example:

assert(a === b)
assert(c !== d)

You can also check numeric values against another with a tolerance. Here are some examples:

assert(a === (2.0 +- 0.1))
assert(c !== (2.0 +- 0.1))

Value parameters

leftSide

An object to convert to Equalizer, which represents the value on the left side of a === or !== invocation.

Attributes

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
Supertypes
class Object
trait Matchable
class Any
class Equalizer[L](val leftSide: L)

Class used via an implicit conversion to enable any two objects to be compared with === and !== with a Boolean result and no enforced type constraint between two object types. For example:

Class used via an implicit conversion to enable any two objects to be compared with === and !== with a Boolean result and no enforced type constraint between two object types. For example:

assert(a === b)
assert(c !== d)

You can also check numeric values against another with a tolerance. Here are some examples:

assert(a === (2.0 +- 0.1))
assert(c !== (2.0 +- 0.1))

Value parameters

leftSide

An object to convert to Equalizer, which represents the value on the left side of a === or !== invocation.

Attributes

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
Supertypes
class Object
trait Matchable
class Any

Value members

Inherited methods

def !==[T](right: Spread[T]): TripleEqualsInvocationOnSpread[T]

Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate the “<left> should !== (<pivot> +- <tolerance>)” syntax of Matchers.

Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate the “<left> should !== (<pivot> +- <tolerance>)” syntax of Matchers.

Value parameters

right

the Spread[T] against which to compare the left-hand value

Attributes

Returns

a TripleEqualsInvocationOnSpread wrapping the passed Spread[T] value, with expectingEqual set to false.

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
def !==(right: Null): TripleEqualsInvocation[Null]

Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should !== null” syntax of Matchers.

Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should !== null” syntax of Matchers.

Value parameters

right

a null reference

Attributes

Returns

a TripleEqualsInvocation wrapping the passed null value, with expectingEqual set to false.

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
def !==[T](right: T): TripleEqualsInvocation[T]

Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should !== <right>” syntax of Matchers.

Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should !== <right>” syntax of Matchers.

Value parameters

right

the right-hand side value for an equality assertion

Attributes

Returns

a TripleEqualsInvocation wrapping the passed right value, with expectingEqual set to false.

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
def ===[T](right: Spread[T]): TripleEqualsInvocationOnSpread[T]

Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate the “<left> should === (<pivot> +- <tolerance>)” syntax of Matchers.

Returns a TripleEqualsInvocationOnSpread[T], given an Spread[T], to facilitate the “<left> should === (<pivot> +- <tolerance>)” syntax of Matchers.

Value parameters

right

the Spread[T] against which to compare the left-hand value

Attributes

Returns

a TripleEqualsInvocationOnSpread wrapping the passed Spread[T] value, with expectingEqual set to true.

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
def ===(right: Null): TripleEqualsInvocation[Null]

Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should === null” syntax of Matchers.

Returns a TripleEqualsInvocation[Null], given a null reference, to facilitate the “<left> should === null” syntax of Matchers.

Value parameters

right

a null reference

Attributes

Returns

a TripleEqualsInvocation wrapping the passed null value, with expectingEqual set to true.

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
def ===[T](right: T): TripleEqualsInvocation[T]

Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should === <right>” syntax of Matchers.

Returns a TripleEqualsInvocation[T], given an object of type T, to facilitate the “<left> should === <right>” syntax of Matchers.

Value parameters

right

the right-hand side value for an equality assertion

Attributes

Returns

a TripleEqualsInvocation wrapping the passed right value, with expectingEqual set to true.

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
override def convertToEqualizer[T](left: T): Equalizer[T]

Converts to an Equalizer that provides === and !== operators that result in Boolean and enforce no type constraint.

Converts to an Equalizer that provides === and !== operators that result in Boolean and enforce no type constraint.

This method is overridden and made implicit by subtrait TripleEquals and overriden as non-implicit by the other subtraits in this package.

Value parameters

left

the object whose type to convert to Equalizer.

Attributes

Throws
NullPointerException

if left is null.

Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
def defaultEquality[A]: Equality[A]

Returns an Equality[A] for any type A that determines equality by first calling .deep on any Array (on either the left or right side), then comparing the resulting objects with ==.

Returns an Equality[A] for any type A that determines equality by first calling .deep on any Array (on either the left or right side), then comparing the resulting objects with ==.

