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Groovy example source code file (MockSingleCallTest.groovy)

This example Groovy source code file (MockSingleCallTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

caller, groovyruntimeexception, groovytestcase, illegalargumentexception, illegalargumentexception, mockfor, mockfor, mocksinglecalltest, mocksinglecalltest, object, object

The Groovy MockSingleCallTest.groovy source code

package groovy.mock.interceptor

import junit.framework.AssertionFailedError

/**
    Testing Groovy Mock support for single calls to the Collaborator with
    no, one, multiple, or arbitrary arguments, exceptions and failures.
    @author Dierk Koenig
*/

class MockSingleCallTest extends GroovyTestCase {

    MockFor mocker

    void setUp() {
        mocker = new MockFor(Collaborator.class)
    }

    void testMockGetter() {
       mocker.demand.getFoo { "foo" }
       mocker.demand.getFoo { "foobar" }
       mocker.use {
           assertEquals "foo", new Caller().callFoo1()
           assertEquals "foobar", new Caller().callFoo2()       
       }
    }

    void testMockSetter() {

        def result = null
        
        mocker.demand.setBar { result = it }
        mocker.demand.setBar { result = it }

        mocker.use {
            new Caller().setBar1()
            assertEquals result, "bar1"
            new Caller().setBar2()
            assertEquals result, "bar2"

        }
    }
    
    void testSingleCallNoArgs() {
        mocker.demand.one { 1 }
        mocker.use {
            assertEquals 1, new Caller().collaborateOne()
        }
    }
    void testSingleCallOneArg() {
        mocker.demand.one { arg -> return arg }
        mocker.use {
            assertEquals 2, new Caller().collaborateOne(2)
        }
    }
    void testSingleCallTwoArgs() {
        mocker.demand.one { one, two -> return one + two }
        mocker.use {
            assertEquals 2, new Caller().collaborateOne(1, 1)
        }
    }
    void testNoSingleCallTwoArgsWhenNoArgDemanded() {
        mocker.demand.one { 2 }
        mocker.use {
            shouldFail {
                assertEquals 2, new Caller().collaborateOne(1, 1)
            }
        }
    }
    void testSingleCallTwoArgsWhenArbitraryArgsDemanded() {
        mocker.demand.one { Object[] arg ->  2 }
        mocker.use {
            assertEquals 2, new Caller().collaborateOne(1, 1)
        }
    }
    void testSingleCallTwoArgsWhenDefaultArgsDemanded() {
        mocker.demand.one { one=null, two=null ->  2 }
        mocker.use {
            assertEquals 2, new Caller().collaborateOne(1, 1)
        }
    }
    void testVerifyFailsIfOneDemandedButNoneExcecuted() {
        mocker.demand.one { 1 }
        def msg = shouldFail(AssertionFailedError.class) {
            mocker.use {
                // no call
            }
        }
        /* This is a fragile test smell! We've changed the message text of the exception, and this test fails due to this assert.
           If we think this assert is important, we should extend AssertionFailedError and add the properties
           expectedRange and callCount to it. But I think the test is good enough with just checking for the thrown
           exception. */
        // assert msg =~ /0.*1..1.*never called/ 
    }
    void testFirstOptionalOmitted() {
        mocker.demand.one(0..1) { 1 }
        mocker.use {
            def caller = new Caller()
        }
        // Getting here means no exception, which is what we want to test.  (Fix for GROOVY-2309)
    }
    void testSingleCallExceptionDemanded() {
        mocker.demand.one { throw new IllegalArgumentException() }
        mocker.use {
//            shouldFail(IllegalArgumentException.class) {
            shouldFail { // todo: should fail with IllegalArgumentException instead of GroovyRuntimeException
                new Caller().collaborateOne()
            }
        }
    }
    void testSingleCallFailDemanded() {
        mocker.demand.one { fail 'just kidding' }
        mocker.use {
            shouldFail() { new Caller().collaborateOne() }
        }
    }
    void testJavaCall() {
        mocker = new MockFor(String.class)
        mocker.demand.toString { 'groovy' }
        mocker.use {
            assertEquals 'groovy', new Caller().collaborateJava()
        }
    }

}



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