Collecting

Supertrait for typeclasses that enable loneElement matcher syntax for collections.

A Collecting[E, C] provides access to the "collecting nature" of type C in such a way that loneElement syntax can be used with type C. A C can be any type of "collecting", a type that in some way collects or brings together elements of type E. ScalaTest provides implicit implementations for several types. You can enable the contain matcher syntax on your own type U by defining an Collecting[U, E] for the type and making it available implicitly.

ScalaTest provides implicit Collecting instances for scala.collection.GenTraversable, Array, java.util.Collection and java.util.Map in the Collecting companion object.

Linear Supertypes

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Abstract Value Members

abstract def loneElementOf(collection: C): Option[E]

Implements the loneElement syntax of trait LoneElement.
Implements the loneElement syntax of trait LoneElement.
Returns the lone element contained in a collection, wrapped in a Some, or None if the collection contains either no elements or more than one element.
collection
a collection about which an assertion is being made
returns
Some[E] if the collection contains one and only one element, None otherwise.
abstract def sizeOf(collection: C): Int

Returns the size of the passed collection.
Returns the size of the passed collection.
collection
a collection to check the size of
returns
the size of the passed collection

Concrete Value Members

final def !=(arg0: AnyRef): Boolean

Definition Classes
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final def !=(arg0: Any): Boolean

Definition Classes
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final def ##(): Int

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

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final def ==(arg0: Any): Boolean

Definition Classes
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final def asInstanceOf[T0]: T0

Definition Classes
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def clone(): AnyRef

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

Definition Classes
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def equals(arg0: Any): Boolean

Definition Classes
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def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
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Annotations
@throws()
final def getClass(): Class[_]

Definition Classes
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def hashCode(): Int

Definition Classes
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final def isInstanceOf[T0]: Boolean

Definition Classes
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final def ne(arg0: AnyRef): Boolean

Definition Classes
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final def notify(): Unit

Definition Classes
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final def notifyAll(): Unit

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

Definition Classes
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def toString(): String

Definition Classes
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final def wait(): Unit

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

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

Definition Classes
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Annotations
@throws()

trait Collecting[E, C] extends AnyRef

Abstract Value Members

abstract def loneElementOf(collection: C): Option[E]

abstract def sizeOf(collection: C): Int

Concrete Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

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

Inherited from AnyRef

Inherited from Any

Ungrouped