langtools/test/tools/sjavac/SJavac.java
changeset 28538 48d009ddfd46
parent 28537 0a030920b0f5
parent 28293 ad51f784a352
child 28539 bb420dbad9d2
child 28975 a492b5c5dc53
--- a/langtools/test/tools/sjavac/SJavac.java	Tue Dec 30 22:13:53 2014 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,746 +0,0 @@
-/*
- * Copyright (c) 2013, 2014, 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.
- */
-
-
-/*
- * @test
- * @summary Test all aspects of sjavac.
- * @bug 8004658 8042441 8042699 8054461 8054474 8054465
- *
- * @build Wrapper
- * @run main Wrapper SJavac
- */
-
-import java.util.*;
-import java.io.*;
-import java.nio.file.*;
-import java.nio.file.attribute.*;
-import java.nio.charset.*;
-
-import com.sun.tools.sjavac.Main;
-
-public class SJavac {
-
-    public static void main(String... args) throws Exception {
-        try {
-            SJavac s = new SJavac();
-            s.test();
-        } finally {
-            System.out.println("\ntest complete\n");
-        }
-    }
-
-    FileSystem defaultfs = FileSystems.getDefault();
-    String serverArg = "--server:"
-            + "portfile=testportfile,"
-            + "background=false";
-
-    // Where to put generated sources that will
-    // test aspects of sjavac, ie JTWork/scratch/gensrc
-    Path gensrc;
-    // More gensrc dirs are used to test merging of serveral source roots.
-    Path gensrc2;
-    Path gensrc3;
-
-    // Where to put compiled classes.
-    Path bin;
-    // Where to put c-header files.
-    Path headers;
-
-    // Remember the previous bin and headers state here.
-    Map<String,Long> previous_bin_state;
-    Map<String,Long> previous_headers_state;
-
-    public void test() throws Exception {
-        gensrc = defaultfs.getPath("gensrc");
-        gensrc2 = defaultfs.getPath("gensrc2");
-        gensrc3 = defaultfs.getPath("gensrc3");
-        bin = defaultfs.getPath("bin");
-        headers = defaultfs.getPath("headers");
-
-        Files.createDirectory(gensrc);
-        Files.createDirectory(gensrc2);
-        Files.createDirectory(gensrc3);
-        Files.createDirectory(bin);
-        Files.createDirectory(headers);
-
-        initialCompile();
-        incrementalCompileNoChanges();
-        incrementalCompileDroppingClasses();
-        incrementalCompileWithChange();
-        incrementalCompileDropAllNatives();
-        incrementalCompileAddNative();
-        incrementalCompileChangeNative();
-        compileWithOverrideSource();
-        compileWithInvisibleSources();
-        compileCircularSources();
-        compileExcludingDependency();
-        incrementalCompileTestFullyQualifiedRef();
-        compileWithAtFile();
-        testStateDir();
-        testPermittedArtifact();
-
-        delete(gensrc);
-        delete(gensrc2);
-        delete(gensrc3);
-        delete(bin);
-        delete(headers);
-    }
-
-    void initialCompile() throws Exception {
-        System.out.println("\nInitial compile of gensrc.");
-        System.out.println("----------------------------");
-        populate(gensrc,
-            "alfa/omega/AINT.java",
-            "package alfa.omega; public interface AINT { void aint(); }",
-
-            "alfa/omega/A.java",
-            "package alfa.omega; public class A implements AINT { "+
-                 "public final static int DEFINITION = 17; public void aint() { } }",
-
-            "alfa/omega/AA.java",
-            "package alfa.omega;"+
-            "// A package private class, not contributing to the public api.\n"+
-            "class AA {"+
-            "   // A properly nested static inner class.\n"+
-            "    static class AAA { }\n"+
-            "    // A properly nested inner class.\n"+
-            "    class AAAA { }\n"+
-            "    Runnable foo() {\n"+
-            "        // A proper anonymous class.\n"+
-            "        return new Runnable() { public void run() { } };\n"+
-            "    }\n"+
-            "    AAA aaa;\n"+
-            "    AAAA aaaa;\n"+
-            "    AAAAA aaaaa;\n"+
-            "}\n"+
-            "class AAAAA {\n"+
-            "    // A bad auxiliary class, but no one is referencing it\n"+
-            "    // from outside of this source file, therefore it is ok.\n"+
-            "}\n",
-
-            "beta/BINT.java",
-            "package beta;public interface BINT { void foo(); }",
-
-            "beta/B.java",
-            "package beta; import alfa.omega.A; public class B {"+
-            "private int b() { return A.DEFINITION; } native void foo(); }");
-
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        previous_bin_state = collectState(bin);
-        previous_headers_state = collectState(headers);
-    }
-
-    void incrementalCompileNoChanges() throws Exception {
-        System.out.println("\nTesting that no change in sources implies no change in binaries.");
-        System.out.println("------------------------------------------------------------------");
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyEqual(new_bin_state, previous_bin_state);
