trait Collecting[E, C] extends AnyRef
Supertrait for typeclasses that enable loneElement
and inspectors 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[E, U]
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.
- Source
- Collecting.scala
- Alphabetic
- By Inheritance
- Collecting
- AnyRef
- Any
- Hide All
- Show All
- Public
- Protected
Abstract Value Members
- abstract def genTraversableFrom(collection: C): GenTraversable[E]
Returns a
GenTraversable[E]
containing the same elements (in the same order, if the original collection had a defined order), as the passedcollection
.Returns a
GenTraversable[E]
containing the same elements (in the same order, if the original collection had a defined order), as the passedcollection
.- collection
a
collection
to check the size of- returns
a
GenTraversable[E]
containing the same elements as the passedcollection
- abstract def loneElementOf(collection: C): Option[E]
Implements the
loneElement
syntax of traitLoneElement
.Implements the
loneElement
syntax of traitLoneElement
.Returns the lone element contained in a collection, wrapped in a
Some
, orNone
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: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def ##: Int
- Definition Classes
- AnyRef → Any
- final def ==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- def clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.CloneNotSupportedException]) @native()
- final def eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- def equals(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef → Any
- def finalize(): Unit
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable])
- final def getClass(): Class[_ <: AnyRef]
- Definition Classes
- AnyRef → Any
- Annotations
- @native()
- def hashCode(): Int
- Definition Classes
- AnyRef → Any
- Annotations
- @native()
- final def isInstanceOf[T0]: Boolean
- Definition Classes
- Any
- final def ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
- final def notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native()
- final def notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native()
- 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(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException]) @native()