/*

 * Copyright (c) 2015, 2016, 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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 * questions.

 */

/*

 * @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.OutputStream;

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;

import static org.testng.Assert.fail;

@Test

public class StartOptionTest {

    private ByteArrayOutputStream out;

    private ByteArrayOutputStream err;

    private JShellTool getShellTool() {

        class NoOutputAllowedStream extends OutputStream {

            private final String label;

            NoOutputAllowedStream(String label) {

               this.label = label;

            }

            @Override

            public void write(int b) { fail("Unexpected output to: " + label); }

        }

        return new JShellTool(

                new TestingInputStream(),

                new PrintStream(out),

                new PrintStream(err),

                new PrintStream(new NoOutputAllowedStream("console")),

                new TestingInputStream(),

                new PrintStream(new NoOutputAllowedStream("userout")),

                new PrintStream(new NoOutputAllowedStream("usererr")),

                new ReplToolTesting.MemoryPreferences(),

                Locale.ROOT);

    }

    private String getOutput() {

        byte[] bytes = out.toByteArray();

        out.reset();

        return new String(bytes, StandardCharsets.UTF_8);

    }

    private String getError() {

        byte[] bytes = err.toByteArray();

        err.reset();

        return new String(bytes, StandardCharsets.UTF_8);

    }

    private void start(Consumer<String> checkOutput, Consumer<String> checkError, String... args) throws Exception {

        JShellTool tool = getShellTool();

        tool.start(args);

        if (checkOutput != null) {

            checkOutput.accept(getOutput());

        } else {

            assertEquals("", getOutput(), "Output: ");

        }

        if (checkError != null) {

            checkError.accept(getError());

        } else {

            assertEquals("", getError(), "Error: ");

        }

    }

    private void start(String expectedOutput, String expectedError, String... args) throws Exception {

        start(s -> assertEquals(s.trim(), expectedOutput, "Output: "), s -> assertEquals(s.trim(), expectedError, "Error: "), args);

    }

    @BeforeMethod

    public void setUp() {

        out = new ByteArrayOutputStream();

        err = new ByteArrayOutputStream();

    }

    @Test

    public void testUsage() throws Exception {

        start(s -> {

            assertTrue(s.split("\n").length >= 7, s);

            assertTrue(s.startsWith("Usage:   jshell <options>"), s);

        },  null, "-help");

    }

    @Test

    public void testUnknown() throws Exception {

        start(s -> {

            assertTrue(s.split("\n").length >= 7, s);

            assertTrue(s.startsWith("Usage:   jshell <options>"), 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")), null, "-version");

    }

    @AfterMethod

    public void tearDown() {

        out = null;

        err = null;

    }

}