| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.beam.sdk.util; |
| |
| import static org.hamcrest.Matchers.instanceOf; |
| import static org.hamcrest.Matchers.is; |
| import static org.hamcrest.Matchers.isA; |
| import static org.hamcrest.Matchers.not; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThat; |
| |
| import java.io.IOException; |
| import org.hamcrest.Description; |
| import org.hamcrest.FeatureMatcher; |
| import org.hamcrest.Matcher; |
| import org.hamcrest.TypeSafeMatcher; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.ExpectedException; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for {@link UserCodeException} functionality. */ |
| @RunWith(JUnit4.class) |
| public class UserCodeExceptionTest { |
| |
| @Rule public ExpectedException thrown = ExpectedException.none(); |
| |
| @Test |
| public void existingUserCodeExceptionsNotWrapped() { |
| UserCodeException existing = UserCodeException.wrap(new IOException()); |
| UserCodeException wrapped = UserCodeException.wrap(existing); |
| |
| assertEquals(existing, wrapped); |
| } |
| |
| @Test |
| public void testCauseIsSet() { |
| thrown.expectCause(isA(IOException.class)); |
| throwUserCodeException(); |
| } |
| |
| @Test |
| public void testStackTraceIsTruncatedToUserCode() { |
| thrown.expectCause(hasBottomStackFrame(method("userCode"))); |
| throwUserCodeException(); |
| } |
| |
| @Test |
| public void testStackTraceIsTruncatedProperlyFromHelperMethod() { |
| thrown.expectCause(hasBottomStackFrame(method("userCode"))); |
| throwUserCodeExceptionFromHelper(); |
| } |
| |
| @Test |
| public void testWrapIfOnlyWrapsWhenTrue() { |
| IOException cause = new IOException(); |
| RuntimeException wrapped = UserCodeException.wrapIf(true, cause); |
| |
| assertThat(wrapped, is(instanceOf(UserCodeException.class))); |
| } |
| |
| @Test |
| public void testWrapIfReturnsRuntimeExceptionWhenFalse() { |
| IOException cause = new IOException(); |
| RuntimeException wrapped = UserCodeException.wrapIf(false, cause); |
| |
| assertThat(wrapped, is(not(instanceOf(UserCodeException.class)))); |
| assertEquals(cause, wrapped.getCause()); |
| } |
| |
| @Test |
| public void testWrapIfReturnsSourceRuntimeExceptionWhenFalse() { |
| RuntimeException runtimeException = new RuntimeException("oh noes!"); |
| RuntimeException wrapped = UserCodeException.wrapIf(false, runtimeException); |
| |
| assertEquals(runtimeException, wrapped); |
| } |
| |
| @Test |
| public void robustAgainstEmptyStackTrace() { |
| RuntimeException runtimeException = new RuntimeException("empty stack"); |
| runtimeException.setStackTrace(new StackTraceElement[0]); |
| RuntimeException wrapped = UserCodeException.wrap(runtimeException); |
| assertEquals(runtimeException, wrapped.getCause()); |
| } |
| |
| private void throwUserCodeException() { |
| try { |
| userCode(); |
| } catch (Exception ex) { |
| throw UserCodeException.wrap(ex); |
| } |
| } |
| |
| private void throwUserCodeExceptionFromHelper() { |
| try { |
| userCode(); |
| } catch (Exception ex) { |
| throw wrap(ex); |
| } |
| } |
| |
| private UserCodeException wrap(Throwable t) { |
| throw UserCodeException.wrap(t); |
| } |
| |
| private void userCode() throws IOException { |
| userCode2(); |
| } |
| |
| private void userCode2() throws IOException { |
| userCode3(); |
| } |
| |
| private void userCode3() throws IOException { |
| IOException ex = new IOException("User processing error!"); |
| throw ex; |
| } |
| |
| private static ThrowableBottomStackFrameMethodMatcher hasBottomStackFrame( |
| Matcher<StackTraceElement> frameMatcher) { |
| return new ThrowableBottomStackFrameMethodMatcher(frameMatcher); |
| } |
| |
| private static StackFrameMethodMatcher method(String methodName) { |
| return new StackFrameMethodMatcher(is(methodName)); |
| } |
| |
| static class ThrowableBottomStackFrameMethodMatcher |
| extends FeatureMatcher<Throwable, StackTraceElement> { |
| |
| public ThrowableBottomStackFrameMethodMatcher(Matcher<StackTraceElement> subMatcher) { |
| super(subMatcher, "Throwable with bottom stack frame:", "stack frame"); |
| } |
| |
| @Override |
| protected StackTraceElement featureValueOf(Throwable actual) { |
| StackTraceElement[] stackTrace = actual.getStackTrace(); |
| return stackTrace[stackTrace.length - 1]; |
| } |
| } |
| |
| static class StackFrameMethodMatcher extends TypeSafeMatcher<StackTraceElement> { |
| |
| private Matcher<String> methodNameMatcher; |
| |
| public StackFrameMethodMatcher(Matcher<String> methodNameMatcher) { |
| this.methodNameMatcher = methodNameMatcher; |
| } |
| |
| @Override |
| public void describeTo(Description description) { |
| description.appendText("stack frame where method name "); |
| methodNameMatcher.describeTo(description); |
| } |
| |
| @Override |
| protected boolean matchesSafely(StackTraceElement item) { |
| return methodNameMatcher.matches(item.getMethodName()); |
| } |
| } |
| } |