test/jdk/java/nio/file/Files/SetLastModifiedTime.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileTime;

import org.testng.annotations.Test;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;

import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.assertFalse;

/**
 * @test
 * @bug 4313887 8062949 8191872
 * @library ..
 * @run testng SetLastModifiedTime
 * @summary Unit test for Files.setLastModifiedTime
 */

public class SetLastModifiedTime {

    static Path testDir;

    @BeforeClass
    void createTestDirectory() throws Exception {
        testDir = TestUtil.createTemporaryDirectory();
    }

    @AfterClass
    void removeTestDirectory() throws Exception {
        TestUtil.removeAll(testDir);
    }

    /**
     * Exercise Files.setLastModifiedTime on the given file
     */
    void test(Path path) throws Exception {
        FileTime now = Files.getLastModifiedTime(path);
        FileTime zero = FileTime.fromMillis(0L);

        Path result = Files.setLastModifiedTime(path, zero);
        assertTrue(result == path);
        assertEquals(Files.getLastModifiedTime(path), zero);

        result = Files.setLastModifiedTime(path, now);
        assertTrue(result == path);
        assertEquals(Files.getLastModifiedTime(path), now);
    }

    @Test
    public void testRegularFile() throws Exception {
        Path file = Files.createFile(testDir.resolve("file"));
        test(file);
    }

    @Test
    public void testDirectory() throws Exception {
        Path dir = Files.createDirectory(testDir.resolve("dir"));
        test(dir);
    }

    @Test
    public void testSymbolicLink() throws Exception {
        if (TestUtil.supportsSymbolicLinks(testDir)) {
            Path target = Files.createFile(testDir.resolve("target"));
            Path link = testDir.resolve("link");
            Files.createSymbolicLink(link, target);
            test(link);
        }
    }

    @Test
    public void testNulls() throws Exception {
        Path path = Paths.get("foo");
        FileTime zero = FileTime.fromMillis(0L);

        try {
            Files.setLastModifiedTime(null, zero);
            assertTrue(false);
        } catch (NullPointerException expected) { }

        try {
            Files.setLastModifiedTime(path, null);
            assertTrue(false);
        } catch (NullPointerException expected) { }

        try {
            Files.setLastModifiedTime(null, null);
            assertTrue(false);
        } catch (NullPointerException expected) { }
    }

    @Test
    public void testCompare() throws Exception {
        Path path = Files.createFile(testDir.resolve("path"));
        long timeMillis = 1512520600195L;
        FileTime fileTime = FileTime.fromMillis(timeMillis);
        Files.setLastModifiedTime(path, fileTime);
        File file = path.toFile();
        long ioTime = file.lastModified();
        long nioTime = Files.getLastModifiedTime(path).toMillis();
        assertTrue(ioTime == timeMillis || ioTime == 1000*(timeMillis/1000),
            "File.lastModified() not in {time, 1000*(time/1000)}");
        assertEquals(nioTime, ioTime,
            "File.lastModified() != Files.getLastModifiedTime().toMillis()");
    }
}