1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 import com.sun.tools.javac.main.Main;
25 import com.sun.tools.javac.util.*;
26 import java.io.*;
27 import javax.tools.JavaFileObject;
28
29 // More general parameter limit testing framework, and designed so
30 // that it could be expanded into a general limits-testing framework
31 // in the future.
32 public class NumArgsTest {
33
34 private int errors = 0;
35 private final int threshold;
36 private final String retty;
37 private final String testName;
38 private final String methodName;
39 private final NestingDef[] nesting;
40 private final File testdir;
41 private static Main compiler = new Main("javac");
42
43 public NumArgsTest(final int threshold,
44 final String retty,
45 final String methodName,
46 final String testName,
47 final NestingDef[] nesting) {
48 this.threshold = threshold;
49 this.retty = retty;
50 this.methodName = methodName;
51 this.testName = testName;
52 this.nesting = nesting;
53 testdir = new File(testName);
54 testdir.mkdir();
55 }
56
57 public NumArgsTest(final int threshold,
58 final String testName,
59 final NestingDef[] nesting) {
60 this(threshold, null, null, testName, nesting);
61 }
62
63 public NumArgsTest(final int threshold,
64 final String testName,
65 final String constructorName,
66 final NestingDef[] nesting) {
67 this(threshold, null, constructorName, testName, nesting);
68 }
69
70 protected void writeArgs(final int num, final PrintWriter stream)
71 throws IOException {
72 stream.print("int x1");
73 for(int i = 1; i < num; i++)
74 stream.print(", int x" + (i + 1));
75 }
76
77 protected void writeMethod(final int num,
78 final String name,
79 final PrintWriter stream)
80 throws IOException {
81 stream.write("public ");
82 if (retty == null)
83 stream.write("");
84 else {
85 stream.write(retty);
86 stream.write(" ");
87 }
88 stream.write(name);
89 stream.write("(");
90 writeArgs(num, stream);
91 stream.write(") {}\n");
92 }
93
94 protected void writeJavaFile(final int num,
95 final boolean pass,
96 final PrintWriter stream)
97 throws IOException {
98 final String fullName = testName + (pass ? "Pass" : "Fail");
99 stream.write("public class ");
100 stream.write(fullName);
101 stream.write(" {\n");
102 for(int i = 0; i < nesting.length; i++)
103 nesting[i].writeBefore(stream);
104 if (null == methodName)
105 writeMethod(num, fullName, stream);
106 else
107 writeMethod(num, methodName, stream);
108 for(int i = nesting.length - 1; i >= 0; i--)
109 nesting[i].writeAfter(stream);
110 stream.write("}\n");
111 }
112
113 public void runTest() throws Exception {
114 // Run the pass test
115 final String passTestName = testName + "Pass.java";
116 final StringWriter passBody = new StringWriter();
117 final PrintWriter passStream = new PrintWriter(passBody);
118 final File passFile = new File(testdir, passTestName);
119 final FileWriter passWriter = new FileWriter(passFile);
120
121 writeJavaFile(threshold, true, passStream);
122 passStream.close();
123 passWriter.write(passBody.toString());
124 passWriter.close();
125
126 final StringWriter passSW = new StringWriter();
127 final PrintWriter passPW = new PrintWriter(passSW);
128 final Main passCompiler = new Main("javac", passPW);
129 final Context passContext = new Context();
130 final Log passLog = Log.instance(passContext);
131 final TestDiagnosticHandler passDiag =
132 new TestDiagnosticHandler(passLog, "limit.parameters");
133 final String[] passArgs = { passFile.toString() };
134 final Main.Result passResult =
135 passCompiler.compile(passArgs, null, passContext,
136 List.<JavaFileObject>nil(), null, passLog);
137
138 passPW.close();
139
140 if(passResult.exitCode != 0) {
141 errors++;
142 System.err.println("Compilation unexpectedly failed. Body:\n" +
143 passBody);
144 System.err.println("Output:\n" + passSW.toString());
145 }
146
147 // Run the fail test
148 final String failTestName = testName + "Fail.java";
149 final StringWriter failBody = new StringWriter();
150 final PrintWriter failStream = new PrintWriter(failBody);
151 final File failFile = new File(testdir, failTestName);
152 final FileWriter failWriter = new FileWriter(failFile);
153
154 writeJavaFile(threshold + 1, false, failStream);
155 failStream.close();
156 failWriter.write(failBody.toString());
157 failWriter.close();
158
159 final StringWriter failSW = new StringWriter();
160 final PrintWriter failPW = new PrintWriter(failSW);
161 final Main failCompiler = new Main("javac", failPW);
162 final Context failContext = new Context();
163 final Log failLog = Log.instance(failContext);
164 final TestDiagnosticHandler failDiag =
165 new TestDiagnosticHandler(failLog, "compiler.err.limit.parameters");
166 final String[] failArgs = { failFile.toString() };
167 final Main.Result failResult =
168 failCompiler.compile(failArgs, null, failContext,
169 List.<JavaFileObject>nil(), null, failLog);
170
171 failPW.close();
172
173 if(failResult.exitCode == 0) {
174 errors++;
175 System.err.println("Compilation unexpectedly succeeded.");
176 System.err.println("Input:\n" + failBody);
177 }
178
179 if (!failDiag.sawError) {
180 errors++;
181 System.err.println("Did not see expected compile error.");
182 }
183
184 if (errors != 0)
185 throw new RuntimeException("Test failed with " +
186 errors + " errors");
187 }
188
189 public static NestingDef classNesting(final String name) {
190 return new ClassNestingDef(name, false);
191 }
192
193 public static NestingDef classNesting(final String name,
194 final boolean isStatic) {
195 return new ClassNestingDef(name, isStatic);
196 }
197
198 protected interface NestingDef {
199 public abstract void writeBefore(final PrintWriter stream);
200 public abstract void writeAfter(final PrintWriter stream);
201 }
202
203 private static class ClassNestingDef implements NestingDef {
204 private final String name;
205 private final boolean isStatic;
206 public ClassNestingDef(final String name, final boolean isStatic) {
207 this.name = name;
208 this.isStatic = isStatic;
209 }
210 public void writeBefore(final PrintWriter stream) {
211 stream.write("public ");
212 if (isStatic) stream.write("static");
213 stream.write(" class ");
214 stream.write(name);
215 stream.write(" {\n");
216 }
217 public void writeAfter(final PrintWriter stream) {
218 stream.write("}\n");
219 }
220 }
221
222 public class TestDiagnosticHandler extends Log.DiagnosticHandler {
223 public boolean sawError;
224 public final String target;
225
226 public TestDiagnosticHandler(final Log log, final String target) {
227 install(log);
228 this.target = target;
229 }
230
231 public void report(final JCDiagnostic diag) {
232 if (diag.getCode().equals(target))
233 sawError = true;
234 prev.report(diag);
235 }
236 }
237
238 }