-        Map<String,Long> new_headers_state = collectState(headers);
-        verifyEqual(previous_headers_state, new_headers_state);
-    }
-
-    void incrementalCompileDroppingClasses() throws Exception {
-        System.out.println("\nTesting that deleting AA.java deletes all");
-        System.out.println("generated inner class as well as AA.class");
-        System.out.println("-----------------------------------------");
-        removeFrom(gensrc, "alfa/omega/AA.java");
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenRemoved(previous_bin_state, new_bin_state,
-                                       "bin/alfa/omega/AA$1.class",
-                                       "bin/alfa/omega/AA$AAAA.class",
-                                       "bin/alfa/omega/AA$AAA.class",
-                                       "bin/alfa/omega/AAAAA.class",
-                                       "bin/alfa/omega/AA.class");
-
-        previous_bin_state = new_bin_state;
-        Map<String,Long> new_headers_state = collectState(headers);
-        verifyEqual(previous_headers_state, new_headers_state);
-    }
-
-    void incrementalCompileWithChange() throws Exception {
-        System.out.println("\nNow update the A.java file with a new timestamps and");
-        System.out.println("new final static definition. This should trigger a recompile,");
-        System.out.println("not only of alfa, but also beta.");
-        System.out.println("But check that the generated native header was not updated!");
-        System.out.println("Since we did not modify the native api of B.");
-        System.out.println("-------------------------------------------------------------");
-
-        populate(gensrc,"alfa/omega/A.java",
-                       "package alfa.omega; public class A implements AINT { "+
-                 "public final static int DEFINITION = 18; public void aint() { } private void foo() { } }");
-
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-
-        verifyNewerFiles(previous_bin_state, new_bin_state,
-                         "bin/alfa/omega/A.class",
-                         "bin/alfa/omega/AINT.class",
-                         "bin/beta/B.class",
-                         "bin/beta/BINT.class",
-                         "bin/javac_state");
-        previous_bin_state = new_bin_state;
-
-        Map<String,Long> new_headers_state = collectState(headers);
-        verifyEqual(new_headers_state, previous_headers_state);
-    }
-
-    void incrementalCompileDropAllNatives() throws Exception {
-        System.out.println("\nNow update the B.java file with one less native method,");
-        System.out.println("ie it has no longer any methods!");
-        System.out.println("Verify that beta_B.h is removed!");
-        System.out.println("---------------------------------------------------------");
-
-        populate(gensrc,"beta/B.java",
-                       "package beta; import alfa.omega.A; public class B {"+
-                       "private int b() { return A.DEFINITION; } }");
-
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyNewerFiles(previous_bin_state, new_bin_state,
-                         "bin/beta/B.class",
-                         "bin/beta/BINT.class",
-                         "bin/javac_state");
-        previous_bin_state = new_bin_state;
-
-        Map<String,Long> new_headers_state = collectState(headers);
-        verifyThatFilesHaveBeenRemoved(previous_headers_state, new_headers_state,
-                                       "headers/beta_B.h");
-        previous_headers_state = new_headers_state;
-    }
-
-    void incrementalCompileAddNative() throws Exception {
-        System.out.println("\nNow update the B.java file with a final static annotated with @Native.");
-        System.out.println("Verify that beta_B.h is added again!");
-        System.out.println("------------------------------------------------------------------------");
-
-        populate(gensrc,"beta/B.java",
-                       "package beta; import alfa.omega.A; public class B {"+
-                       "private int b() { return A.DEFINITION; } "+
-                 "@java.lang.annotation.Native final static int alfa = 42; }");
-
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyNewerFiles(previous_bin_state, new_bin_state,
-                         "bin/beta/B.class",
-                         "bin/beta/BINT.class",
-                         "bin/javac_state");
-        previous_bin_state = new_bin_state;
-
-        Map<String,Long> new_headers_state = collectState(headers);
-        verifyThatFilesHaveBeenAdded(previous_headers_state, new_headers_state,
-                                     "headers/beta_B.h");
-        previous_headers_state = new_headers_state;
-    }
-
-    void incrementalCompileChangeNative() throws Exception {
-        System.out.println("\nNow update the B.java file with a new value for the final static"+
-                           " annotated with @Native.");
-        System.out.println("Verify that beta_B.h is rewritten again!");
