6956638: JavacTask.generate does not generate all required files

Reviewed-by: darcy
Contributed-by: joshuamaurice@gmail.com

test/tools/javac/T6956638.java

+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.lang.model.element.Element;
+import javax.tools.DiagnosticCollector;
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+
+import com.sun.source.tree.CompilationUnitTree;
+import com.sun.source.util.JavacTask;
+
+/**
+ * @test
+ * @bug 6956638
+ * @summary JavacTask.generate does not generate all required files
+ */
+public class T6956638 {
+    public static void main(String[] args) throws Exception {
+        new T6956638().run();
+    }
+
+    void run() throws Exception {
+        File srcDir = new File("src");
+
+        File[] files = {
+            writeFile(new File(srcDir, "T1.java"),
+                "public class T1 extends T2 {}\n"),
+            writeFile(new File(srcDir, "T2.java"),
+                "public class T2 extends T3 {}\n"),
+            writeFile(new File(srcDir, "T3.java"),
+                "public class T3 { public static final int C = 1; }\n"),
+            writeFile(new File(srcDir, "Test.java"),
+                "public class Test { public static final int D = T1.C; }\n")
+        };
+
+        for (File f1: files) {
+            for (File f2: files) {
+                if (f2 == f1) continue;
+                for (File f3: files) {
+                    if (f3 == f2 || f3 == f1) continue;
+                    for (File f4: files) {
+                        if (f4 == f3 || f4 == f2 || f4 == f1) continue;
+                        try {
+                            test(f1, f2, f3, f4);
+                        } catch (Exception e) {
+                            error(e);
+                        }
+                    }
+                }
+            }
+        }
+
+        if (errors > 0)
+            throw new Exception(errors + " tests failed");
+    }
+
+    void test(File... sourceFiles) throws Exception {
+        System.err.println("Test " + (++count) + ": " + Arrays.asList(sourceFiles));
+
+        File classesDir = new File("classes" + count);
+        classesDir.mkdirs();
+
+        StringWriter compilerOutputStream = new StringWriter();
+
+        List<String> compileOptions = Arrays.asList("-d", classesDir.getPath());
+        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
+        DiagnosticCollector<JavaFileObject> diagnosticCollector = new DiagnosticCollector<JavaFileObject>();
+        StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnosticCollector, null, null);
+        Iterable<? extends JavaFileObject> sourceFileObjects = fileManager.getJavaFileObjects(sourceFiles);
+        System.err.println("1- javac given java source JavaFileObjects " + sourceFileObjects);
+        JavaCompiler.CompilationTask task = compiler.getTask(compilerOutputStream, fileManager, null, compileOptions, null, sourceFileObjects);
+        JavacTask javacTask = (JavacTask) task;
+
+        Iterable<? extends CompilationUnitTree> parsedTrees = javacTask.parse();
+        Iterable<? extends Element> analyzedTrees = javacTask.analyze();
+        Iterable<? extends JavaFileObject> generatedFiles = javacTask.generate();
+
+        System.err.println("2- parsed:" + size(parsedTrees) + " analysed:" + size(analyzedTrees) + " generated:" + size(generatedFiles));
+
+        System.err.print("3-");
+        for (JavaFileObject f : generatedFiles)
+            System.err.print(" " + f);
+        System.err.println("");
+
+        System.err.print("5-");
+        for (File f : classesDir.listFiles())
+            System.err.print(" " + f);
+        System.err.println("");
+
+        System.err.println("----");
+        System.err.println(compilerOutputStream.toString());
+
+        if (size(generatedFiles) != size(parsedTrees)) {
+            throw new Exception("wrong number of files generated: " + size(generatedFiles)
+                    + " expected: " + size(parsedTrees));
+        }
+    }
+
+    private void error(Throwable t) {
+        t.printStackTrace();
+        errors++;
+    }
+
+    int count;
+    int errors;
+
+    private static <E> int size(Iterable<E> x) {
+        int n = 0;
+        for (Iterator<E> iter = x.iterator(); iter.hasNext(); ++n)
+            iter.next();
+        return n;
+    }
+
+    private static File writeFile(File f, String str) throws IOException {
+        f.getParentFile().mkdirs();
+        BufferedWriter fout = new BufferedWriter(new FileWriter(f));
+        try {
+            fout.write(str);
+            fout.flush();
+        } finally {
+            fout.close();
+        }
+        return f;
+    }
+}