/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed 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 libcore.java.lang;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Arrays;
import junit.framework.TestCase;
import libcore.util.SerializationTester;
public class ThrowableTest extends TestCase {
private static class NoStackTraceException extends Exception {
@Override
public synchronized Throwable fillInStackTrace() {
return null;
}
}
public void testNullStackTrace() {
try {
throw new NoStackTraceException();
} catch (NoStackTraceException ex) {
// We used to throw NullPointerException when printing an exception with no stack trace.
ex.printStackTrace(new PrintWriter(new StringWriter()));
}
}
private static class SuppressionsThrowable extends Throwable {
public SuppressionsThrowable(String detailMessage, Throwable throwable,
boolean enableSuppression) {
super(detailMessage, throwable, enableSuppression);
}
}
public void testAddSuppressed() {
Throwable throwable = new Throwable();
assertSuppressed(throwable);
Throwable suppressedA = new Throwable();
throwable.addSuppressed(suppressedA);
assertSuppressed(throwable, suppressedA);
Throwable suppressedB = new Throwable();
throwable.addSuppressed(suppressedB);
assertSuppressed(throwable, suppressedA, suppressedB);
}
public void testAddDuplicateSuppressed() {
Throwable throwable = new Throwable();
Throwable suppressedA = new Throwable();
throwable.addSuppressed(suppressedA);
throwable.addSuppressed(suppressedA);
throwable.addSuppressed(suppressedA);
assertSuppressed(throwable, suppressedA, suppressedA, suppressedA);
}
public void testGetSuppressedReturnsCopy() {
Throwable throwable = new Throwable();
Throwable suppressedA = new Throwable();
Throwable suppressedB = new Throwable();
throwable.addSuppressed(suppressedA);
throwable.addSuppressed(suppressedB);
Throwable[] mutable = throwable.getSuppressed();
mutable[0] = null;
mutable[1] = null;
assertSuppressed(throwable, suppressedA, suppressedB);
}
public void testAddSuppressedWithSuppressionDisabled() {
Throwable throwable = new SuppressionsThrowable("foo", null, false);
assertSuppressed(throwable);
throwable.addSuppressed(new Throwable());
assertSuppressed(throwable);
throwable.addSuppressed(new Throwable());
assertSuppressed(throwable);
}
public void testAddSuppressedSelf() {
Throwable throwable = new Throwable();
try {
throwable.addSuppressed(throwable);
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testAddSuppressedNull() {
Throwable throwable = new Throwable();
try {
throwable.addSuppressed(null);
fail();
} catch (NullPointerException expected) {
}
}
public void testPrintStackTraceWithCause() {
Throwable throwable = newThrowable("Throwable", "A", "B");
throwable.initCause(newThrowable("Cause", "A", "B", "C", "D"));
assertEquals("java.lang.Throwable: Throwable\n"
+ "\tat ClassB.doB(ClassB.java:1)\n"
+ "\tat ClassA.doA(ClassA.java:0)\n"
+ "Caused by: java.lang.Throwable: Cause\n"
+ "\tat ClassD.doD(ClassD.java:3)\n"
+ "\tat ClassC.doC(ClassC.java:2)\n"
+ "\t... 2 more\n", printStackTraceToString(throwable));
}
public void testPrintStackTraceWithCauseAndSuppressed() {
Throwable throwable = newThrowable("Throwable", "A", "B");
throwable.initCause(newThrowable("Cause", "A", "B", "C", "D"));
throwable.addSuppressed(newThrowable("Suppressed", "A", "B", "E", "F"));
