/*

 * Copyright (c) 2015, 2017, 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.

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/*

 * @test

 * @key intermittent

 * @bug 8081845 8147898 8143955  8165405 8178023

 * @summary Tests for /reload in JShell tool

 * @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 KullaTesting TestingInputStream toolbox.ToolBox Compiler

 * @run testng ToolReloadTest

 */

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.function.Function;

import org.testng.annotations.Test;

import static org.testng.Assert.assertTrue;

@Test

public class ToolReloadTest extends ReplToolTesting {

    public void testReloadSnippets() {

        test(

                (a) -> assertVariable(a, "int", "x", "5", "5"),

                (a) -> assertMethod(a, "int m(int z) { return z * z; }",

                        "(int)int", "m"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommand(a, "/reload",

                        "|  Restarting and restoring state.\n" +

                        "-: int x = 5;\n" +

                        "-: int m(int z) { return z * z; }\n" +

                        "-: m(x)\n"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommandCheckOutput(a, "/vars", assertVariables()),

                (a) -> assertCommandCheckOutput(a, "/methods", assertMethods())

        );

    }

    public void testReloadClasspath() {

        Function<String,String> prog = (s) -> String.format(

                "package pkg; public class A { public String toString() { return \"%s\"; } }\n", s);

        Compiler compiler = new Compiler();

        Path outDir = Paths.get("testClasspathDirectory");

        compiler.compile(outDir, prog.apply("A"));

        Path classpath = compiler.getPath(outDir);

        test(

                (a) -> assertCommand(a, "/env --class-path " + classpath,

                        "|  Setting new options and restoring state."),

                (a) -> assertMethod(a, "String foo() { return (new pkg.A()).toString(); }",

                        "()String", "foo"),

                (a) -> assertVariable(a, "String", "v", "foo()", "\"A\""),

                (a) -> {

                       if (!a) compiler.compile(outDir, prog.apply("Aprime"));

                       assertCommand(a, "/reload",

                        "|  Restarting and restoring state.\n" +

                        "-: String foo() { return (new pkg.A()).toString(); }\n" +

                        "-: String v = foo();\n");

                       },

                (a) -> assertCommand(a, "v", "v ==> \"Aprime\""),

                (a) -> evaluateExpression(a, "String", "foo()", "\"Aprime\""),

                (a) -> evaluateExpression(a, "pkg.A", "new pkg.A();", "Aprime")

        );

    }

    public void testReloadDrop() {

        test(false, new String[]{"--no-startup"},

                a -> assertVariable(a, "int", "a"),

                a -> dropVariable(a, "/dr 1", "int a = 0", "|  dropped variable a"),

                a -> assertMethod(a, "int b() { return 0; }", "()int", "b"),

                a -> dropMethod(a, "/drop b", "int b()", "|  dropped method b()"),

                a -> assertClass(a, "class A {}", "class", "A"),

                a -> dropClass(a, "/dr A", "class A", "|  dropped class A"),

                a -> assertCommand(a, "/reload",

                        "|  Restarting and restoring state.\n" +

                        "-: int a;\n" +

                        "-: /drop 1\n" +

                        "-: int b() { return 0; }\n" +

                        "-: /drop b\n" +

                        "-: class A {}\n" +

                        "-: /drop A\n"),

                a -> assertCommandCheckOutput(a, "/vars", assertVariables()),

                a -> assertCommandCheckOutput(a, "/methods", assertMethods()),

                a -> assertCommandCheckOutput(a, "/types", assertClasses()),

                a -> assertCommandCheckOutput(a, "/imports", assertImports())

        );

    }

    public void testReloadQuiet() {

        test(false, new String[]{"--no-startup"},

                a -> assertVariable(a, "int", "a"),

                a -> dropVariable(a, "/dr 1", "int a = 0", "|  dropped variable a"),

                a -> assertMethod(a, "int b() { return 0; }", "()int", "b"),

                a -> dropMethod(a, "/drop b", "int b()", "|  dropped method b()"),

                a -> assertClass(a, "class A {}", "class", "A"),

                a -> dropClass(a, "/dr A", "class A", "|  dropped class A"),

                a -> assertCommand(a, "/reload -quiet",

                        "|  Restarting and restoring state."),

                a -> assertCommandCheckOutput(a, "/vars", assertVariables()),

                a -> assertCommandCheckOutput(a, "/methods", assertMethods()),

                a -> assertCommandCheckOutput(a, "/types", assertClasses()),

                a -> assertCommandCheckOutput(a, "/imports", assertImports())

