/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 8158123 8161906 8162713

 * @summary tests for module declarations

 * @library /tools/lib

 * @modules

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

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

 *      jdk.jdeps/com.sun.tools.javap

 * @build toolbox.ToolBox toolbox.JavacTask ModuleTestBase

 * @run main ModuleInfoTest

 */

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.Arrays;

import toolbox.JavacTask;

import toolbox.Task;

public class ModuleInfoTest extends ModuleTestBase {

    public static void main(String... args) throws Exception {

        ModuleInfoTest t = new ModuleInfoTest();

        t.runTests();

    }

    /**

     * Check error message if module declaration not in module-info.java.

     */

    @Test

    public void testModuleDeclNotInModuleJava(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeFile(src.resolve("M.java"), "module M { }");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("M.java:1:1: compiler.err.module.decl.sb.in.module-info.java"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that a package private class can be put in module-info.java.

     */

    @Test

    public void testNotModuleDeclInModuleJava_1(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeFile(src.resolve("module-info.java"), "class C { }");

        new JavacTask(tb)

                .options("-XDrawDiagnostics")

                .files(findJavaFiles(src))

                .run()

                .writeAll();

    }

    /**

     * Verify that a public class cannot be put in module-info.java.

     */

    @Test

    public void testNotModuleDeclInModuleJava_2(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeFile(src.resolve("module-info.java"), "public class C { }");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:8: compiler.err.class.public.should.be.in.file: C"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that only one module decl can be put in module-info.java.

     */

    @Test

    public void testSingleModuleDecl(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src, "module M1 { } /*...*/ module M2 { }");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:14: compiler.err.expected: token.end-of-input"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that missing requires are reported.

     */

    @Test

    public void testRequiresNotFound(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src, "module M1 { requires M2; }");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:22: compiler.err.module.not.found: M2"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that missing exports targets are reported.

     */

    @Test

    public void testExportsNotFound(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src,

                          "module M { exports p to N; }",

                          "package p; public class C {}");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "-Xlint:module")

                .files(findJavaFiles(src))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:25: compiler.warn.module.not.found: N"))

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that duplicated qualified missing exports targets are reported.

     */

    @Test

    public void testExportsNotFoundDuplicated(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src,

                          "module M { exports p to N, N; }",

                          "package p; public class C {}");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "-Xlint:module")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:28: compiler.err.conflicting.exports.to.module: N"))

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that missing exports target warning can be suppressed.

     */

    @Test

    public void testExportsNotFoundSuppress(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src,

                          "@SuppressWarnings(\"module\") module M { exports p to N; }",

                          "package p; public class C {}");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "-Xlint:module")

                .files(findJavaFiles(src))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.isEmpty())

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that missing opens targets are reported.

     */

    @Test

    public void testOpensNotFound(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src,

                          "module M { opens p to N; }",

                          "package p; public class C {}");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "-Xlint:module")

                .files(findJavaFiles(src))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:23: compiler.warn.module.not.found: N"))

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that duplicated qualified missing opens targets are reported.

     */

    @Test

    public void testOpensNotFoundDuplicated(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src,

                          "module M { opens p to N, N; }",

                          "package p; public class C {}");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "-Xlint:module")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:26: compiler.err.conflicting.opens.to.module: N"))

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that missing opens target warning can be suppressed.

     */

    @Test

    public void testOpensNotFoundSuppress(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src,

                          "@SuppressWarnings(\"module\") module M { opens p to N; }",

                          "package p; public class C {}");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "-Xlint:module")

                .files(findJavaFiles(src))

                .run()

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.isEmpty())

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that a simple loop is detected.

     */

    @Test

    public void testRequiresSelf(Path base) throws Exception {

        Path src = base.resolve("src");

        tb.writeJavaFiles(src, "module M { requires M; }");

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics")

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:21: compiler.err.cyclic.requires: M"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that a multi-module loop is detected.

     */

    @Test

    public void testRequiresLoop(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1x");

        tb.writeFile(src_m1.resolve("module-info.java"), "module m1x { requires m2x; }");

        Path src_m2 = src.resolve("m2x");

        tb.writeFile(src_m2.resolve("module-info.java"), "module m2x { requires m3x; }");

        Path src_m3 = src.resolve("m3x");

        tb.writeFile(src_m3.resolve("module-info.java"), "module m3x { requires m1x; }");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics", "--module-source-path", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:23: compiler.err.cyclic.requires: m3x"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that a multi-module loop is detected.

     */

    @Test

    public void testRequiresTransitiveLoop(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1x");

        tb.writeFile(src_m1.resolve("module-info.java"), "module m1x { requires m2x; }");

        Path src_m2 = src.resolve("m2x");

        tb.writeFile(src_m2.resolve("module-info.java"), "module m2x { requires transitive m3x; }");

        Path src_m3 = src.resolve("m3x");

        tb.writeFile(src_m3.resolve("module-info.java"), "module m3x { requires m1x; }");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics", "--module-source-path", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:34: compiler.err.cyclic.requires: m3x"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that duplicate requires are detected.