throwable.addSuppressed(newThrowable("Suppressed", "A", "B", "G", "H"));
assertEquals("java.lang.Throwable: Throwable\n"
+ "\tat ClassB.doB(ClassB.java:1)\n"
+ "\tat ClassA.doA(ClassA.java:0)\n"
+ "\tSuppressed: java.lang.Throwable: Suppressed\n"
+ "\t\tat ClassF.doF(ClassF.java:3)\n"
+ "\t\tat ClassE.doE(ClassE.java:2)\n"
+ "\t\t... 2 more\n"
+ "\tSuppressed: java.lang.Throwable: Suppressed\n"
+ "\t\tat ClassH.doH(ClassH.java:3)\n"
+ "\t\tat ClassG.doG(ClassG.java:2)\n"
+ "\t\t... 2 more\n"
+ "Caused by: java.lang.Throwable: Cause\n"
+ "\tat ClassD.doD(ClassD.java:3)\n"
+ "\tat ClassC.doC(ClassC.java:2)\n"
+ "\t... 2 more\n", printStackTraceToString(throwable));
}
public void testPrintStackTraceWithEverything() {
Throwable throwable = newThrowable("Throwable", "A", "B");
Throwable cause = newThrowable("Cause", "A", "B", "C", "D");
Throwable suppressed = newThrowable("Suppressed", "A", "B", "E", "F");
throwable.addSuppressed(suppressed);
suppressed.addSuppressed(newThrowable("Suppressed/Suppressed", "A", "B", "E", "G"));
suppressed.initCause(newThrowable("Suppressed/Cause", "A", "B", "E", "H"));
throwable.initCause(cause);
cause.addSuppressed(newThrowable("Cause/Suppressed", "A", "B", "C", "I"));
cause.initCause(newThrowable("Cause/Cause", "A", "B", "C", "J"));
assertEquals("java.lang.Throwable: Throwable\n"
+ "\tat ClassB.doB(ClassB.java:1)\n"
+ "\tat ClassA.doA(ClassA.java:0)\n"
+ "\tSuppressed: java.lang.Throwable: Suppressed\n"
+ "\t\tat ClassF.doF(ClassF.java:3)\n"
+ "\t\tat ClassE.doE(ClassE.java:2)\n"
+ "\t\t... 2 more\n"
+ "\t\tSuppressed: java.lang.Throwable: Suppressed/Suppressed\n"
+ "\t\t\tat ClassG.doG(ClassG.java:3)\n"
+ "\t\t\t... 3 more\n"
+ "\tCaused by: java.lang.Throwable: Suppressed/Cause\n"
+ "\t\tat ClassH.doH(ClassH.java:3)\n"
+ "\t\t... 3 more\n"
+ "Caused by: java.lang.Throwable: Cause\n"
+ "\tat ClassD.doD(ClassD.java:3)\n"
+ "\tat ClassC.doC(ClassC.java:2)\n"
+ "\t... 2 more\n"
+ "\tSuppressed: java.lang.Throwable: Cause/Suppressed\n"
+ "\t\tat ClassI.doI(ClassI.java:3)\n"
+ "\t\t... 3 more\n"
+ "Caused by: java.lang.Throwable: Cause/Cause\n"
+ "\tat ClassJ.doJ(ClassJ.java:3)\n"
+ "\t... 3 more\n", printStackTraceToString(throwable));
}
public void testSetStackTraceWithNullElement() {
Throwable throwable = new Throwable();
try {
throwable.setStackTrace(new StackTraceElement[]{ null });
fail();
} catch (NullPointerException expected) {
}
}
public void testCauseSerialization() {
String s = "aced0005737200136a6176612e6c616e672e5468726f7761626c65d5c635273977b8cb0300034c0"
+ "00563617573657400154c6a6176612f6c616e672f5468726f7761626c653b4c000d64657461696c4"
+ "d6573736167657400124c6a6176612f6c616e672f537472696e673b5b000a737461636b547261636"
+ "574001e5b4c6a6176612f6c616e672f537461636b5472616365456c656d656e743b78707371007e0"
+ "00071007e000574000543617573657572001e5b4c6a6176612e6c616e672e537461636b547261636"
+ "5456c656d656e743b02462a3c3cfd22390200007870000000047372001b6a6176612e6c616e672e5"
+ "37461636b5472616365456c656d656e746109c59a2636dd8502000449000a6c696e654e756d62657"
+ "24c000e6465636c6172696e67436c61737371007e00024c000866696c654e616d6571007e00024c0"
+ "00a6d6574686f644e616d6571007e0002787000000003740006436c6173734474000b436c6173734"
+ "42e6a617661740003646f447371007e000900000002740006436c6173734374000b436c617373432"
+ "e6a617661740003646f437371007e000900000001740006436c6173734274000b436c617373422e6"