-        System.out.println("-------------------------------------------------------------------");
-
-        populate(gensrc,"beta/B.java",
-                       "package beta; import alfa.omega.A; public class B {"+
-                       "private int b() { return A.DEFINITION; } "+
-                 "@java.lang.annotation.Native final static int alfa = 43; }");
-
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyNewerFiles(previous_bin_state, new_bin_state,
-                         "bin/beta/B.class",
-                         "bin/beta/BINT.class",
-                         "bin/javac_state");
-        previous_bin_state = new_bin_state;
-
-        Map<String,Long> new_headers_state = collectState(headers);
-        verifyNewerFiles(previous_headers_state, new_headers_state,
-                         "headers/beta_B.h");
-        previous_headers_state = new_headers_state;
-    }
-
-    void compileWithOverrideSource() throws Exception {
-        System.out.println("\nNow verify that we can override sources to be compiled.");
-        System.out.println("Compile gensrc and gensrc2. However do not compile broken beta.B in gensrc,");
-        System.out.println("only compile ok beta.B in gensrc2.");
-        System.out.println("---------------------------------------------------------------------------");
-
-        delete(gensrc);
-        delete(gensrc2);
-        delete(bin);
-        previous_bin_state = collectState(bin);
-
-        populate(gensrc,"alfa/omega/A.java",
-                 "package alfa.omega; import beta.B; import gamma.C; public class A { B b; C c; }",
-                 "beta/B.java",
-                 "package beta; public class B { broken",
-                 "gamma/C.java",
-                 "package gamma; public class C { }");
-
-        populate(gensrc2,
-                 "beta/B.java",
-                 "package beta; public class B { }");
-
-        compile("-x", "beta", "gensrc", "gensrc2", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg);
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                                     "bin/alfa/omega/A.class",
-                                     "bin/beta/B.class",
-                                     "bin/gamma/C.class",
-                                     "bin/javac_state");
-
-        System.out.println("----- Compile with exluded beta went well!");
-        delete(bin);
-        compileExpectFailure("gensrc", "gensrc2", "-d", "bin", "-h", "headers", "-j", "1",
-                             serverArg);
-
-        System.out.println("----- Compile without exluded beta failed, as expected! Good!");
-        delete(bin);
-    }
-
-    void compileWithInvisibleSources() throws Exception {
-        System.out.println("\nNow verify that we can make sources invisible to linking (sourcepath).");
-        System.out.println("Compile gensrc and link against gensrc2 and gensrc3, however");
-        System.out.println("gensrc2 contains broken code in beta.B, thus we must exclude that package");
-        System.out.println("fortunately gensrc3 contains a proper beta.B.");
-        System.out.println("------------------------------------------------------------------------");
-
-        // Start with a fresh gensrcs and bin.
-        delete(gensrc);
-        delete(gensrc2);
-        delete(gensrc3);
-        delete(bin);
-        previous_bin_state = collectState(bin);
-
-        populate(gensrc,"alfa/omega/A.java",
-                 "package alfa.omega; import beta.B; import gamma.C; public class A { B b; C c; }");
-        populate(gensrc2,"beta/B.java",
-                 "package beta; public class B { broken",
-                 "gamma/C.java",
-                 "package gamma; public class C { }");
-        populate(gensrc3, "beta/B.java",
-                 "package beta; public class B { }");
-
-        compile("gensrc", "-x", "beta", "-sourcepath", "gensrc2",
-                "-sourcepath", "gensrc3", "-d", "bin", "-h", "headers", "-j", "1",
-                serverArg);
-
-        System.out.println("The first compile went well!");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                                     "bin/alfa/omega/A.class",
-                                     "bin/javac_state");
-
-        System.out.println("----- Compile with exluded beta went well!");
-        delete(bin);
-        compileExpectFailure("gensrc", "-sourcepath", "gensrc2", "-sourcepath", "gensrc3",
-                             "-d", "bin", "-h", "headers", "-j", "1",
-                             serverArg);
-
-        System.out.println("----- Compile without exluded beta failed, as expected! Good!");
-        delete(bin);
-    }
-
-    void compileCircularSources() throws Exception {
-        System.out.println("\nNow verify that circular sources split on multiple cores can be compiled.");
-        System.out.println("---------------------------------------------------------------------------");
-
-        // Start with a fresh gensrcs and bin.
