757 lines
23 KiB
Java
757 lines
23 KiB
Java
/*
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* Copyright (C) 2007 The Guava Authors
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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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*/
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package com.google.common.base;
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import static com.google.common.base.StandardSystemProperty.JAVA_SPECIFICATION_VERSION;
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import static com.google.common.base.Throwables.getStackTraceAsString;
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import static com.google.common.base.Throwables.lazyStackTrace;
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import static com.google.common.base.Throwables.lazyStackTraceIsLazy;
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import static com.google.common.base.Throwables.throwIfInstanceOf;
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import static com.google.common.base.Throwables.throwIfUnchecked;
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import static com.google.common.truth.Truth.assertThat;
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import static java.util.Arrays.asList;
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import static java.util.regex.Pattern.quote;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.annotations.GwtIncompatible;
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import com.google.common.collect.Iterables;
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import com.google.common.primitives.Ints;
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import com.google.common.testing.NullPointerTester;
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import java.util.List;
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import junit.framework.TestCase;
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/**
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* Unit test for {@link Throwables}.
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*
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* @author Kevin Bourrillion
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*/
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@GwtCompatible(emulated = true)
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public class ThrowablesTest extends TestCase {
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public void testThrowIfUnchecked_Unchecked() {
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try {
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throwIfUnchecked(new SomeUncheckedException());
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fail();
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} catch (SomeUncheckedException expected) {
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}
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}
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public void testThrowIfUnchecked_Error() {
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try {
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throwIfUnchecked(new SomeError());
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fail();
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} catch (SomeError expected) {
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}
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}
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@SuppressWarnings("ThrowIfUncheckedKnownChecked")
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public void testThrowIfUnchecked_Checked() {
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throwIfUnchecked(new SomeCheckedException());
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}
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@GwtIncompatible // propagateIfPossible
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public void testPropagateIfPossible_NoneDeclared_NoneThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatDoesntThrowAnything();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(t);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect no exception to be thrown
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sample.noneDeclared();
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}
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@GwtIncompatible // propagateIfPossible
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public void testPropagateIfPossible_NoneDeclared_UncheckedThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatThrowsUnchecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(t);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the unchecked exception to propagate as-is
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try {
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sample.noneDeclared();
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fail();
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} catch (SomeUncheckedException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible
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public void testPropagateIfPossible_NoneDeclared_UndeclaredThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatThrowsUndeclaredChecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(t);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the undeclared exception to have been chained inside another
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try {
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sample.noneDeclared();
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fail();
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} catch (SomeChainingException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class)
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public void testPropagateIfPossible_OneDeclared_NoneThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatDoesntThrowAnything();
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} catch (Throwable t) {
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// yes, this block is never reached, but for purposes of illustration
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// we're keeping it the same in each test
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Throwables.propagateIfPossible(t, SomeCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect no exception to be thrown
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sample.oneDeclared();
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class)
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public void testPropagateIfPossible_OneDeclared_UncheckedThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatThrowsUnchecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(t, SomeCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the unchecked exception to propagate as-is
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try {
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sample.oneDeclared();
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fail();
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} catch (SomeUncheckedException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class)
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public void testPropagateIfPossible_OneDeclared_CheckedThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatThrowsChecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(t, SomeCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the checked exception to propagate as-is
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try {
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sample.oneDeclared();
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fail();
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} catch (SomeCheckedException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class)
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public void testPropagateIfPossible_OneDeclared_UndeclaredThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatThrowsUndeclaredChecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(t, SomeCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the undeclared exception to have been chained inside another
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try {
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sample.oneDeclared();
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fail();
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} catch (SomeChainingException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class, Class)
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public void testPropagateIfPossible_TwoDeclared_NoneThrown()
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throws SomeCheckedException, SomeOtherCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void twoDeclared() throws SomeCheckedException, SomeOtherCheckedException {
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try {
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methodThatDoesntThrowAnything();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(
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t, SomeCheckedException.class, SomeOtherCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect no exception to be thrown
