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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * 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.
 *
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 */

/*
 * @test 8151754
 * @summary Testing start-up options.
 * @modules jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.main
 *          jdk.jdeps/com.sun.tools.javap
 *          jdk.jshell/jdk.internal.jshell.tool
 * @library /tools/lib
 * @build Compiler toolbox.ToolBox
 * @run testng StartOptionTest
 */

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.util.Locale;
import java.util.function.Consumer;

import jdk.internal.jshell.tool.JShellTool;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

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

@Test
public class StartOptionTest {

    private ByteArrayOutputStream cmdout;
    private ByteArrayOutputStream cmderr;
    private ByteArrayOutputStream console;
    private ByteArrayOutputStream userout;
    private ByteArrayOutputStream usererr;

    private JShellTool getShellTool() {
        return new JShellTool(
                new TestingInputStream(),
                new PrintStream(cmdout),
                new PrintStream(cmderr),
                new PrintStream(console),
                new TestingInputStream(),
                new PrintStream(userout),
                new PrintStream(usererr),
                new ReplToolTesting.MemoryPreferences(),
                Locale.ROOT);
    }

    private void check(ByteArrayOutputStream str, Consumer<String> checkOut, String label) {
        byte[] bytes = str.toByteArray();
        str.reset();
        String out =  new String(bytes, StandardCharsets.UTF_8);
        if (checkOut != null) {
            checkOut.accept(out);
        } else {
            assertEquals("", out, label + ": Expected empty -- ");
        }
    }

    private void start(Consumer<String> checkOutput, Consumer<String> checkError, String... args) throws Exception {
        JShellTool tool = getShellTool();
        tool.start(args);
        check(cmdout, checkOutput, "cmdout");
        check(cmderr, checkError, "cmderr");
        check(console, null, "console");
        check(userout, null, "userout");
        check(usererr, null, "usererr");
    }

    private void start(String expectedOutput, String expectedError, String... args) throws Exception {
        start(s -> assertEquals(s.trim(), expectedOutput, "cmdout: "), s -> assertEquals(s.trim(), expectedError, "cmderr: "), args);
    }

    @BeforeMethod
    public void setUp() {
        cmdout  = new ByteArrayOutputStream();
        cmderr  = new ByteArrayOutputStream();
        console = new ByteArrayOutputStream();
        userout = new ByteArrayOutputStream();
        usererr = new ByteArrayOutputStream();
    }

    @Test
    public void testUsage() throws Exception {
        start(s -> {
            assertTrue(s.split("\n").length >= 7, "Not enough usage lines: " + s);
            assertTrue(s.startsWith("Usage:   jshell <options>"), "Unexpect usage start: " + s);
        },  null, "-help");
    }

    @Test
    public void testUnknown() throws Exception {
        start(s -> {
            assertTrue(s.split("\n").length >= 7, "Not enough usage lines (unknown): " + s);
            assertTrue(s.startsWith("Usage:   jshell <options>"), "Unexpect usage start (unknown): " + s);
        }, s -> assertEquals(s.trim(), "Unknown option: -unknown"), "-unknown");
    }

    @Test(enabled = false) // TODO 8080883
    public void testStartup() throws Exception {
        Compiler compiler = new Compiler();
        Path p = compiler.getPath("file.txt");
        compiler.writeToFile(p);
        start("", "'-startup' requires a filename argument.", "-startup");
        start("", "Conflicting -startup or -nostartup option.", "-startup", p.toString(), "-startup", p.toString());
        start("", "Conflicting -startup or -nostartup option.", "-nostartup", "-startup", p.toString());
        start("", "Conflicting -startup or -nostartup option.", "-startup", p.toString(), "-nostartup");
    }

    @Test
    public void testClasspath() throws Exception {
        for (String cp : new String[] {"-cp", "-classpath"}) {
            start("", "Conflicting -classpath option.", cp, ".", "-classpath", ".");
            start("", "Argument to -classpath missing.", cp);
        }
    }

    @Test
    public void testNegFeedbackOption() throws Exception {
        start("", "Argument to -feedback missing. Mode required.", "-feedback");
        start("", "Does not match any current feedback mode: blorp -- -feedback blorp", "-feedback", "blorp");
    }

    @Test
    public void testVersion() throws Exception {
        start(s -> assertTrue(s.startsWith("jshell"), "unexpected version: " + s), null, "-version");
    }

    @AfterMethod
    public void tearDown() {
        cmdout  = null;
        cmderr  = null;
        console = null;
        userout = null;
        usererr = null;
    }
}