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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
55 lines
2.1 KiB
Java
55 lines
2.1 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.testing;
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import org.mockito.invocation.InvocationOnMock;
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import org.mockito.stubbing.Answer;
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/**
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* Display helpful failure message if a mocked method is called.
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*
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* <p>One important problem this solves is when you mock servlets and the test fails, you usually
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* end up with failure messages like {@code Wanted but not invoked: rsp.setStatus(200)} which
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* aren't very helpful. This is because servlets normally report problems by calling
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* {@link javax.servlet.http.HttpServletResponse#sendError(int, String) rsp.sendError()} so it'd be
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* nice if we could have the error message be whatever arguments get passed to {@code sendError}.
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*
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* <p>And that's where {@link FailAnswer} comes to the rescue! Here's an example of what you could
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* put at the beginning of a servlet test method to have better error messages:
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*
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* <pre> {@code
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* doAnswer(new FailAnswer<>()).when(rsp).sendError(anyInt());
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* doAnswer(new FailAnswer<>()).when(rsp).sendError(anyInt(), anyString());
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* }</pre>
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*
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* @param <T> The return type of the mocked method (which doesn't actually return).
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*/
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public class FailAnswer<T> implements Answer<T> {
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@Override
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public T answer(@SuppressWarnings("null") InvocationOnMock args) throws Throwable {
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StringBuilder msg = new StringBuilder();
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boolean first = true;
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for (Object arg : args.getArguments()) {
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if (first) {
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first = false;
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} else {
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msg.append(", ");
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}
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msg.append(arg);
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}
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throw new AssertionError(msg.toString());
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}
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}
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