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1
3 package test.jmock.core.stub;
4
5 import junit.framework.AssertionFailedError;
6 import junit.framework.TestCase;
7 import org.jmock.core.Invocation;
8 import org.jmock.core.stub.ReturnStub;
9 import org.jmock.expectation.AssertMo;
10 import test.jmock.core.testsupport.MethodFactory;
11
12
13 public class ReturnStubTest
14 extends TestCase
15 {
16 static final String  RESULT = "result";
17
18 MethodFactory methodFactory;
19 Object invokedObject;
20 Class invokedObjectClass;
21 Invocation invocation;
22 ReturnStub returnStub;
23
24 public void setUp() {
25 methodFactory = new MethodFactory();
26
27 invokedObject = "INVOKED-OBJECT";
28 invokedObjectClass = Void .class;
29
30 returnStub = new ReturnStub(RESULT);
31 }
32
33 public void testReturnsValuePassedToConstructor() throws Throwable {
34 invocation = new Invocation(invokedObject, methodFactory.newMethodReturning(RESULT.getClass()), null);
35
36 assertSame("Should be the same result object",
37 RESULT, returnStub.invoke(invocation));
38 }
39
40 public void testIncludesValueInDescription() {
41 StringBuffer buffer = new StringBuffer ();
42
43 returnStub.describeTo(buffer);
44
45 String description = buffer.toString();
46
47 assertTrue("contains result in description",
48 description.indexOf(RESULT.toString()) >= 0);
49 assertTrue("contains 'returns' in description",
50 description.indexOf("returns") >= 0);
51 }
52
53 public void testThrowsAssertionFailedErrorIfTriesToReturnValueOfIncompatibleType()
54 throws Throwable {
55 invocation = new Invocation(invokedObject, methodFactory.newMethodReturning(int.class), null);
56
57 try {
58 returnStub.invoke(invocation);
59 }
60 catch (AssertionFailedError ex) {
61 AssertMo.assertIncludes("expected return type", invocation.invokedMethod.getReturnType().toString(), ex.getMessage());
62 AssertMo.assertIncludes("returned value type", RESULT.getClass().toString(), ex.getMessage());
63 return;
64 }
65 fail("should have failed");
66 }
67
68 public void testThrowsAssertionFailedErrorIfTriesToReturnValueFromVoidMethod()
69 throws Throwable {
70 invocation = new Invocation(invokedObject, methodFactory.newMethodReturning(void.class), null);
71
72 try {
73 returnStub.invoke(invocation);
74 }
75 catch (AssertionFailedError ex) {
76 AssertMo.assertIncludes("should describe error",
77 "tried to return a value from a void method", ex.getMessage());
78 return;
79 }
80 fail("should have failed");
81 }
82
83 public void testCanReturnNullReference()
84 throws Throwable {
85 invocation = new Invocation(invokedObject, methodFactory.newMethodReturning(String .class), null);
86
87 returnStub = new ReturnStub(null);
88
89 assertNull("should return null", returnStub.invoke(invocation));
90 }
91
92 public void testThrowsAssertionFailedErrorIfTriesToReturnNullFromMethodWithPrimitiveReturnType()
93 throws Throwable {
94 invocation = new Invocation(invokedObject, methodFactory.newMethodReturning(int.class), null);
95
96 returnStub = new ReturnStub(null);
97
98 try {
99 returnStub.invoke(invocation);
100 }
101 catch (AssertionFailedError ex) {
102 AssertMo.assertIncludes("expected return type", invocation.invokedMethod.getReturnType().toString(), ex.getMessage());
103 AssertMo.assertIncludes("null", String.valueOf((Object )null), ex.getMessage());
104 return;
105 }
106 fail("should have failed");
107 }
108 }
109 |
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