     */

    @Test

    public void testDuplicateRequires(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1x");

        tb.writeFile(src_m1.resolve("module-info.java"), "module m1x { }");

        Path src_m2 = src.resolve("m2x");

        tb.writeFile(src_m2.resolve("module-info.java"), "module m2x { requires m1x; requires m1x; }");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics", "--module-source-path", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:37: compiler.err.duplicate.requires: m1x"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that duplicate requires are detected.

     */

    @Test

    public void testDuplicateRequiresTransitiveStatic(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1x");

        tb.writeFile(src_m1.resolve("module-info.java"), "module m1x { }");

        Path src_m2 = src.resolve("m2x");

        tb.writeFile(src_m2.resolve("module-info.java"), "module m2x { requires transitive m1x; requires static m1x; }");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics", "--module-source-path", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src))

                .run(Task.Expect.FAIL)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:55: compiler.err.duplicate.requires: m1x"))

            throw new Exception("expected output not found");

    }

    /**

     * Verify that duplicate exported packages are detected correctly.

     */

    @Test

    public void testConflictingExports_packages(Path base) throws Exception {

        verifyConflictingExports_packages(base,

                                          "exports p; exports q;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "exports p; exports p;",

                                          "module-info.java:1:33: compiler.err.conflicting.exports: p");

        verifyConflictingExports_packages(base,

                                          "exports p; opens p;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "exports p; exports p to m2x;",

                                          "module-info.java:1:33: compiler.err.conflicting.exports: p");

        verifyConflictingExports_packages(base,

                                          "exports p; opens p to m2x;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p; exports p;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p; opens p;",

                                          "module-info.java:1:29: compiler.err.conflicting.opens: p");

        verifyConflictingExports_packages(base,

                                          "opens p; exports p to m2x;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p; opens p to m2x;",

                                          "module-info.java:1:29: compiler.err.conflicting.opens: p");

        verifyConflictingExports_packages(base,

                                          "exports p to m2x; exports p;",

                                          "module-info.java:1:40: compiler.err.conflicting.exports: p");

        verifyConflictingExports_packages(base,

                                          "exports p to m2x; opens p;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "exports p to m2x; exports p to m2x;",

                                          "module-info.java:1:45: compiler.err.conflicting.exports.to.module: m2x");

        verifyConflictingExports_packages(base,

                                          "exports p to m2x; opens p to m2x;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p to m2x; exports p;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p to m2x; opens p;",

                                          "module-info.java:1:36: compiler.err.conflicting.opens: p");

        verifyConflictingExports_packages(base,

                                          "opens p to m2x; exports p to m2x;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p to m2x; opens p to m2x;",

                                          "module-info.java:1:36: compiler.err.conflicting.opens: p");

        verifyConflictingExports_packages(base,

                                          "exports p to m2x; exports p to m3x;",

                                          "module-info.java:1:40: compiler.err.conflicting.exports: p");

        verifyConflictingExports_packages(base,

                                          "exports p to m2x; opens p to m3x;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p to m2x; exports p to m3x;",

                                          null);

        verifyConflictingExports_packages(base,

                                          "opens p to m2x; opens p to m3x;",

                                          "module-info.java:1:36: compiler.err.conflicting.opens: p");

    }

    private void verifyConflictingExports_packages(Path base, String code, String expected) throws Exception {

        Files.createDirectories(base);

        tb.cleanDirectory(base);

        Path src = base.resolve("src");

        tb.writeJavaFiles(src.resolve("m1x"),

                          "module m1x { " + code + " }",

                          "package p; public class P {}",

                          "package q; public class Q {}");

        tb.writeJavaFiles(src.resolve("m2x"),

                          "module m2x { requires m1x; }");

        tb.writeJavaFiles(src.resolve("m3x"),

                          "module m3x { requires m1x; }");

        Path classes = base.resolve("classes");

        Files.createDirectories(classes);

        String log = new JavacTask(tb)

                .options("-XDrawDiagnostics",

                         "--module-source-path", src.toString())

                .outdir(classes)

                .files(findJavaFiles(src))

                .run(expected != null ? Task.Expect.FAIL : Task.Expect.SUCCESS)

                .writeAll()

                .getOutput(Task.OutputKind.DIRECT);

        if (expected != null && !log.contains(expected))

            throw new Exception("expected output not found, actual output: " + log);

    }

    /**

     * Verify that duplicate exported packages are detected.

     */

    @Test

    public void testConflictingExports_modules(Path base) throws Exception {

        Path src = base.resolve("src");

        Path src_m1 = src.resolve("m1x");

        tb.writeFile(src_m1.resolve("module-info.java"), "module m1x { }");

        Path src_m2 = src.resolve("m2x");

        tb.writeFile(src_m2.resolve("module-info.java"), "module m2x { exports p to m1x, m1x; }");