+ "a617661740003646f427371007e000900000000740006436c6173734174000b436c617373412e6a6"
+ "17661740003646f41787400095468726f7761626c657571007e0007000000027371007e000900000"
+ "001740006436c6173734274000b436c617373422e6a617661740003646f427371007e00090000000"
+ "0740006436c6173734174000b436c617373412e6a617661740003646f4178";
Throwable throwable = newThrowable("Throwable", "A", "B");
throwable.initCause(newThrowable("Cause", "A", "B", "C", "D"));
assertSerialized(throwable, s);
}
public void testSuppressedSerialization() {
String s = "aced0005737200136a6176612e6c616e672e5468726f7761626c65d5c635273977b8cb0300044c0"
+ "00563617573657400154c6a6176612f6c616e672f5468726f7761626c653b4c000d64657461696c4"
+ "d6573736167657400124c6a6176612f6c616e672f537472696e673b5b000a737461636b547261636"
+ "574001e5b4c6a6176612f6c616e672f537461636b5472616365456c656d656e743b4c00147375707"
+ "0726573736564457863657074696f6e737400104c6a6176612f7574696c2f4c6973743b787071007"
+ "e000574000a53657269616c697a65647572001e5b4c6a6176612e6c616e672e537461636b5472616"
+ "365456c656d656e743b02462a3c3cfd22390200007870000000027372001b6a6176612e6c616e672"
+ "e537461636b5472616365456c656d656e746109c59a2636dd8502000449000a6c696e654e756d626"
+ "5724c000e6465636c6172696e67436c61737371007e00024c000866696c654e616d6571007e00024"
+ "c000a6d6574686f644e616d6571007e0002787000000001740006436c6173734274000b436c61737"
+ "3422e6a617661740003646f427371007e000900000000740006436c6173734174000b436c6173734"
+ "12e6a617661740003646f41737200136a6176612e7574696c2e41727261794c6973747881d21d99c"
+ "7619d03000149000473697a657870000000017704000000017371007e000071007e001474000a537"
+ "570707265737365647571007e0007000000047371007e000900000003740006436c6173734474000"
+ "b436c617373442e6a617661740003646f447371007e000900000002740006436c6173734374000b4"
+ "36c617373432e6a617661740003646f437371007e000900000001740006436c6173734274000b436"
+ "c617373422e6a617661740003646f427371007e000900000000740006436c6173734174000b436c6"
+ "17373412e6a617661740003646f41737200266a6176612e7574696c2e436f6c6c656374696f6e732"
+ "4556e6d6f6469666961626c654c697374fc0f2531b5ec8e100200014c00046c69737471007e00047"
+ "872002c6a6176612e7574696c2e436f6c6c656374696f6e7324556e6d6f6469666961626c65436f6"
+ "c6c656374696f6e19420080cb5ef71e0200014c0001637400164c6a6176612f7574696c2f436f6c6"
+ "c656374696f6e3b78707371007e0012000000007704000000007871007e002b787878";
Throwable throwable = newThrowable("Serialized", "A", "B");
throwable.addSuppressed(newThrowable("Suppressed", "A", "B", "C", "D"));
assertSerialized(throwable, s);
}
public void testDisableSuppressionSerialization() {
String s = "aced0005737200356c6962636f72652e6a6176612e6c616e672e5468726f7761626c65546573742"
+ "45375707072657373696f6e735468726f7761626c6502cff43b5390d137020000787200136a61766"
+ "12e6c616e672e5468726f7761626c65d5c635273977b8cb0300044c000563617573657400154c6a6"
+ "176612f6c616e672f5468726f7761626c653b4c000d64657461696c4d6573736167657400124c6a6"
+ "176612f6c616e672f537472696e673b5b000a737461636b547261636574001e5b4c6a6176612f6c6"
+ "16e672f537461636b5472616365456c656d656e743b4c00147375707072657373656445786365707"
+ "4696f6e737400104c6a6176612f7574696c2f4c6973743b787070740003666f6f7572001e5b4c6a6"
+ "176612e6c616e672e537461636b5472616365456c656d656e743b02462a3c3cfd223902000078700"
+ "00000007078";
