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POUsing jmockit expectations with matchers and primitive types
 

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    <p>I'm using jmockit for unit testing (with TestNG), and I'm having trouble using the Expectations class to mock out a method that takes a primitive type (boolean) as a parameter, using a matcher. Here's some sample code that illustrates the problem.</p> <pre><code>/******************************************************/ import static org.hamcrest.Matchers.is; import mockit.Expectations; import org.testng.annotations.Test; public class PrimitiveMatcherTest { private MyClass obj; @Test public void testPrimitiveMatcher() { new Expectations(true) { MyClass c; { obj = c; invokeReturning(c.getFoo(with(is(false))), "bas"); } }; assert "bas".equals(obj.getFoo(false)); Expectations.assertSatisfied(); } public static class MyClass { public String getFoo(boolean arg) { if (arg) { return "foo"; } else { return "bar"; } } } } /******************************************************/ </code></pre> <p>The line containing the call to invokeReturning(...) throws a NullPointerException.</p> <p>If I change this call to not use a matcher, as in:</p> <pre><code>invokeReturning(c.getFoo(false), "bas"); </code></pre> <p>it works just fine. This is no good for me, because in my real code I'm actually mocking a multi-parameter method and I need to use a matcher on another argument. In this case, the Expectations class requires that <strong>all</strong> arguments use a matcher.</p> <p>I'm pretty sure this is a bug, or perhaps it's not possible to use Matchers with primitive types (that would make me sad). Has anyone encountered this issue, and know how to get around it?</p>
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