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/*

 * @test

 * @summary Tests for /reload in JShell tool

 * @modules jdk.compiler/com.sun.tools.javac.api

 *          jdk.compiler/com.sun.tools.javac.main

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

 * @library /tools/lib

 * @build KullaTesting TestingInputStream 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;

@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, "/classpath " + classpath,

                        String.format("|  Path %s added to classpath\n", classpath)),

                (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" +

                        "-: /classpath " + classpath + "\n" +

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

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

                       },

                (a) -> assertCommand(a, "v", "|  Variable v of type String has value \"Aprime\"\n"),

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

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

        );

    }

    public void testReloadDrop() {

        test(false, new String[]{"-nostartup"},

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

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

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

                a -> dropMethod(a, "/drop b", "b ()I"),

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

                a -> dropClass(a, "/dr A", "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, "/classes", assertClasses()),

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

        );

    }

    public void testReloadRepeat() {

        test(false, new String[]{"-nostartup"},

                (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", "|  Variable c of type int has value 11\n"),

                (a) -> assertCommand(a, "$4", "|  Variable $4 of type int has value 10\n")

        );

    }

    public void testReloadIgnore() {

        test(false, new String[]{"-nostartup"},

                (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.\n")

        );

    }

    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.\n"),

                (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\n"),

                (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 testReloadExitRestore() {

        test(false, new String[]{"-nostartup"},

                (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[]{"-nostartup"},

                (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")

        );

    }

}