-        delete(gensrc);
-        delete(gensrc2);
-        delete(gensrc3);
-        delete(bin);
-        previous_bin_state = collectState(bin);
-
-        populate(gensrc,"alfa/omega/A.java",
-                 "package alfa.omega; public class A { beta.B b; }",
-                 "beta/B.java",
-                 "package beta; public class B { gamma.C c; }",
-                 "gamma/C.java",
-                 "package gamma; public class C { alfa.omega.A a; }");
-
-        compile("gensrc", "-d", "bin", "-h", "headers", "-j", "3",
-                serverArg,"--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                                     "bin/alfa/omega/A.class",
-                                     "bin/beta/B.class",
-                                     "bin/gamma/C.class",
-                                     "bin/javac_state");
-        delete(bin);
-    }
-
-    /**
-     * Tests compiling class A that depends on class B without compiling class B
-     * @throws Exception If test fails
-     */
-    void compileExcludingDependency() throws Exception {
-        System.out.println("\nVerify that excluding classes from compilation but not from linking works.");
-        System.out.println("---------------------------------------------------------------------------");
-
-        delete(gensrc);
-        delete(bin);
-        previous_bin_state = collectState(bin);
-
-        populate(gensrc,
-                 "alfa/omega/A.java",
-                 "package alfa.omega; public class A { beta.B b; }",
-                 "beta/B.java",
-                 "package beta; public class B { }");
-
-        compile("-x", "beta", "-src", "gensrc", "-x", "alfa/omega", "-sourcepath", "gensrc",
-                "-d", "bin", serverArg);
-
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                                     "bin/alfa/omega/A.class",
-                                     "bin/javac_state");
-    }
-
-    void incrementalCompileTestFullyQualifiedRef() throws Exception {
-        System.out.println("\nVerify that \"alfa.omega.A a;\" does create a proper dependency.");
-        System.out.println("----------------------------------------------------------------");
-
-        populate(gensrc,
-                 "alfa/omega/A.java",
-                 "package alfa.omega; public class A { "+
-                 "  public final static int DEFINITION = 18; "+
-                 "  public void hello() { }"+
-                 "}",
-                 "beta/B.java",
-                 "package beta; public class B { "+
-                 "  public void world() { alfa.omega.A a; }"+
-                 "}");
-
-        compile("gensrc", "-d", "bin", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> previous_bin_state = collectState(bin);
-
-        // Change pubapi of A, this should trigger a recompile of B.
-        populate(gensrc,
-                 "alfa/omega/A.java",
-                 "package alfa.omega; public class A { "+
-                 "  public final static int DEFINITION = 19; "+
-                 "  public void hello() { }"+
-                 "}");
-
-        compile("gensrc", "-d", "bin", "-j", "1",
-                serverArg, "--log=debug");
-        Map<String,Long> new_bin_state = collectState(bin);
-
-        verifyNewerFiles(previous_bin_state, new_bin_state,
-                         "bin/alfa/omega/A.class",
-                         "bin/beta/B.class",
-                         "bin/javac_state");
-    }
-
-   /**
-     * Tests @atfile
-     * @throws Exception If test fails
-     */
-    void compileWithAtFile() throws Exception {
-        System.out.println("\nTest @atfile with command line content.");
-        System.out.println("---------------------------------------");
-
-        delete(gensrc);
-        delete(gensrc2);
-        delete(bin);
-
-        populate(gensrc,
-                 "list.txt",
-                 "-if */alfa/omega/A.java\n-if */beta/B.java\ngensrc\n-d bin\n",
-                 "alfa/omega/A.java",
-                 "package alfa.omega; import beta.B; public class A { B b; }",
-                 "beta/B.java",
-                 "package beta; public class B { }",
-                 "beta/C.java",
-                 "broken");
-        previous_bin_state = collectState(bin);
-        compile("@gensrc/list.txt", "--server:portfile=testserver,background=false");
-
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                         "bin/javac_state",
-                         "bin/alfa/omega/A.class",
-                         "bin/beta/B.class");
-    }
-
-    /**
-     * Tests storing javac_state into another directory.