Attributes

Returns

a default Equality for type A

Inherited from:
TripleEqualsSupport
Source
TripleEqualsSupport.scala
override def unconstrainedEquality[A, B](implicit equalityOfA: Equality[A]): CanEqual[A, B]

Provides an A CanEqual B instance for any two types A and B, with no type constraint enforced, given an implicit Equality[A].

Provides an A CanEqual B instance for any two types A and B, with no type constraint enforced, given an implicit Equality[A].

The returned Constraint's areEqual method uses the implicitly passed Equality[A]'s areEqual method to determine equality.

This method is overridden and made implicit by subtraits TripleEquals and overriden as non-implicit by the other subtraits in this package.

Value parameters

equalityOfA

an Equality[A] type class to which the Constraint.areEqual method will delegate to determine equality.

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEqual method of the passed Equality[A].

Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala

Deprecated and Inherited methods

override def conversionCheckedConstraint[A, B](implicit equivalenceOfA: Equivalence[A], cnv: B => A): CanEqual[A, B]

The conversionCheckedConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

The conversionCheckedConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that B is implicitly convertible to A, given an implicit Equivalence[A].

The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits ConversionCheckedTripleEquals) and overriden as non-implicit by the other subtraits in this package.

Value parameters

cnv

an implicit conversion from B to A

equivalenceOfA

an Equivalence[A] type class to which the Constraint.areEqual method will delegate to determine equality.

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[A].

Deprecated
true
Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
override def convertEquivalenceToAToBConversionConstraint[A, B](equivalenceOfB: Equivalence[B])(implicit ev: A => B): CanEqual[A, B]

The convertEquivalenceToAToBConversionConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

The convertEquivalenceToAToBConversionConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that A is implicitly convertible to B, given an explicit Equivalence[B].

This method is used to enable the Explicitly DSL for ConversionCheckedTripleEquals by requiring an explicit Equivalance[B], but taking an implicit function that converts from A to B.

The returned Constraint's areEqual method uses the implicitly passed Equivalence[B]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits LowPriorityConversionCheckedConstraint (extended by ConversionCheckedTripleEquals), and overriden as non-implicit by the other subtraits in this package.

Value parameters

cnv

an implicit conversion from A to B

equalityOfB

an Equivalence[B] type class to which the Constraint.areEqual method will delegate to determine equality.

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[B].

Deprecated
true
Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
override def convertEquivalenceToBToAConversionConstraint[A, B](equivalenceOfA: Equivalence[A])(implicit ev: B => A): CanEqual[A, B]

The convertEquivalenceToBToAConversionConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

The convertEquivalenceToBToAConversionConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that B is implicitly convertible to A, given an explicit Equivalence[A].

This method is used to enable the Explicitly DSL for ConversionCheckedTripleEquals by requiring an explicit Equivalance[A], but taking an implicit function that converts from B to A. For example, under ConversionCheckedTripleEquals, this method (as an implicit method), would be used to compile this statement:

def closeEnoughTo1(num: Double): Boolean =
 (num === 1.0)(decided by forgivingEquality)

The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits ConversionCheckedTripleEquals) and overriden as non-implicit by the other subtraits in this package.

Value parameters

cnv

an implicit conversion from B to A

equivalenceOfA

an Equivalence[A] type class to which the Constraint.areEqual method will delegate to determine equality.

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[A].

Deprecated
true
Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
override def lowPriorityConversionCheckedConstraint[A, B](implicit equivalenceOfB: Equivalence[B], cnv: A => B): CanEqual[A, B]

The lowPriorityConversionCheckedConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

The lowPriorityConversionCheckedConstraint method has been deprecated and will be removed in a future version of Scalactic. It is no longer needed now that the deprecation period of ConversionCheckedTripleEquals has expired. It will not be replaced.

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that A is implicitly convertible to B, given an implicit Equivalence[B].

The returned Constraint's areEqual method uses the implicitly passed Equivalence[B]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits LowPriorityConversionCheckedConstraint (extended by ConversionCheckedTripleEquals), and overriden as non-implicit by the other subtraits in this package.

Value parameters

cnv

an implicit conversion from A to B

equalityOfB

an Equivalence[B] type class to which the Constraint.areEqual method will delegate to determine equality.

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[B].

Deprecated
true
Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala

Implicits

Inherited implicits

implicit override def convertEquivalenceToAToBConstraint[A, B](equivalenceOfB: Equivalence[B])(implicit ev: A <:< B): CanEqual[A, B]

Provides a A CanEqual B for any two types A and B, enforcing the type constraint that A must be a subtype of B, given an explicit Equivalence[B].