Throwable throwable = new SuppressionsThrowable("foo", null, false);
throwable.setStackTrace(new StackTraceElement[0]);
new SerializationTester<Throwable>(throwable, s) {
@Override protected boolean equals(Throwable a, Throwable b) {
return printStackTraceToString(a).equals(printStackTraceToString(b));
}
@Override protected void verify(Throwable deserialized) {
// the suppressed exception is silently discarded
deserialized.addSuppressed(newThrowable("Suppressed"));
assertSuppressed(deserialized);
}
}.test();
}
public void testEnableSuppressionSerialization() {
String s = "aced0005737200356c6962636f72652e6a6176612e6c616e672e5468726f7761626c65546573742"
+ "45375707072657373696f6e735468726f7761626c6502cff43b5390d137020000787200136a61766"
+ "12e6c616e672e5468726f7761626c65d5c635273977b8cb0300044c000563617573657400154c6a6"
+ "176612f6c616e672f5468726f7761626c653b4c000d64657461696c4d6573736167657400124c6a6"
+ "176612f6c616e672f537472696e673b5b000a737461636b547261636574001e5b4c6a6176612f6c6"
+ "16e672f537461636b5472616365456c656d656e743b4c00147375707072657373656445786365707"
+ "4696f6e737400104c6a6176612f7574696c2f4c6973743b787070740003666f6f7572001e5b4c6a6"
+ "176612e6c616e672e537461636b5472616365456c656d656e743b02462a3c3cfd223902000078700"
+ "0000000737200266a6176612e7574696c2e436f6c6c656374696f6e7324556e6d6f6469666961626"
+ "c654c697374fc0f2531b5ec8e100200014c00046c69737471007e00057872002c6a6176612e75746"
+ "96c2e436f6c6c656374696f6e7324556e6d6f6469666961626c65436f6c6c656374696f6e1942008"
+ "0cb5ef71e0200014c0001637400164c6a6176612f7574696c2f436f6c6c656374696f6e3b7870737"
+ "200136a6176612e7574696c2e41727261794c6973747881d21d99c7619d03000149000473697a657"
+ "870000000007704000000007871007e000f78";
Throwable throwable = new SuppressionsThrowable("foo", null, true);
throwable.setStackTrace(new StackTraceElement[0]);
new SerializationTester<Throwable>(throwable, s) {
@Override protected boolean equals(Throwable a, Throwable b) {
return printStackTraceToString(a).equals(printStackTraceToString(b));
}
@Override protected void verify(Throwable deserialized) {
// the suppressed exception is permitted
Throwable suppressed = newThrowable("Suppressed");
deserialized.addSuppressed(suppressed);
assertSuppressed(deserialized, suppressed);
}
}.test();
}
private void assertSerialized(final Throwable throwable, String golden) {
new SerializationTester<Throwable>(throwable, golden) {
@Override protected boolean equals(Throwable a, Throwable b) {
return printStackTraceToString(a).equals(printStackTraceToString(b));
}
}.test();
}
private Throwable newThrowable(String message, String... stackTraceElements) {
StackTraceElement[] array = new StackTraceElement[stackTraceElements.length];
for (int i = 0; i < stackTraceElements.length; i++) {
String s = stackTraceElements[i];
array[stackTraceElements.length - 1 - i]
= new StackTraceElement("Class" + s, "do" + s, "Class" + s + ".java", i);
}
Throwable result = new Throwable(message);
result.setStackTrace(array);
return result;
}
private String printStackTraceToString(Throwable throwable) {
StringWriter writer = new StringWriter();
throwable.printStackTrace(new PrintWriter(writer));
return writer.toString();
}
private void assertSuppressed(Throwable throwable, Throwable... expectedSuppressed) {
assertEquals(Arrays.asList(throwable.getSuppressed()), Arrays.asList(expectedSuppressed));
}
}