| /* |
| * Copyright 2014 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.junit.client.GWTTestCase; |
| |
| /** |
| * A helper test to capture native stack traces from browsers via exception error message. |
| */ |
| public class StackTraceGenerator extends GWTTestCase { |
| |
| @Override |
| public String getModuleName() { |
| return "com.google.gwt.core.StackTraceNative"; |
| } |
| |
| public void testPrintStackTrace() { |
| assertEquals("Intentionally failed to print stack trace", "fail", getTrace(3)); |
| } |
| |
| private String getTrace(int count) { |
| return count > 1 ? getTrace(count - 1) : getTraceNative(); |
| } |
| |
| private static native String getTraceNative() /*-{ |
| function native1() { |
| return native2(); |
| } |
| function native2() { |
| try { |
| null.a(); |
| return null; // Shouldn't be reached |
| } catch (e) { |
| return e.stack; |
| } |
| } |
| return (function() {return native1();})(); |
| }-*/; |
| } |