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More flexible expectations

So far, when recording expected method calls, we have not said anything about the expected arguments. Sometimes we know exactly what the arguments should be, as variables available in the tester:

expect (mock1.xyz ("ABC123", mock2));

At other times we need to use "matchers". If a matcher is used for any argument then all arguments must use matchers. Eg,

expect (mock1.xyz (startsWith ("ABC"), isA (ProductCode.class)));

The EasyMock API documentation shows all of the standard matchers that are available. It also describes how to create your own more specific matchers, as implementations of org.easymock.IArgumentMatcher.

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