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1
3 package test.jmock.examples.calculator.expression;
4
5 import org.jmock.Mock;
6 import org.jmock.MockObjectTestCase;
7 import org.jmock.examples.calculator.CalculatorException;
8 import org.jmock.examples.calculator.Environment;
9 import org.jmock.examples.calculator.Expression;
10 import org.jmock.examples.calculator.SimpleEnvironment;
11 import org.jmock.examples.calculator.expression.VariableReference;
12
13
14 public class VariableReferenceTest extends MockObjectTestCase
15 {
16
17 private final String  variableName = "VARIABLE NAME";
18 private Mock mockDefinition;
19 private VariableReference variableReference;
20
21 public void setUp() {
22 mockDefinition = mock(Expression.class, "mockDefinition");
23 variableReference = new VariableReference(variableName);
24 }
25
26 public void testEvaluatesDefinitionOfReferencedVariable() throws Exception {
27 Mock mockEnvironment = mock(Environment.class);
28 double result = 1234;
29
30 mockEnvironment.expects(once()).method("getVariable").with(eq(variableName))
31 .will(returnValue(mockDefinition.proxy()));
32 mockDefinition.expects(once()).method("evaluate").with(same(mockEnvironment.proxy()))
33 .will(returnValue(result));
34
35 assertEquals("should be result of evaluating variable definition",
36 result,
37 variableReference.evaluate((Environment)mockEnvironment.proxy()),
38 0);
39 }
40
41 public void testPassesBackExceptionsFromVariableDefiniton() {
42 SimpleEnvironment environment = new SimpleEnvironment();
43 environment.setVariable(variableName, (Expression)mockDefinition.proxy());
44 CalculatorException thrown = new CalculatorException("THROWN EXCEPTION");
45
46 mockDefinition.expects(once()).method("evaluate").with(eq(environment))
47 .will(throwException(thrown));
48
49 try {
50 variableReference.evaluate(environment);
51 fail("expected CalculatorException to be thrown");
52 }
53 catch (CalculatorException caught) {
54 assertSame("should be thrown exception", thrown, caught);
55 }
56 }
57
58 public void testThrowsCalculatorExceptionIfVariableNotDefined() {
59 SimpleEnvironment environment = new SimpleEnvironment();
60
61 try {
62 variableReference.evaluate(environment);
63 fail("expected CalculatorException to be thrown");
64 }
65 catch (CalculatorException ex) {
66 assertTrue("should contain variable name in message",
67 ex.getMessage().indexOf(variableName) >= 0);
68 }
69 }
70 }
71 |
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