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sample.twoDeclared();
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class, Class)
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public void testPropagateIfPossible_TwoDeclared_UncheckedThrown()
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throws SomeCheckedException, SomeOtherCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void twoDeclared() throws SomeCheckedException, SomeOtherCheckedException {
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try {
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methodThatThrowsUnchecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(
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t, SomeCheckedException.class, SomeOtherCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the unchecked exception to propagate as-is
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try {
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sample.twoDeclared();
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fail();
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} catch (SomeUncheckedException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class, Class)
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public void testPropagateIfPossible_TwoDeclared_CheckedThrown() throws SomeOtherCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void twoDeclared() throws SomeCheckedException, SomeOtherCheckedException {
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try {
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methodThatThrowsChecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(
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t, SomeCheckedException.class, SomeOtherCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the checked exception to propagate as-is
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try {
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sample.twoDeclared();
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fail();
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} catch (SomeCheckedException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class, Class)
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public void testPropagateIfPossible_TwoDeclared_OtherCheckedThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void twoDeclared() throws SomeCheckedException, SomeOtherCheckedException {
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try {
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methodThatThrowsOtherChecked();
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} catch (Throwable t) {
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Throwables.propagateIfPossible(
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t, SomeCheckedException.class, SomeOtherCheckedException.class);
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throw new SomeChainingException(t);
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}
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}
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};
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// Expect the checked exception to propagate as-is
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try {
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sample.twoDeclared();
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fail();
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} catch (SomeOtherCheckedException expected) {
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}
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}
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public void testThrowIfUnchecked_null() throws SomeCheckedException {
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try {
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throwIfUnchecked(null);
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fail();
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} catch (NullPointerException expected) {
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}
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}
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@GwtIncompatible // propagateIfPossible
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public void testPropageIfPossible_null() throws SomeCheckedException {
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Throwables.propagateIfPossible(null);
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class)
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public void testPropageIfPossible_OneDeclared_null() throws SomeCheckedException {
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Throwables.propagateIfPossible(null, SomeCheckedException.class);
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}
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@GwtIncompatible // propagateIfPossible(Throwable, Class, Class)
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public void testPropageIfPossible_TwoDeclared_null() throws SomeCheckedException {
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Throwables.propagateIfPossible(null, SomeCheckedException.class, SomeUncheckedException.class);
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}
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@GwtIncompatible // propagate
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public void testPropagate_NoneDeclared_NoneThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatDoesntThrowAnything();
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} catch (Throwable t) {
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect no exception to be thrown
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sample.noneDeclared();
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}
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@GwtIncompatible // propagate
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public void testPropagate_NoneDeclared_UncheckedThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatThrowsUnchecked();
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} catch (Throwable t) {
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect the unchecked exception to propagate as-is
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try {
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sample.noneDeclared();
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fail();
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} catch (SomeUncheckedException expected) {
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}
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}
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@GwtIncompatible // propagate
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public void testPropagate_NoneDeclared_ErrorThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatThrowsError();
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} catch (Throwable t) {
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect the error to propagate as-is
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try {
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sample.noneDeclared();
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fail();
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} catch (SomeError expected) {
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}
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}
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@GwtIncompatible // propagate
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public void testPropagate_NoneDeclared_CheckedThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void noneDeclared() {
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try {
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methodThatThrowsChecked();
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} catch (Throwable t) {
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect the undeclared exception to have been chained inside another
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try {
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sample.noneDeclared();
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fail();
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} catch (RuntimeException expected) {
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assertThat(expected).hasCauseThat().isInstanceOf(SomeCheckedException.class);
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testThrowIfInstanceOf_Unchecked() throws SomeCheckedException {
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throwIfInstanceOf(new SomeUncheckedException(), SomeCheckedException.class);
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testThrowIfInstanceOf_CheckedDifferent() throws SomeCheckedException {
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throwIfInstanceOf(new SomeOtherCheckedException(), SomeCheckedException.class);
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testThrowIfInstanceOf_CheckedSame() {
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try {
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throwIfInstanceOf(new SomeCheckedException(), SomeCheckedException.class);
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fail();
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} catch (SomeCheckedException expected) {
