/*

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 * 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.

 *

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 */

/*

 * @test

 * @summary Test Completion

 * @modules jdk.internal.le/jdk.internal.jline.extra

 *          jdk.jshell/jdk.internal.jshell.tool

 * @build HistoryTest

 * @run testng HistoryTest

 */

import java.lang.reflect.Field;

import jdk.internal.jline.extra.EditingHistory;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

@Test

public class HistoryTest extends ReplToolTesting {

    public void testHistory() {

        test(

             a -> {if (!a) setCommandInput("void test() {\n");},

             a -> {if (!a) setCommandInput("    System.err.println(1);\n");},

             a -> {if (!a) setCommandInput("    System.err.println(1);\n");},

             a -> {assertCommand(a, "} //test", "|  created method test()");},

             a -> {

                 if (!a) {

                     try {

                         previousAndAssert(getHistory(), "} //test");

                         previousSnippetAndAssert(getHistory(), "void test() {");

                     } catch (Exception ex) {

                         throw new IllegalStateException(ex);

                     }

                 }

                 assertCommand(a, "int dummy;", "dummy ==> 0");

             });

        test(

             a -> {if (!a) setCommandInput("void test2() {\n");},

             a -> {assertCommand(a, "} //test2", "|  created method test2()");},

             a -> {

                 if (!a) {

                     try {

                         previousAndAssert(getHistory(), "} //test2");

                         previousSnippetAndAssert(getHistory(), "void test2() {");

                         previousSnippetAndAssert(getHistory(), "/debug 0"); //added by test framework

                         previousSnippetAndAssert(getHistory(), "/exit");

                         previousSnippetAndAssert(getHistory(), "int dummy;");

                         previousSnippetAndAssert(getHistory(), "void test() {");

                     } catch (Exception ex) {

                         throw new IllegalStateException(ex);

                     }

                 }

                 assertCommand(a, "int dummy;", "dummy ==> 0");

             });

    }

    private EditingHistory getHistory() throws Exception {

        Field input = repl.getClass().getDeclaredField("input");

        input.setAccessible(true);

        Object console = input.get(repl);

        Field history = console.getClass().getDeclaredField("history");

        history.setAccessible(true);

        return (EditingHistory) history.get(console);

    }

    private void previousAndAssert(EditingHistory history, String expected) {

        assertTrue(history.previous());

        assertEquals(history.current().toString(), expected);

    }

    private void previousSnippetAndAssert(EditingHistory history, String expected) {

        assertTrue(history.previousSnippet());

        assertEquals(history.current().toString(), expected);

    }

}