Package: groovy.mock.interceptor

## [Groovy] Class StubFor

- groovy.mock.interceptor.StubFor

- StubFor supports (typically unit) testing of classes in isolation by allowing a loosely-ordered expectation of the behavior of collaborators to be defined. A typical test scenario involves a class under test (CUT) and one or more collaborators. In such a scenario it is often desirable to just test the business logic of the CUT. One strategy for doing that is to replace the collaborator instances with simplified stub objects to help isolate out the logic in the CUT. StubFor allows such stubs to be created using meta-programming. The desired behavior of collaborators is defined as a behavior specification. The behavior can be checked by the user using verify(). With StubFor, a stub's expectation is sequence independent and use of verify() is left to the user. Typical usage is as follows: <

       import groovy.mock.interceptor.StubFor

       class Person {
         String first, last
       }

       class Family {
         Person mother, father
         def nameOfFather() { "$father.first $father.last" }
       }

       def stub = new StubFor(Person)
       stub.demand.with {
         getLast{ 'name' }
         getFirst{ 'dummy' }
       }
       stub.use {
         def john = new Person(first:'John', last:'Smith')
         def f = new Family(father:john)
         assert f.nameOfFather() == 'dummy name'
       }
       stub.expect.verify()

  Here, `Family` is our class under test and `Person` is the collaborator. We are using normal Groovy property semantics here; hence the statement `father.first` causes a call to `father.getFirst()` to occur. For a complete list of features, see: MockFor.

- - ### Properties Summary

    Properties
    Type | Name and description
    --- | ---
    `Class` | `clazz`
    `Demand` | `demand`
    `def` | `expect`
    `Ignore` | `ignore`
    `Map` | `instanceExpectations`
    `MockProxyMetaClass` | `proxy`

  - ### Constructor Summary

    Constructors
    Constructor and description
    `StubFor (Class clazz, boolean interceptConstruction = false)`

  - ### Methods Summary

    Methods
    Type Params | Return Type | Name and description
    --- | --- | ---
    `` | `def` | `ignore(Object filter, Closure filterBehavior = null)` Allows particular method calls to be ignored and not treated as part of the required behavior specification.
    `` | `GroovyObject` | `makeProxyInstance(def args, boolean isDelegate)`
    `` | `GroovyObject` | `proxyDelegateInstance(def args = null)` Allows a more traditional instance-style stubbing paradigm.
    `` | `GroovyObject` | `proxyInstance(def args = null)` Allows a more traditional instance-style stubbing paradigm.
    `` | `void` | `use(Closure closure)` @See MockFor#use(Closure)
    `` | `void` | `use(GroovyObject obj, Closure closure)`
    `` | `void` | `verify(GroovyObject obj)` For manual verification
    `` | `void` | `verify()` Convenience method

  - ### Inherited Methods Summary

    Inherited Methods
    Methods inherited from class | Name
    --- | ---
    `class Object` | `wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll`

- - ### Property Detail

    - #### Class clazz

    - #### Demand demand

    - #### def expect

    - #### Ignore ignore

    - #### Map instanceExpectations

    - #### MockProxyMetaClass proxy

  - ### Constructor Detail

    - #### StubFor(Class clazz, boolean interceptConstruction = false)

  - ### Method Detail

    - #### def ignore(Object filter, Closure filterBehavior = null)

      Allows particular method calls to be ignored and not treated as part of the required behavior specification. If you don't specify a return closure the method call will fall through to the underlying instance, i.e. half-mock style. The `filter` object is invoked using the normal Groovy `isCase()` semantics.

      See:
        MockFor#ignore(Object, Closure)

    - #### GroovyObject makeProxyInstance(def args, boolean isDelegate)

    - #### GroovyObject proxyDelegateInstance(def args = null)

      Allows a more traditional instance-style stubbing paradigm. This is the recommended method to call to use the instance-style with Java classes.

      See:
        MockFor#proxyDelegateInstance(Object)

    - #### GroovyObject proxyInstance(def args = null)

      Allows a more traditional instance-style stubbing paradigm. This is the recommended method to call to use the instance-style with Groovy classes.

      See:
        MockFor#proxyInstance(Object)

    - #### void use(Closure closure)

      See:
        MockFor#use(Closure)

    - #### void use(GroovyObject obj, Closure closure)

    - #### void verify(GroovyObject obj)

      For manual verification

    - #### void verify()

      Convenience method