fileutilstest.java

java ant的源码！非常值得看的源码

         */
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/./4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/.\\4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/./.\\4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/../3/4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/..\\3\\4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/../../5/.././2/./3/6/../4")).getPath());
        assertEquals(localize("/1/2/3/4"),
                     FILE_UTILS.normalize(localize("/1/2/3/..\\../5/..\\./2/./3/6\\../4")).getPath());

        try {
            FILE_UTILS.normalize("foo");
            fail("foo is not an absolute path");
        } catch (BuildException e) {
            // Expected exception caught
        }

        assertEquals("will not go outside FS root (but will not throw an exception either)",
                new File(localize("/1/../../b")),
                FILE_UTILS.normalize(localize("/1/../../b")));
    }

    /**
     * Test handling of null arguments.
     */
    public void testNullArgs() {
        try {
            FILE_UTILS.normalize(null);
            fail("successfully normalized a null-file");
        } catch (NullPointerException npe) {
            // Expected exception caught
        }

        File f = FILE_UTILS.resolveFile(null, "a");
        assertEquals(f, new File("a").getAbsoluteFile());
    }

    /**
     * Test createTempFile
     */
    public void testCreateTempFile() {
        File parent = new File((new File("/tmp")).getAbsolutePath());
        File tmp1 = FILE_UTILS.createTempFile("pre", ".suf", parent);
        assertTrue("new file", !tmp1.exists());

        String name = tmp1.getName();
        assertTrue("starts with pre", name.startsWith("pre"));
        assertTrue("ends with .suf", name.endsWith(".suf"));
        assertEquals("is inside parent dir",
                     parent.getAbsolutePath(),
                     tmp1.getParent());

        File tmp2 = FILE_UTILS.createTempFile("pre", ".suf", parent);
        assertTrue("files are different",
                   !tmp1.getAbsolutePath().equals(tmp2.getAbsolutePath()));

        // null parent dir
        File tmp3 = FILE_UTILS.createTempFile("pre", ".suf", null);
        String  tmploc = System.getProperty("java.io.tmpdir");
        assertEquals((new File(tmploc, tmp3.getName())).getAbsolutePath(),
                     tmp3.getAbsolutePath());
    }

    /**
     * Test contentEquals
     */
    public void testContentEquals() throws IOException {
        assertTrue("Non existing files", FILE_UTILS.contentEquals(new File(System.getProperty("root"), "foo"),
                                                          new File(System.getProperty("root"), "bar")));
        assertTrue("One exists, the other one doesn\'t",
                   !FILE_UTILS.contentEquals(new File(System.getProperty("root"), "foo"), new File(System.getProperty("root"), "build.xml")));
        assertTrue("Don\'t compare directories",
                   !FILE_UTILS.contentEquals(new File(System.getProperty("root"), "src"), new File(System.getProperty("root"), "src")));
        assertTrue("File equals itself",
                   FILE_UTILS.contentEquals(new File(System.getProperty("root"), "build.xml"),
                                    new File(System.getProperty("root"), "build.xml")));
        assertTrue("Files are different",
                   !FILE_UTILS.contentEquals(new File(System.getProperty("root"), "build.xml"),
                                     new File(System.getProperty("root"), "docs.xml")));
    }

    /**
     * Test createNewFile
     */
    public void testCreateNewFile() throws IOException {
        removeThis = new File("dummy");
        assertTrue(!removeThis.exists());
        FILE_UTILS.createNewFile(removeThis);
        assertTrue(removeThis.exists());
    }

