/*
* Copyright 2009 Google Inc.
*
* 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 com.google.gwt.core.client.impl;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptException;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.core.client.impl.StackTraceCreator.CollectorChrome;
import com.google.gwt.junit.client.GWTTestCase;
/**
* Tests StackTraceCreator in Production Mode. The methods in this test class
* are static so that their names can be reliably determined in Production Mode.
*/
public class StackTraceCreatorTest extends GWTTestCase {
public static void testJavaScriptException() {
JsArrayString start = sample();
Throwable t = null;
try {
throwNative();
fail("No exception thrown");
} catch (JavaScriptException e) {
/*
* Some browsers may or may not be able to implement this at all, so we'll
* at least make sure that an array is returned;
*/
assertNotNull(e.getStackTrace());
if (e.getStackTrace().length == 0) {
assertTrue("Development Mode", GWT.isScript());
return;
} else {
t = e;
}
}
String myName = null;
if (!GWT.isScript()) {
myName = "testJavaScriptException";
} else {
myName = Impl.getNameOf("@com.google.gwt.core.client.impl.StackTraceCreatorTest::testJavaScriptException()");
}
checkStack(myName, t);
JsArrayString end = sample();
assertEquals(start, end);
}
/**
* Just make sure that reentrant behavior doesn't fail.
*/
public static void testReentrantCalls() {
if (!GWT.isScript()) {
// sample is useless in Development Mode
return;
}
JsArrayString start = sample();
JsArrayString stack = countDown(5);
assertNotNull(stack);
assertTrue(stack.length() > 0);
JsArrayString end = sample();
assertEquals(start, end);
}
public static void testStackTraces() {
JsArrayString start = sample();
Throwable t;
try {
throw new RuntimeException();
} catch (Throwable t2) {
t = t2;
}
String myName = null;
if (!GWT.isScript()) {
myName = "testStackTraces";
} else {
myName = Impl.getNameOf("@com.google.gwt.core.client.impl.StackTraceCreatorTest::testStackTraces()");
}
checkStack(myName, t);
JsArrayString end = sample();
assertEquals(start, end);
}
private static void assertEquals(JsArrayString start, JsArrayString end) {
assertEquals("length", start.length(), end.length());
for (int i = 0, j = start.length(); i < j; i++) {
assertEquals("frame " + i, start.get(i), end.get(i));
}
}
private static void checkStack(String myName, Throwable t) {
assertNotNull("myName", myName);
assertNotNull("t", t);
assertEquals("Needs a trim()", myName.trim(), myName);
assertFalse("function", myName.startsWith("function"));
assertFalse("(", myName.contains("("));
StackTraceElement[] stack = t.getStackTrace();
assertNotNull("stack", stack);
assertTrue("stack.length", stack.length > 0);
boolean found = false;
StringBuilder observedStack = new StringBuilder();
for (int i = 0, j = stack.length; i < j; i++) {
StackTraceElement elt = stack[i];
String value = elt.getMethodName();
assertNotNull("value", value);
assertTrue("value.length", value.length() > 0);
assertEquals("value.trim()", value.length(), value.trim().length());
observedStack.append("\n").append(value);
found |= myName.equals(value);
}
assertTrue("Did not find " + myName + " in the stack " + observedStack,
found);
}
private static JsArrayString countDown(int count) {
if (count > 0) {
return countDown(count - 1);
} else {
return sample();
}
}
private static JsArrayString sample() {
if (GWT.isScript()) {
return StackTraceCreator.createStackTrace();
} else {
return JavaScriptObject.createArray().cast();
}
}
private static native void throwNative() /*-{
null.a();
}-*/;
@Override
public String getModuleName() {
return "com.google.gwt.core.Core";
}
public void testExtractName() {
assertEquals("anonymous",
StackTraceCreator.extractNameFromToString("function(){}"));
assertEquals("anonymous",
StackTraceCreator.extractNameFromToString("function (){}"));
assertEquals("anonymous",
StackTraceCreator.extractNameFromToString(" function (){}"));
assertEquals("anonymous",
StackTraceCreator.extractNameFromToString("function (){}"));
assertEquals("foo",
StackTraceCreator.extractNameFromToString("function foo(){}"));
assertEquals("foo",
StackTraceCreator.extractNameFromToString("function foo (){}"));
assertEquals("foo",
StackTraceCreator.extractNameFromToString(" function foo (){}"));
}
public void testChromeExtractName() {
CollectorChrome c = new CollectorChrome();
assertEquals("anonymous@@file.js:1:2", c.extractName(" at file.js:1:2"));
assertEquals("functionName@@file.js:1:2",
c.extractName(" at functionName (file.js:1:2)"));
assertEquals("functionName@@file.js:1:2",
c.extractName(" at Type.functionName (file.js:1:2)"));
assertEquals("functionName@@file.js:1:2",
c.extractName(" at Type.functionName [as methodName] (file.js:1:2)"));
// iOS style
assertEquals("functionName@@file.js:1",
c.extractName("functionName@file.js:1"));
}
public void testFirefox14ExtractName() {
StackTraceCreator.CollectorMoz c = new StackTraceCreator.CollectorMoz();
assertEquals("anonymous", c.extractName("@file.js:1"));
assertEquals("functionName",
c.extractName("functionName@file.js:1"));
}
private native JavaScriptObject createException(String stackString) /*-{
var e = {};
e.stack = stackString;
return e;
}-*/;
public void testIosStack() {
// Taken from:
// Mozilla/5.0 (iPad; CPU OS 6_1 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko)
// Version/6.0 Mobile/10B141 Safari/8536.25
String stackString =
"$third@http://www.example.com/test/ABCD.cache.js:300\n" +
"$second@http://www.example.com/test/ABCD.cache.js:200\n" +
"$first@http://www.example.com/test/ABCD.cache.js:100\n" +
"$entry0@http://www.example.com/test/ABCD.cache.js:50\n" +
"@http://www.example.com/test/ABCD.cache.js:10\n" +
"@http://www.example.com/test/ABCD.cache.js:5\n" +
"[native code]";
JavaScriptObject e = createException(stackString);
StackTraceCreator.CollectorChrome c = new StackTraceCreator.CollectorChrome();
JsArrayString stack = c.inferFrom(e);
assertEquals(7, stack.length());
assertEquals("$third", stack.get(0).split("@@")[0]);
assertEquals("$entry0", stack.get(3).split("@@")[0]);
assertEquals("anonymous", stack.get(5).split("@@")[0]);
assertEquals("anonymous@@", stack.get(6));
}
public void testChromeStack() {
// Taken from:
// Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko)
// Chrome/25.0.1364.97 Safari/537.22
String stackString =
"TypeError: Cannot read property 'length' of undefined\n" +
" at $third (http://www.example.com/test/ABCD.cache.js:300:10)\n" +
" at $second (http://www.example.com/test/ABCD.cache.js:200:10)\n" +
" at $first (http://www.example.com/test/ABCD.cache.js:100:10)\n" +
" at $entry0 (http://www.example.com/test/ABCD.cache.js:50:10)";
JavaScriptObject e = createException(stackString);
StackTraceCreator.CollectorChrome c = new StackTraceCreator.CollectorChrome();
JsArrayString stack = c.inferFrom(e);
assertEquals(4, stack.length());
assertEquals("$third", stack.get(0).split("@@")[0]);
assertEquals("$entry0", stack.get(3).split("@@")[0]);
}
}