Mon, 03 May 2010 17:12:59 -0700
6943289: Project Coin: Improved Exception Handling for Java (aka 'multicatch')
Reviewed-by: jjg, darcy
duke@1 | 1 | /* |
duke@1 | 2 | * Copyright 2004-2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@1 | 4 | * |
duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@1 | 7 | * published by the Free Software Foundation. |
duke@1 | 8 | * |
duke@1 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@1 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@1 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@1 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@1 | 13 | * accompanied this code). |
duke@1 | 14 | * |
duke@1 | 15 | * You should have received a copy of the GNU General Public License version |
duke@1 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@1 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@1 | 18 | * |
duke@1 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@1 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@1 | 21 | * have any questions. |
duke@1 | 22 | */ |
duke@1 | 23 | |
duke@1 | 24 | |
duke@1 | 25 | import java.lang.reflect.Method; |
duke@1 | 26 | import java.util.*; |
duke@1 | 27 | import com.sun.mirror.apt.*; |
duke@1 | 28 | |
duke@1 | 29 | |
duke@1 | 30 | /** |
duke@1 | 31 | * Annotation processor for the @Test annotation. |
duke@1 | 32 | * Invokes each method so annotated, and verifies the result. |
duke@1 | 33 | * Throws an Error on failure. |
duke@1 | 34 | * |
duke@1 | 35 | * @author Scott Seligman |
duke@1 | 36 | */ |
duke@1 | 37 | public class TestProcessor implements AnnotationProcessor { |
duke@1 | 38 | |
duke@1 | 39 | AnnotationProcessorEnvironment env; |
duke@1 | 40 | |
duke@1 | 41 | // The tester that's running. |
duke@1 | 42 | Tester tester = Tester.activeTester; |
duke@1 | 43 | |
duke@1 | 44 | TestProcessor(AnnotationProcessorEnvironment env, |
duke@1 | 45 | Tester tester) { |
duke@1 | 46 | this.env = env; |
duke@1 | 47 | this.tester = tester; |
duke@1 | 48 | } |
duke@1 | 49 | |
duke@1 | 50 | |
duke@1 | 51 | /** |
duke@1 | 52 | * Reflectively invoke the @Test-annotated methods of the live |
duke@1 | 53 | * tester. Those methods perform the actual exercising of the |
duke@1 | 54 | * mirror API. Then back here to verify the results by |
duke@1 | 55 | * reading the live annotations. Convoluted, you say? |
duke@1 | 56 | */ |
duke@1 | 57 | public void process() { |
duke@1 | 58 | System.out.printf("\n> Processing %s\n", tester.getClass()); |
duke@1 | 59 | |
duke@1 | 60 | boolean failed = false; // true if a test returns wrong result |
duke@1 | 61 | |
duke@1 | 62 | for (Method m : tester.getClass().getDeclaredMethods()) { |
duke@1 | 63 | Test anno = m.getAnnotation(Test.class); |
duke@1 | 64 | Ignore ignore = m.getAnnotation(Ignore.class); |
duke@1 | 65 | if (anno != null) { |
duke@1 | 66 | if (ignore == null) { |
duke@1 | 67 | System.out.println(">> Invoking test " + m.getName()); |
duke@1 | 68 | Object result; |
duke@1 | 69 | try { |
duke@1 | 70 | result = m.invoke(tester); |
duke@1 | 71 | } catch (Exception e) { |
duke@1 | 72 | throw new Error("Test invocation failed", e); |
duke@1 | 73 | } |
duke@1 | 74 | boolean ok = true; // result of this test |
duke@1 | 75 | if (Collection.class.isAssignableFrom(m.getReturnType())) { |
duke@1 | 76 | ok = verifyResults((Collection) result, |
duke@1 | 77 | anno.result(), anno.ordered()); |
duke@1 | 78 | } else if (m.getReturnType() != void.class) { |
duke@1 | 79 | ok = verifyResult(result, anno.result()); |
duke@1 | 80 | } |
duke@1 | 81 | if (!ok) { |
duke@1 | 82 | System.out.println(">>> Expected: " + anno); |
duke@1 | 83 | System.out.println(">>> Got: " + result); |
duke@1 | 84 | failed = true; |
duke@1 | 85 | } |
duke@1 | 86 | } else { |
duke@1 | 87 | System.out.println(">> Ignoring test " + m.getName()); |
duke@1 | 88 | if (ignore.value().length() > 0) { |
duke@1 | 89 | System.out.println(">>> Reason: " + ignore.value()); |
duke@1 | 90 | } |
duke@1 | 91 | } |
duke@1 | 92 | } |
duke@1 | 93 | } |
duke@1 | 94 | if (failed) { |
duke@1 | 95 | throw new Error("Test(s) returned unexpected result"); |
duke@1 | 96 | } |
duke@1 | 97 | } |
duke@1 | 98 | |
duke@1 | 99 | /** |
duke@1 | 100 | * Verify that a single-valued (non-Collection) result matches |
duke@1 | 101 | * its expected value. |
duke@1 | 102 | */ |
duke@1 | 103 | private boolean verifyResult(Object result, String[] expected) { |
duke@1 | 104 | assert expected.length == 1 : |
duke@1 | 105 | "Single-valued test expecting " + expected.length + " results"; |
duke@1 | 106 | return expected[0].equals(String.valueOf(result)); |
duke@1 | 107 | } |
duke@1 | 108 | |
duke@1 | 109 | /** |
duke@1 | 110 | * Verify that a multi-valued result (a Collection) matches |
duke@1 | 111 | * its expected values. |
duke@1 | 112 | */ |
duke@1 | 113 | private boolean verifyResults(Collection result, |
duke@1 | 114 | String[] expected, boolean ordered) { |
duke@1 | 115 | if (result.size() != expected.length) { |
duke@1 | 116 | return false; |
duke@1 | 117 | } |
duke@1 | 118 | |
duke@1 | 119 | // Convert result to an array of strings. |
duke@1 | 120 | String[] res = new String[result.size()]; |
duke@1 | 121 | int i = 0; |
duke@1 | 122 | for (Object e : result) { |
duke@1 | 123 | res[i++] = String.valueOf(e); |
duke@1 | 124 | } |
duke@1 | 125 | |
duke@1 | 126 | if (!ordered) { |
duke@1 | 127 | Arrays.sort(res); |
duke@1 | 128 | Arrays.sort(expected); |
duke@1 | 129 | } |
duke@1 | 130 | return Arrays.equals(res, expected); |
duke@1 | 131 | } |
duke@1 | 132 | } |