    /**
     * Test removeLeadingPath.
     */
    public void testRemoveLeadingPath() {
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("/foo"),
                                                 new File("/foo/bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("/foo/"),
                                                 new File("/foo/bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("\\foo"),
                                                 new File("\\foo\\bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("\\foo\\"),
                                                 new File("\\foo\\bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("c:/foo"),
                                                 new File("c:/foo/bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("c:/foo/"),
                                                 new File("c:/foo/bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("c:\\foo"),
                                                 new File("c:\\foo\\bar")));
        assertEquals("bar", FILE_UTILS.removeLeadingPath(new File("c:\\foo\\"),
                                                 new File("c:\\foo\\bar")));
        if (!(Os.isFamily("dos") || Os.isFamily("netware"))) {
            assertEquals(FILE_UTILS.normalize("/bar").getAbsolutePath(),
                         FILE_UTILS.removeLeadingPath(new File("/foo"), new File("/bar")));
            assertEquals(FILE_UTILS.normalize("/foobar").getAbsolutePath(),
                         FILE_UTILS.removeLeadingPath(new File("/foo"), new File("/foobar")));
        }
        // bugzilla report 19979
        assertEquals("", FILE_UTILS.removeLeadingPath(new File("/foo/bar"),
                                              new File("/foo/bar")));
        assertEquals("", FILE_UTILS.removeLeadingPath(new File("/foo/bar"),
                                              new File("/foo/bar/")));
        assertEquals("", FILE_UTILS.removeLeadingPath(new File("/foo/bar/"),
                                              new File("/foo/bar/")));
        assertEquals("", FILE_UTILS.removeLeadingPath(new File("/foo/bar/"),
                                              new File("/foo/bar")));

        String expected = "foo/bar".replace('\\', File.separatorChar)
            .replace('/', File.separatorChar);
        assertEquals(expected, FILE_UTILS.removeLeadingPath(new File("/"),
                                                    new File("/foo/bar")));
        assertEquals(expected, FILE_UTILS.removeLeadingPath(new File("c:/"),
                                                    new File("c:/foo/bar")));
        assertEquals(expected, FILE_UTILS.removeLeadingPath(new File("c:\\"),
                                                    new File("c:\\foo\\bar")));
    }

    /**
     * test toUri
     */
    public void testToURI() {
        String dosRoot = null;
        if (Os.isFamily("dos") || Os.isFamily("netware")) {
            dosRoot = System.getProperty("user.dir")
                .substring(0, 3).replace(File.separatorChar, '/');

            //preserve case on Cygwin when using 1.4 toURI:
            Class uriClazz = null;
            try {
                uriClazz = Class.forName("java.net.URI");
            } catch (ClassNotFoundException e) {
                // OK, Java 1.3.
                dosRoot = dosRoot.toUpperCase();
            }
        }
        else
        {
            dosRoot = "";
        }
        if (Os.isFamily("dos")) {
            assertEquals("file:/c:/foo", removeExtraneousAuthority(FILE_UTILS.toURI("c:\\foo")));
        }
        if (Os.isFamily("netware")) {
            assertEquals("file:/SYS:/foo", removeExtraneousAuthority(FILE_UTILS.toURI("sys:\\foo")));
        }
        if (File.pathSeparatorChar == '/') {
            assertEquals("file:/foo", removeExtraneousAuthority(FILE_UTILS.toURI("/foo")));
            assertTrue("file: URIs must name absolute paths", FILE_UTILS.toURI("./foo").startsWith("file:/"));
            assertTrue(FILE_UTILS.toURI("./foo").endsWith("/foo"));
            assertEquals("file:/" + dosRoot + "foo%20bar", removeExtraneousAuthority(FILE_UTILS.toURI("/foo bar")));
            assertEquals("file:/" + dosRoot + "foo%23bar", removeExtraneousAuthority(FILE_UTILS.toURI("/foo#bar")));
        } else if (File.pathSeparatorChar == '\\') {
            assertEquals("file:/" + dosRoot + "foo", removeExtraneousAuthority(FILE_UTILS.toURI("\\foo")));
            assertTrue("file: URIs must name absolute paths", FILE_UTILS.toURI(".\\foo").startsWith("file:/"));
            assertTrue(FILE_UTILS.toURI(".\\foo").endsWith("/foo"));
            assertEquals("file:/" + dosRoot + "foo%20bar", removeExtraneousAuthority(FILE_UTILS.toURI("\\foo bar")));
            assertEquals("file:/" + dosRoot + "foo%23bar", removeExtraneousAuthority(FILE_UTILS.toURI("\\foo#bar")));
        }
        // a test with ant for germans
        // the escaped character used for the test is the "a umlaut"
        // this is the fix for the bug 37348
        assertEquals("file:/" + dosRoot + "%C3%A4nt", removeExtraneousAuthority(FILE_UTILS.toURI("/\u00E4nt")));
    }