-     * @throws Exception If test fails
-     */
-    void testStateDir() throws Exception {
-        System.out.println("\nVerify that --state-dir=bar works.");
-        System.out.println("----------------------------------");
-
-        Path bar = defaultfs.getPath("bar");
-        Files.createDirectory(bar);
-
-        delete(gensrc);
-        delete(bin);
-        delete(bar);
-        previous_bin_state = collectState(bin);
-        Map<String,Long> previous_bar_state = collectState(bar);
-
-        populate(gensrc,
-                 "alfa/omega/A.java",
-                 "package alfa.omega; public class A { }");
-
-        compile("--state-dir=bar", "-src", "gensrc", "-d", "bin", serverArg);
-
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                                     "bin/alfa/omega/A.class");
-        Map<String,Long> new_bar_state = collectState(bar);
-        verifyThatFilesHaveBeenAdded(previous_bar_state, new_bar_state,
-                                     "bar/javac_state");
-    }
-
-    /**
-     * Test white listing of external artifacts inside the destination dir.
-     * @throws Exception If test fails
-     */
-    void testPermittedArtifact() throws Exception {
-        System.out.println("\nVerify that --permit-artifact=bar works.");
-        System.out.println("-------------------------------------------");
-
-        delete(gensrc);
-        delete(bin);
-
-        previous_bin_state = collectState(bin);
-
-        populate(gensrc,
-                 "alfa/omega/A.java",
-                 "package alfa.omega; public class A { }");
-
-        populate(bin,
-                 "alfa/omega/AA.class",
-                 "Ugh, a messy build system (tobefixed) wrote this class file, sjavac must not delete it.");
-
-        compile("--log=debug", "--permit-artifact=bin/alfa/omega/AA.class", "-src", "gensrc", "-d", "bin", serverArg);
-
-        Map<String,Long> new_bin_state = collectState(bin);
-        verifyThatFilesHaveBeenAdded(previous_bin_state, new_bin_state,
-                                     "bin/alfa/omega/A.class",
-                                     "bin/alfa/omega/AA.class",
-                                     "bin/javac_state");
-    }
-
-    void removeFrom(Path dir, String... args) throws IOException {
-        for (String filename : args) {
-            Path p = dir.resolve(filename);
-            Files.delete(p);
-        }
-    }
-
-    void populate(Path src, String... args) throws IOException {
-        if (!Files.exists(src)) {
-            Files.createDirectory(src);
-        }
-        String[] a = args;
-        for (int i = 0; i<a.length; i+=2) {
-            String filename = a[i];
-            String content = a[i+1];
-            Path p = src.resolve(filename);
-            Files.createDirectories(p.getParent());
-            PrintWriter out = new PrintWriter(Files.newBufferedWriter(p,
-                                                                      Charset.defaultCharset()));
-            out.println(content);
-            out.close();
-        }
-    }
-
-    void delete(final Path root) throws IOException {
-        if (!Files.exists(root)) return;
-        Files.walkFileTree(root, new SimpleFileVisitor<Path>() {
-                 @Override
-                 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException
-                 {
-                     Files.delete(file);
-                     return FileVisitResult.CONTINUE;
-                 }
-
-                 @Override
-                 public FileVisitResult postVisitDirectory(Path dir, IOException e) throws IOException
-                 {
-                     if (e == null) {
-                         if (!dir.equals(root)) Files.delete(dir);
-                         return FileVisitResult.CONTINUE;
-                     } else {
-                         // directory iteration failed
-                         throw e;
-                     }
-                 }
-            });
-    }
-
-    void compile(String... args) throws Exception {
-        int rc = Main.go(args);
-        if (rc != 0) throw new Exception("Error during compile!");
-
-        // Wait a second, to get around the (temporary) problem with
-        // second resolution in the Java file api. But do not do this
-        // on windows where the timestamps work.
