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trait Aggregating[-A] extends AnyRef

Typeclass that enables for aggregations certain contain syntax in the ScalaTest matchers DSL.

An Aggregating[A] provides access to the "aggregating nature" of type A in such a way that relevant contain matcher syntax can be used with type A. An A can be any type of aggregation—an object that in some way aggregates or brings together other objects. ScalaTest provides implicit implementations for several types out of the box in the Aggregating companion object:

  • scala.collection.GenTraversable
  • String
  • Array
  • java.util.Collection
  • java.util.Map

The contain syntax enabled by this trait is:

  • result should contain atLeastOneOf (1, 2, 3)
  • result should contain atMostOneOf (1, 2, 3)
  • result should contain only (1, 2, 3)
  • result should contain allOf (1, 2, 3)
  • result should contain theSameElementsAs (List(1, 2, 3))

You can enable the contain matcher syntax enabled by Aggregating on your own type U by defining an Aggregating[U] for the type and making it available implicitly.

Note, for an explanation of the difference between Containing and Aggregating, both of which enable contain matcher syntax, see the Containing versus Aggregating section of the main documentation for trait Containing.

Source
Aggregating.scala
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Abstract Value Members

  1. abstract def containsAllOf(aggregation: A, eles: Seq[Any]): Boolean

    Implements contain allOf syntax for aggregations of type A.

    Implements contain allOf syntax for aggregations of type A.

    aggregation

    an aggregation about which an assertion is being made

    eles

    elements all of which should be contained in the passed aggregation

    returns

    true if the passed aggregation contains all of the passed elements

  2. abstract def containsAtLeastOneOf(aggregation: A, eles: Seq[Any]): Boolean

    Implements contain atLeastOneOf syntax for aggregations of type A.

    Implements contain atLeastOneOf syntax for aggregations of type A.

    aggregation

    an aggregation about which an assertion is being made

    eles

    elements at least one of which should be contained in the passed aggregation

    returns

    true if the passed aggregation contains at least one of the passed elements

  3. abstract def containsAtMostOneOf(aggregation: A, eles: Seq[Any]): Boolean

    Implements contain atMostOneOf syntax for aggregations of type A.

    Implements contain atMostOneOf syntax for aggregations of type A.

    aggregation

    an aggregation about which an assertion is being made

    eles

    elements at most one of which should be contained in the passed aggregation

    returns

    true if the passed aggregation contains at most one of the passed elements

  4. abstract def containsOnly(aggregation: A, eles: Seq[Any]): Boolean

    Implements contain only syntax for aggregations of type A.

    Implements contain only syntax for aggregations of type A.

    aggregation

    an aggregation about which an assertion is being made

    eles

    the only elements that should be contained in the passed aggregation

    returns

    true if the passed aggregation contains only the passed elements

  5. abstract def containsTheSameElementsAs(leftAggregation: A, rightAggregation: GenTraversable[Any]): Boolean

    Implements contain theSameElementsAs syntax for aggregations of type A.

    Implements contain theSameElementsAs syntax for aggregations of type A.

    leftAggregation

    an aggregation about which an assertion is being made

    rightAggregation

    an aggregation that should contain the same elements as the passed leftAggregation

    returns

    true if the passed leftAggregation contains the same elements as the passed rightAggregation

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  1. def finalize(): Unit
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