    /**
     * Authority field is unnecessary, but harmless, in file: URIs.
     * Java 1.4 does not produce it when using File.toURI.
     */
    private static String removeExtraneousAuthority(String uri) {
        String prefix = "file:///";
        if (uri.startsWith(prefix)) {
            return "file:/" + uri.substring(prefix.length());
        } else {
            return uri;
        }
    }

    public void testIsContextRelativePath() {
        if (Os.isFamily("dos")) {
            assertTrue(FileUtils.isContextRelativePath("/\u00E4nt"));
            assertTrue(FileUtils.isContextRelativePath("\\foo"));
        }
    }
    /**
     * test fromUri
     */
    public void testFromURI() {
        String dosRoot = null;
        if (Os.isFamily("dos") || Os.isFamily("netware")) {
            dosRoot = System.getProperty("user.dir").substring(0, 2);
        } else {
            dosRoot = "";
        }
        if (Os.isFamily("netware")) {
            assertEqualsIgnoreDriveCase("SYS:\\foo", FILE_UTILS.fromURI("file:///sys:/foo"));
        }
        if (Os.isFamily("dos")) {
            assertEqualsIgnoreDriveCase("C:\\foo", FILE_UTILS.fromURI("file:///c:/foo"));
        }
        assertEqualsIgnoreDriveCase(dosRoot + File.separator + "foo", FILE_UTILS.fromURI("file:///foo"));
        assertEquals("." + File.separator + "foo",
                     FILE_UTILS.fromURI("file:./foo"));
        assertEquals(dosRoot + File.separator + "foo bar", FILE_UTILS.fromURI("file:///foo%20bar"));
        assertEquals(dosRoot + File.separator + "foo#bar", FILE_UTILS.fromURI("file:///foo%23bar"));
    }

    public void testModificationTests() {

        //get a time
        long firstTime=System.currentTimeMillis();
        //add some time. We assume no OS has a granularity this bad
        long secondTime=firstTime+60000;
/*
        assertTrue("same timestamp is up to date",
                fu.isUpToDate(firstTime, firstTime));
                */

        //check that older is up to date with a newer dest
        assertTrue("older source files are up to date",
                FILE_UTILS.isUpToDate(firstTime,secondTime));
        //check that older is up to date with a newer dest
        assertFalse("newer source files are no up to date",
                FILE_UTILS.isUpToDate(secondTime, firstTime));

        assertTrue("-1 dest timestamp implies nonexistence",
                !FILE_UTILS.isUpToDate(firstTime,-1L));
    }

    public void testGetDefaultEncoding() {
        // This just tests that the function does not blow up
        FILE_UTILS.getDefaultEncoding();
    }

    /**
     * adapt file separators to local conventions
     */
    private String localize(String path) {
        path = root + path.substring(1);
        return path.replace('\\', File.separatorChar).replace('/', File.separatorChar);
    }

    /**
     * convenience method
     * normalize brings the drive in uppercase
     * the drive letter is in lower case under cygwin
     * calling this method allows tests where normalize is called to pass under cygwin
     */
    private void assertEqualsIgnoreDriveCase(String s1, String s2) {
        if ((Os.isFamily("dos") || Os.isFamily("netware"))
            && s1.length() > 0 && s2.length() > 0) {
            StringBuffer sb1 = new StringBuffer(s1);
            StringBuffer sb2 = new StringBuffer(s2);
            sb1.setCharAt(0, Character.toUpperCase(s1.charAt(0)));
            sb2.setCharAt(0, Character.toUpperCase(s2.charAt(0)));
            assertEquals(sb1.toString(), sb2.toString());
        } else {
            assertEquals(s1, s2);
        }
    }
}