269 lines
9.7 KiB
Java
269 lines
9.7 KiB
Java
/*
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* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import com.sun.tools.javac.api.*;
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import com.sun.tools.javac.file.*;
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import java.io.*;
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import java.util.*;
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import javax.tools.*;
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// More general parameter limit testing framework, and designed so
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// that it could be expanded into a general limits-testing framework
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// in the future.
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public class NumArgsTest {
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private static final NumArgsTest.NestingDef[] NO_NESTING = {};
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// threshold is named as such because "threshold" args is expected
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// to pass, and "threshold" + 1 args is expected to fail.
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private final int threshold;
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private final boolean isStaticMethod;
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private final String result;
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private final String testName;
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private final String methodName;
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private final NestingDef[] nesting;
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private final File testdir;
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private final JavacTool tool = JavacTool.create();
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private final JavacFileManager fm =
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tool.getStandardFileManager(null, null, null);
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private int errors = 0;
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public NumArgsTest(final int threshold,
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final boolean isStaticMethod,
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final String result,
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final String methodName,
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final String testName,
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final NestingDef[] nesting) {
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this.threshold = threshold;
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this.isStaticMethod = isStaticMethod;
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this.result = result;
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this.methodName = methodName;
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this.testName = testName;
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this.nesting = nesting;
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testdir = new File(testName);
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testdir.mkdir();
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}
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public NumArgsTest(final int threshold,
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final boolean isStaticMethod,
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final String result,
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final String methodName,
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final String testName) {
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this(threshold, isStaticMethod, result, methodName,
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testName, NO_NESTING);
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}
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public NumArgsTest(final int threshold,
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final String result,
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final String methodName,
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final String testName,
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final NestingDef[] nesting) {
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this(threshold, false, result, methodName, testName, nesting);
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}
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public NumArgsTest(final int threshold,
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final String result,
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final String methodName,
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final String testName) {
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this(threshold, false, result, methodName, testName, NO_NESTING);
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}
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public NumArgsTest(final int threshold,
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final String testName,
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final NestingDef[] nesting) {
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this(threshold, null, null, testName, nesting);
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}
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public NumArgsTest(final int threshold,
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final String testName) {
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this(threshold, null, null, testName, NO_NESTING);
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}
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public NumArgsTest(final int threshold,
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final String testName,
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final String constructorName,
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final NestingDef[] nesting) {
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this(threshold, null, constructorName, testName, nesting);
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}
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protected void writeArgs(final int num, final PrintWriter stream)
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throws IOException {
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stream.print("int x1");
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for(int i = 1; i < num; i++)
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stream.print(", int x" + (i + 1));
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}
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protected void writeMethod(final int num,
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final String name,
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final PrintWriter stream)
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throws IOException {
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stream.write("public ");
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if (isStaticMethod) stream.write("static ");
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if (result == null)
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stream.write("");
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else {
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stream.write(result);
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stream.write(" ");
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}
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stream.write(name);
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stream.write("(");
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writeArgs(num, stream);
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stream.write(") {}\n");
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}
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protected void writeJavaFile(final int num,
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final boolean pass,
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final PrintWriter stream)
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throws IOException {
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final String fullName = testName + (pass ? "Pass" : "Fail");
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stream.write("public class ");
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stream.write(fullName);
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stream.write(" {\n");
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for(int i = 0; i < nesting.length; i++)
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nesting[i].writeBefore(stream);
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if (null == methodName)
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writeMethod(num, fullName, stream);
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else
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writeMethod(num, methodName, stream);
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for(int i = nesting.length - 1; i >= 0; i--)
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nesting[i].writeAfter(stream);
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stream.write("}\n");
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}
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public void runTest() throws Exception {
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// Run the pass test
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final String passTestName = testName + "Pass.java";
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final StringWriter passBody = new StringWriter();
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final PrintWriter passStream = new PrintWriter(passBody);
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final File passFile = new File(testdir, passTestName);
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final FileWriter passWriter = new FileWriter(passFile);
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writeJavaFile(threshold, true, passStream);
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passStream.close();
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passWriter.write(passBody.toString());
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passWriter.close();
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final StringWriter passSW = new StringWriter();
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final String[] passArgs = { passFile.toString() };
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final Iterable<? extends JavaFileObject> passFiles =
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fm.getJavaFileObjectsFromFiles(Arrays.asList(passFile));
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final JavaCompiler.CompilationTask passTask =
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tool.getTask(passSW, fm, null, null, null, passFiles);
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if (!passTask.call()) {
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errors++;
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System.err.println("Compilation unexpectedly failed. Body:\n" +
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passBody);
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System.err.println("Output:\n" + passSW.toString());
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}
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// Run the fail test
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final String failTestName = testName + "Fail.java";
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final StringWriter failBody = new StringWriter();
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final PrintWriter failStream = new PrintWriter(failBody);
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final File failFile = new File(testdir, failTestName);
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final FileWriter failWriter = new FileWriter(failFile);
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writeJavaFile(threshold + 1, false, failStream);
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failStream.close();
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failWriter.write(failBody.toString());
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failWriter.close();
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final StringWriter failSW = new StringWriter();
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final TestDiagnosticHandler failDiag =
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new TestDiagnosticHandler("compiler.err.limit.parameters");
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final Iterable<? extends JavaFileObject> failFiles =
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fm.getJavaFileObjectsFromFiles(Arrays.asList(failFile));
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final JavaCompiler.CompilationTask failTask =
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tool.getTask(failSW,
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tool.getStandardFileManager(null, null, null),
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failDiag,
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null,
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null,
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failFiles);
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if (failTask.call()) {
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errors++;
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System.err.println("Compilation unexpectedly succeeded.");
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System.err.println("Input:\n" + failBody);
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}
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if (!failDiag.sawError) {
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errors++;
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System.err.println("Did not see expected compile error.");
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}
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if (errors != 0)
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throw new RuntimeException("Test failed with " +
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errors + " errors");
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}
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public static NestingDef classNesting(final String name) {
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return new NestedClassBuilder(name, false);
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}
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public static NestingDef classNesting(final String name,
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final boolean isStatic) {
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return new NestedClassBuilder(name, isStatic);
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}
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protected interface NestingDef {
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public abstract void writeBefore(final PrintWriter stream);
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public abstract void writeAfter(final PrintWriter stream);
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}
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private static class NestedClassBuilder implements NestingDef {
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private final String name;
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private final boolean isStatic;
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public NestedClassBuilder(final String name, final boolean isStatic) {
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this.name = name;
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this.isStatic = isStatic;
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}
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public void writeBefore(final PrintWriter stream) {
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stream.write("public ");
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if (isStatic) stream.write("static");
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stream.write(" class ");
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stream.write(name);
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stream.write(" {\n");
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}
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public void writeAfter(final PrintWriter stream) {
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stream.write("}\n");
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}
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}
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public class TestDiagnosticHandler<T> implements DiagnosticListener<T> {
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public boolean sawError;
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public final String target;
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public TestDiagnosticHandler(final String target) {
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this.target = target;
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}
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public void report(final Diagnostic<? extends T> diag) {
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if (diag.getCode().equals(target))
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sawError = true;
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}
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}
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}
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