org.scalatest.words

WillVerb

trait WillVerb extends AnyRef

Provides an implicit conversion that adds will methods to String to support the syntax of FlatSpec, WordSpec, fixture.FlatSpec, and fixture.WordSpec.

For example, this trait enables syntax such as the following test registration in FlatSpec and fixture.FlatSpec:

"A Stack (when empty)" will "be empty" in { ... }
                       ^

It also enables syntax such as the following shared test registration in FlatSpec and fixture.FlatSpec:

"A Stack (with one item)" will behave like nonEmptyStack(stackWithOneItem, lastValuePushed)
                          ^

In addition, it supports the registration of subject descriptions in WordSpec and fixture.WordSpec, such as:

"A Stack (when empty)" will { ...
                       ^

And finally, it also supportds the registration of subject descriptions with after words in WordSpec and fixture.WordSpec. For example:

   def provide = afterWord("provide")

  "The ScalaTest Matchers DSL" will provide {
                               ^

The reason this implicit conversion is provided in a separate trait, instead of being provided directly in FlatSpec, WordSpec, fixture.FlatSpec, and fixture.WordSpec, is because an implicit conversion provided directly would conflict with the implicit conversion that provides will methods on String in the Matchers trait. By contrast, there is no conflict with the separate WillVerb trait approach, because:

So whether or not a FlatSpec, WordSpec, fixture.FlatSpec, or fixture.WordSpec mixes in Matchers, there will only be one implicit conversion in scope that adds will methods to Strings.

Also, because the class of the result of the overriding convertToStringWillWrapper implicit conversion method provided in Matchers extends this trait's StringWillWrapperForVerb class, the four uses of will provided here are still available. These four will are in fact available to any class that mixes in Matchers, but each takes an implicit parameter that is provided only in FlatSpec and fixture.FlatSpec, or WordSpec and fixture.WordSpec.

Source
WillVerb.scala
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Type Members

  1. trait StringWillWrapperForVerb extends AnyRef

    This class supports the syntax of FlatSpec, WordSpec, fixture.FlatSpec, and fixture.WordSpec.

Value Members

  1. final def !=(arg0: AnyRef): Boolean

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  2. final def !=(arg0: Any): Boolean

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  8. implicit def convertToStringWillWrapper(o: String): StringWillWrapperForVerb

    Implicitly converts an object of type String to a StringWillWrapperForVerb, to enable will methods to be invokable on that object.

    Implicitly converts an object of type String to a StringWillWrapperForVerb, to enable will methods to be invokable on that object.

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  11. def finalize(): Unit

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