-        long in_a_sec = System.currentTimeMillis()+1000;
-        while (in_a_sec > System.currentTimeMillis()) {
-            try {
-                Thread.sleep(1000);
-            } catch (InterruptedException e) {
-            }
-        }
-    }
-
-    void compileExpectFailure(String... args) throws Exception {
-        int rc = Main.go(args);
-        if (rc == 0) throw new Exception("Expected error during compile! Did not fail!");
-    }
-
-    Map<String,Long> collectState(Path dir) throws IOException {
-        final Map<String,Long> files = new HashMap<>();
-        Files.walkFileTree(dir, new SimpleFileVisitor<Path>() {
-                 @Override
-                 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
-                   throws IOException
-                 {
-                     files.put(file.toString(),new Long(Files.getLastModifiedTime(file).toMillis()));
-                     return FileVisitResult.CONTINUE;
-                 }
-            });
-        return files;
-    }
-
-    void verifyThatFilesHaveBeenRemoved(Map<String,Long> from,
-                                        Map<String,Long> to,
-                                        String... args) throws Exception {
-
-        Set<String> froms = from.keySet();
-        Set<String> tos = to.keySet();
-
-        if (froms.equals(tos)) {
-            throw new Exception("Expected new state to have fewer files than previous state!");
-        }
-
-        for (String t : tos) {
-            if (!froms.contains(t)) {
-                throw new Exception("Expected "+t+" to exist in previous state!");
-            }
-        }
-
-        for (String f : args) {
-            f = f.replace("/", File.separator);
-            if (!froms.contains(f)) {
-                throw new Exception("Expected "+f+" to exist in previous state!");
-            }
-            if (tos.contains(f)) {
-                throw new Exception("Expected "+f+" to have been removed from the new state!");
-            }
-        }
-
-        if (froms.size() - args.length != tos.size()) {
-            throw new Exception("There are more removed files than the expected list!");
-        }
-    }
-
-    void verifyThatFilesHaveBeenAdded(Map<String,Long> from,
-                                      Map<String,Long> to,
-                                      String... args) throws Exception {
-
-        Set<String> froms = from.keySet();
-        Set<String> tos = to.keySet();
-
-        if (froms.equals(tos)) {
-            throw new Exception("Expected new state to have more files than previous state!");
-        }
-
-        for (String t : froms) {
-            if (!tos.contains(t)) {
-                throw new Exception("Expected "+t+" to exist in new state!");
-            }
-        }
-
-        for (String f : args) {
-            f = f.replace("/", File.separator);
-            if (!tos.contains(f)) {
-                throw new Exception("Expected "+f+" to have been added to new state!");
-            }
-            if (froms.contains(f)) {
-                throw new Exception("Expected "+f+" to not exist in previous state!");
-            }
-        }
-
-        if (froms.size() + args.length != tos.size()) {
-            throw new Exception("There are more added files than the expected list!");
-        }
-    }
-
-    void verifyNewerFiles(Map<String,Long> from,
-                          Map<String,Long> to,
-                          String... args) throws Exception {
-        if (!from.keySet().equals(to.keySet())) {
-            throw new Exception("Expected the set of files to be identical!");
-        }
-        Set<String> files = new HashSet<String>();
-        for (String s : args) {
-            files.add(s.replace("/", File.separator));
-        }
-        for (String fn : from.keySet()) {
-            long f = from.get(fn);
-            long t = to.get(fn);
-            if (files.contains(fn)) {
-                if (t <= f) {
-                    throw new Exception("Expected "+fn+" to have a more recent timestamp!");
-                }
-            } else {
-                if (t != f) {
-                    throw new Exception("Expected "+fn+" to have the same timestamp!");
-                }
-            }
-        }
-    }
-
-    String print(Map<String,Long> m) {
-        StringBuilder b = new StringBuilder();
-        Set<String> keys = m.keySet();
-        for (String k : keys) {
-            b.append(k+" "+m.get(k)+"\n");
-        }
-        return b.toString();
-    }
-
-    void verifyEqual(Map<String,Long> from, Map<String,Long> to) throws Exception {
-        if (!from.equals(to)) {
-            System.out.println("FROM---"+print(from));
-            System.out.println("TO-----"+print(to));
-            throw new Exception("The dir should not differ! But it does!");
-        }
-    }
-}