Provides a A CanEqual B for any two types A and B, enforcing the type constraint that A must be a subtype of B, given an explicit Equivalence[B].

This method is used to enable the Explicitly DSL for TypeCheckedTripleEquals by requiring an explicit Equivalance[B], but taking an implicit function that provides evidence that A is a subtype of B.

The returned Constraint's areEqual method uses the implicitly passed Equivalence[B]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits LowPriorityTypeCheckedConstraint (extended by TypeCheckedTripleEquals), and overriden as non-implicit by the other subtraits in this package.

Value parameters

equivalenceOfB

an Equivalence[B] type class to which the Constraint.areEqual method will delegate to determine equality.

ev

evidence that A is a subype of B

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[B].

Definition Classes
Inherited from:
LowPriorityTypeCheckedConstraint
Source
LowPriorityTypeCheckedConstraint.scala
implicit override def convertEquivalenceToBToAConstraint[A, B](equivalenceOfA: Equivalence[A])(implicit ev: B <:< A): CanEqual[A, B]

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that B must be a subtype of A, given an explicit Equivalence[A].

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that B must be a subtype of A, given an explicit Equivalence[A].

This method is used to enable the Explicitly DSL for TypeCheckedTripleEquals by requiring an explicit Equivalance[B], but taking an implicit function that provides evidence that A is a subtype of B. For example, under TypeCheckedTripleEquals, this method (as an implicit method), would be used to compile this statement:

def closeEnoughTo1(num: Double): Boolean =
 (num === 1.0)(decided by forgivingEquality)

The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits TypeCheckedTripleEquals) and overriden as non-implicit by the other subtraits in this package.

Value parameters

equalityOfA

an Equivalence[A] type class to which the Constraint.areEqual method will delegate to determine equality.

ev

evidence that B is a subype of A

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[A].

Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
implicit override def convertToCheckingEqualizer[T](left: T): CheckingEqualizer[T]

Converts to an CheckingEqualizer that provides === and !== operators that result in Boolean and enforce a type constraint.

Converts to an CheckingEqualizer that provides === and !== operators that result in Boolean and enforce a type constraint.

This method is overridden and made implicit by subtrait TypeCheckedTripleEquals, and overriden as non-implicit by the other subtraits in this package.

Value parameters

left

the object whose type to convert to CheckingEqualizer.

Attributes

Throws
NullPointerException

if left is null.

Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
implicit override def lowPriorityTypeCheckedConstraint[A, B](implicit equivalenceOfB: Equivalence[B], ev: A <:< B): CanEqual[A, B]

Provides an A CanEqual B for any two types A and B, enforcing the type constraint that A must be a subtype of B, given an implicit Equivalence[B].

Provides an A CanEqual B for any two types A and B, enforcing the type constraint that A must be a subtype of B, given an implicit Equivalence[B].

The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits LowPriorityTypeCheckedConstraint (extended by TypeCheckedTripleEquals), and overriden as non-implicit by the other subtraits in this package.

Value parameters

equivalenceOfB

an Equivalence[B] type class to which the Constraint.areEqual method will delegate to determine equality.

ev

evidence that A is a subype of B

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[B].

Definition Classes
Inherited from:
LowPriorityTypeCheckedConstraint
Source
LowPriorityTypeCheckedConstraint.scala
implicit override def typeCheckedConstraint[A, B](implicit equivalenceOfA: Equivalence[A], ev: B <:< A): CanEqual[A, B]

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that B must be a subtype of A, given an implicit Equivalence[A].

Provides an A CanEqual B instance for any two types A and B, enforcing the type constraint that B must be a subtype of A, given an implicit Equivalence[A].

The returned Constraint's areEqual method uses the implicitly passed Equivalence[A]'s areEquivalent method to determine equality.

This method is overridden and made implicit by subtraits TypeCheckedTripleEquals) and overriden as non-implicit by the other subtraits in this package.

Value parameters

equalityOfA

an Equivalence[A] type class to which the Constraint.areEqual method will delegate to determine equality.

ev

evidence that B is a subype of A

Attributes

Returns

an A CanEqual B instance whose areEqual method delegates to the areEquivalent method of the passed Equivalence[A].

Definition Classes
Inherited from:
TypeCheckedTripleEquals
Source
TypeCheckedTripleEquals.scala
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