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testThrowIfInstanceOf_CheckedSubclass() {
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try {
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throwIfInstanceOf(new SomeCheckedException() {}, SomeCheckedException.class);
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fail();
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} catch (SomeCheckedException expected) {
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testPropagateIfInstanceOf_NoneThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatDoesntThrowAnything();
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} catch (Throwable t) {
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Throwables.propagateIfInstanceOf(t, SomeCheckedException.class);
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect no exception to be thrown
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sample.oneDeclared();
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testPropagateIfInstanceOf_DeclaredThrown() {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatThrowsChecked();
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} catch (Throwable t) {
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Throwables.propagateIfInstanceOf(t, SomeCheckedException.class);
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect declared exception to be thrown as-is
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try {
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sample.oneDeclared();
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fail();
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} catch (SomeCheckedException expected) {
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testPropagateIfInstanceOf_UncheckedThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatThrowsUnchecked();
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} catch (Throwable t) {
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Throwables.propagateIfInstanceOf(t, SomeCheckedException.class);
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect unchecked exception to be thrown as-is
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try {
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sample.oneDeclared();
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fail();
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} catch (SomeUncheckedException expected) {
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testPropagateIfInstanceOf_UndeclaredThrown() throws SomeCheckedException {
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Sample sample =
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new Sample() {
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@Override
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public void oneDeclared() throws SomeCheckedException {
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try {
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methodThatThrowsOtherChecked();
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} catch (Throwable t) {
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Throwables.propagateIfInstanceOf(t, SomeCheckedException.class);
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throw Throwables.propagate(t);
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}
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}
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};
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// Expect undeclared exception wrapped by RuntimeException to be thrown
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try {
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sample.oneDeclared();
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fail();
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} catch (RuntimeException expected) {
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assertThat(expected).hasCauseThat().isInstanceOf(SomeOtherCheckedException.class);
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testThrowIfInstanceOf_null() throws SomeCheckedException {
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try {
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throwIfInstanceOf(null, SomeCheckedException.class);
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fail();
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} catch (NullPointerException expected) {
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}
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}
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@GwtIncompatible // throwIfInstanceOf
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public void testPropageIfInstanceOf_null() throws SomeCheckedException {
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Throwables.propagateIfInstanceOf(null, SomeCheckedException.class);
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}
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public void testGetRootCause_NoCause() {
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SomeCheckedException exception = new SomeCheckedException();
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assertSame(exception, Throwables.getRootCause(exception));
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}
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public void testGetRootCause_SingleWrapped() {
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SomeCheckedException cause = new SomeCheckedException();
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SomeChainingException exception = new SomeChainingException(cause);
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assertSame(cause, Throwables.getRootCause(exception));
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}
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public void testGetRootCause_DoubleWrapped() {
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SomeCheckedException cause = new SomeCheckedException();
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SomeChainingException exception = new SomeChainingException(new SomeChainingException(cause));
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assertSame(cause, Throwables.getRootCause(exception));
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}
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public void testGetRootCause_Loop() {
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Exception cause = new Exception();
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Exception exception = new Exception(cause);
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cause.initCause(exception);
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try {
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Throwables.getRootCause(cause);
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fail("Should have throw IAE");
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} catch (IllegalArgumentException expected) {
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assertThat(expected).hasCauseThat().isSameInstanceAs(cause);
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}
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}
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private static class SomeError extends Error {}
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private static class SomeCheckedException extends Exception {}
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private static class SomeOtherCheckedException extends Exception {}
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private static class SomeUncheckedException extends RuntimeException {}
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private static class SomeUndeclaredCheckedException extends Exception {}
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private static class SomeChainingException extends RuntimeException {
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public SomeChainingException(Throwable cause) {
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super(cause);
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}
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}
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static class Sample {
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void noneDeclared() {}
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void oneDeclared() throws SomeCheckedException {}
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void twoDeclared() throws SomeCheckedException, SomeOtherCheckedException {}
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}
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static void methodThatDoesntThrowAnything() {}
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static void methodThatThrowsError() {
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throw new SomeError();
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}
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static void methodThatThrowsUnchecked() {
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throw new SomeUncheckedException();
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}
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static void methodThatThrowsChecked() throws SomeCheckedException {
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throw new SomeCheckedException();
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}
