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 * Copyright (c) 2019, 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
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 */
package test.java.lang.String;

/*
 * @test
 * @bug 8223780
 * @summary This exercises String#translateEscapes patterns and limits.
 * @compile TranslateEscapes.java
 * @run main TranslateEscapes
 */

import org.testng.annotations.Test;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;

public class TranslateEscapes {

    @Test
    public void testStandardEscapes() {
        verifyEscape("b", '\b');
        verifyEscape("f", '\f');
        verifyEscape("n", '\n');
        verifyEscape("r", '\r');
        verifyEscape("t", '\t');
        verifyEscape("'", '\'');
        verifyEscape("\"", '\"');
        verifyEscape("\\", '\\');
    }

    @Test
    public void testOctalEscapes() {
        verifyOctalEscape("0", 0);
        verifyOctalEscape("3", 03);
        verifyOctalEscape("7", 07);
        verifyOctalEscape("07", 07);
        verifyOctalEscape("17", 017);
        verifyOctalEscape("27", 027);
        verifyOctalEscape("37", 037);
        verifyOctalEscape("377", 0377);

        verifyOctalEscape("777", 077);
        verifyOctalEscape("78", 07);
    }

    @Test
    static void testExceptions() {
        exceptionThrown("+");
        exceptionThrown("q");
    }

    @Test
    public void testEscapeLineTerminator() {
        verifyLineTerminator("\n");
        verifyLineTerminator("\r\n");
        verifyLineTerminator("\r");
    }

    static void verifyEscape(String string, char ch) {
        String escapes = "\\" + string;
        assertEquals(escapes.translateEscapes().charAt(0), ch,
            String.format("\"%s\" not escape \"%s\"'%n", string, escapes));
    }

    static void verifyOctalEscape(String string, int octal) {
        String escapes = "\\" + string;
        assertEquals(escapes.translateEscapes().charAt(0), octal,
            String.format("\"%s\" not octal %o%n", string, octal));
    }

    static void exceptionThrown(String string) {
        String escapes = "\\" + string;
        try {
            escapes.translateEscapes();
            fail(String.format("escape not thrown for %s%n", string));
        } catch (IllegalArgumentException ex) {
            // okay
        }
    }

    static void verifyLineTerminator(String string) {
        String escapes = "\\" + string;
        assertTrue(escapes.translateEscapes().isEmpty(),
            String.format("escape for line terminator not handled %s%n",
                           string.replace("\n", "\\n").replace("\r", "\\r")));
    }
}