test/jdk/javadoc/tool/T4696488.java

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import com.sun.tools.doclets.internal.toolkit.Configuration;

/**
 * @test
 * @bug     4696488
 * @summary javadoc doesn't handle UNC paths for destination directory
 * @author  Jesse Glick
 * @modules jdk.javadoc/com.sun.tools.doclets.internal.toolkit
 * @run main T4696488 T4696488.java
 */
public class T4696488 {

    public static void main(String... args) {
        System.setProperty("file.separator", "/");
        assertAddTrailingFileSep("/path/to/dir", "/path/to/dir/");
        assertAddTrailingFileSep("/path/to/dir/", "/path/to/dir/");
        assertAddTrailingFileSep("/path/to/dir//", "/path/to/dir/");
        System.setProperty("file.separator", "\\");
        assertAddTrailingFileSep("C:\\path\\to\\dir", "C:\\path\\to\\dir\\");
        assertAddTrailingFileSep("C:\\path\\to\\dir\\", "C:\\path\\to\\dir\\");
        assertAddTrailingFileSep("C:\\path\\to\\dir\\\\", "C:\\path\\to\\dir\\");
        assertAddTrailingFileSep("\\\\server\\share\\path\\to\\dir", "\\\\server\\share\\path\\to\\dir\\");
        assertAddTrailingFileSep("\\\\server\\share\\path\\to\\dir\\", "\\\\server\\share\\path\\to\\dir\\");
        assertAddTrailingFileSep("\\\\server\\share\\path\\to\\dir\\\\", "\\\\server\\share\\path\\to\\dir\\");
    }

    private static void assertAddTrailingFileSep(String input, String expectedOutput) {
        String output = Configuration.addTrailingFileSep(input);
        if (!expectedOutput.equals(output)) {
            throw new Error("expected " + expectedOutput + " but was " + output);
        }
    }

}