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static void methodThatThrowsOtherChecked() throws SomeOtherCheckedException {
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throw new SomeOtherCheckedException();
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}
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static void methodThatThrowsUndeclaredChecked() throws SomeUndeclaredCheckedException {
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throw new SomeUndeclaredCheckedException();
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}
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@GwtIncompatible // getStackTraceAsString(Throwable)
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public void testGetStackTraceAsString() {
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class StackTraceException extends Exception {
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StackTraceException(String message) {
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super(message);
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}
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}
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StackTraceException e = new StackTraceException("my message");
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String firstLine = quote(e.getClass().getName() + ": " + e.getMessage());
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String secondLine = "\\s*at " + ThrowablesTest.class.getName() + "\\..*";
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String moreLines = "(?:.*\n?)*";
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String expected = firstLine + "\n" + secondLine + "\n" + moreLines;
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assertThat(getStackTraceAsString(e)).matches(expected);
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}
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public void testGetCausalChain() {
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SomeUncheckedException sue = new SomeUncheckedException();
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IllegalArgumentException iae = new IllegalArgumentException(sue);
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RuntimeException re = new RuntimeException(iae);
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IllegalStateException ex = new IllegalStateException(re);
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assertEquals(asList(ex, re, iae, sue), Throwables.getCausalChain(ex));
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assertSame(sue, Iterables.getOnlyElement(Throwables.getCausalChain(sue)));
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List<Throwable> causes = Throwables.getCausalChain(ex);
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try {
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causes.add(new RuntimeException());
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fail("List should be unmodifiable");
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} catch (UnsupportedOperationException expected) {
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}
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}
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public void testGetCasualChainNull() {
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try {
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Throwables.getCausalChain(null);
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fail("Should have throw NPE");
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} catch (NullPointerException expected) {
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}
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}
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public void testGetCasualChainLoop() {
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Exception cause = new Exception();
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Exception exception = new Exception(cause);
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cause.initCause(exception);
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try {
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Throwables.getCausalChain(cause);
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fail("Should have throw IAE");
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} catch (IllegalArgumentException expected) {
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assertThat(expected).hasCauseThat().isSameInstanceAs(cause);
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}
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}
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@GwtIncompatible // Throwables.getCauseAs(Throwable, Class)
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public void testGetCauseAs() {
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SomeCheckedException cause = new SomeCheckedException();
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SomeChainingException thrown = new SomeChainingException(cause);
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assertThat(thrown).hasCauseThat().isSameInstanceAs(cause);
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assertThat(Throwables.getCauseAs(thrown, SomeCheckedException.class)).isSameInstanceAs(cause);
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assertThat(Throwables.getCauseAs(thrown, Exception.class)).isSameInstanceAs(cause);
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try {
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Throwables.getCauseAs(thrown, IllegalStateException.class);
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fail("Should have thrown CCE");
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} catch (ClassCastException expected) {
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assertThat(expected).hasCauseThat().isSameInstanceAs(thrown);
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}
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}
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@AndroidIncompatible // No getJavaLangAccess in Android (at least not in the version we use).
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@GwtIncompatible // lazyStackTraceIsLazy()
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public void testLazyStackTraceWorksInProd() {
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// TODO(b/64442212): Remove this guard once lazyStackTrace() works in Java 9+.
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Integer javaVersion = Ints.tryParse(JAVA_SPECIFICATION_VERSION.value());
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if (javaVersion != null && javaVersion >= 9) {
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return;
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}
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// Obviously this isn't guaranteed in every environment, but it works well enough for now:
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assertTrue(lazyStackTraceIsLazy());
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}
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@GwtIncompatible // lazyStackTrace(Throwable)
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|
public void testLazyStackTrace() {
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|
Exception e = new Exception();
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StackTraceElement[] originalStackTrace = e.getStackTrace();
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assertThat(lazyStackTrace(e)).containsExactly((Object[]) originalStackTrace).inOrder();
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|
|
|
try {
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|
lazyStackTrace(e).set(0, null);
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|
fail();
|
|
} catch (UnsupportedOperationException expected) {
|
|
}
|
|
|
|
// Now we test a property that holds only for the lazy implementation.
|
|
|
|
if (!lazyStackTraceIsLazy()) {
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|
return;
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|
}
|
|
|
|
e.setStackTrace(new StackTraceElement[0]);
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|
assertThat(lazyStackTrace(e)).containsExactly((Object[]) originalStackTrace).inOrder();
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|
}
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|
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@GwtIncompatible // lazyStackTrace
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|
private void doTestLazyStackTraceFallback() {
|
|
assertFalse(lazyStackTraceIsLazy());
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|
|
|
Exception e = new Exception();
|
|
|
|
assertThat(lazyStackTrace(e)).containsExactly((Object[]) e.getStackTrace()).inOrder();
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|
|
|
try {
|
|
lazyStackTrace(e).set(0, null);
|
|
fail();
|
|
} catch (UnsupportedOperationException expected) {
|
|
}
|
|
|
|
e.setStackTrace(new StackTraceElement[0]);
|
|
assertThat(lazyStackTrace(e)).isEmpty();
|
|
}
|
|
|
|
@GwtIncompatible // NullPointerTester
|
|
public void testNullPointers() {
|
|
new NullPointerTester().testAllPublicStaticMethods(Throwables.class);
|
|
}
|
|
}
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