        );

    }

    public void testReloadRepeat() {

        test(false, new String[]{"--no-startup"},

                (a) -> assertVariable(a, "int", "c", "7", "7"),

                (a) -> assertCommand(a, "++c", null),

                (a) -> assertCommand(a, "/!", null),

                (a) -> assertCommand(a, "/2", null),

                (a) -> assertCommand(a, "/-1", null),

                (a) -> assertCommand(a, "/reload",

                        "|  Restarting and restoring state.\n" +

                        "-: int c = 7;\n" +

                        "-: ++c\n" +

                        "-: ++c\n" +

                        "-: ++c\n" +

                        "-: ++c\n"

                ),

                (a) -> assertCommand(a, "c", "c ==> 11"),

                (a) -> assertCommand(a, "$4", "$4 ==> 10")

        );

    }

    public void testReloadIgnore() {

        test(false, new String[]{"--no-startup"},

                (a) -> assertCommand(a, "(-)", null),

                (a) -> assertCommand(a, "/list", null),

                (a) -> assertCommand(a, "/history", null),

                (a) -> assertCommand(a, "/help", null),

                (a) -> assertCommand(a, "/vars", null),

                (a) -> assertCommand(a, "/save abcd", null),

                (a) -> assertCommand(a, "/reload",

                        "|  Restarting and restoring state.")

        );

    }

    public void testReloadResetRestore() {

        test(

                (a) -> assertVariable(a, "int", "x", "5", "5"),

                (a) -> assertMethod(a, "int m(int z) { return z * z; }",

                        "(int)int", "m"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommand(a, "/reset", "|  Resetting state."),

                (a) -> assertCommand(a, "/reload -restore",

                        "|  Restarting and restoring from previous state.\n" +

                        "-: int x = 5;\n" +

                        "-: int m(int z) { return z * z; }\n" +

                        "-: m(x)\n"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommandCheckOutput(a, "/vars", assertVariables()),

                (a) -> assertCommandCheckOutput(a, "/methods", assertMethods())

        );

    }

    public void testReloadCrashRestore() {

        test(

                (a) -> assertVariable(a, "int", "x", "5", "5"),

                (a) -> assertMethod(a, "int m(int z) { return z * z; }",

                        "(int)int", "m"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommand(a, "System.exit(1);",

                        "|  State engine terminated.\n" +

                        "|  Restore definitions with: /reload -restore"),

                (a) -> assertCommand(a, "/reload -restore",

                        "|  Restarting and restoring from previous state.\n" +

                        "-: int x = 5;\n" +

                        "-: int m(int z) { return z * z; }\n" +

                        "-: m(x)\n"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommandCheckOutput(a, "/vars", assertVariables()),

                (a) -> assertCommandCheckOutput(a, "/methods", assertMethods())

        );

    }

    public void testEnvBadModule() {

        test(

                (a) -> assertVariable(a, "int", "x", "5", "5"),

                (a) -> assertMethod(a, "int m(int z) { return z * z; }",

                        "(int)int", "m"),

                (a) -> assertCommandCheckOutput(a, "/env --add-module unKnown",

                        s -> {

                            assertTrue(s.startsWith(

                                "|  Setting new options and restoring state.\n" +

                                "|  Restart failed:"));

                            assertTrue(s.contains("unKnown"),

                                    "\"unKnown\" missing from: " + s);

                            assertTrue(s.contains("previous settings"),

                                    "\"previous settings\" missing from: " + s);

                                      }),

                (a) -> evaluateExpression(a, "int", "m(x)", "25"),

                (a) -> assertCommandCheckOutput(a, "/vars", assertVariables()),

                (a) -> assertCommandCheckOutput(a, "/methods", assertMethods())

        );

    }

    public void testReloadExitRestore() {

        test(false, new String[]{"--no-startup"},

                (a) -> assertVariable(a, "int", "x", "5", "5"),

                (a) -> assertMethod(a, "int m(int z) { return z * z; }",

                        "(int)int", "m"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25")

        );

        test(false, new String[]{"--no-startup"},

                (a) -> assertCommand(a, "/reload -restore",

                        "|  Restarting and restoring from previous state.\n" +

                        "-: int x = 5;\n" +

                        "-: int m(int z) { return z * z; }\n" +

                        "-: m(x)\n"),

                (a) -> evaluateExpression(a, "int", "m(x)", "25")

        );

    }

}