jdk-24/langtools/test/tools/javac/modules/MultiModuleModeTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @summary tests for multi-module mode compilation
 * @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 ModuleTestBase
 * @run main MultiModuleModeTest
 */

import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class MultiModuleModeTest extends ModuleTestBase {

    public static void main(String... args) throws Exception {
        new MultiModuleModeTest().runTests();
    }

    @Test
    void testDuplicateModules(Path base) throws Exception {
        Path src = base.resolve("src");
        Path src_m1 = src.resolve("m1");
        tb.writeJavaFiles(src_m1, "module m1 { }");
        Path src_m2 = src.resolve("m2");
        tb.writeJavaFiles(src_m2, "module m1 { }");
        Path classes = base.resolve("classes");
        tb.createDirectories(classes);

        String log = tb.new JavacTask()
                .options("-XDrawDiagnostics",
                        "-modulesourcepath", src.toString())
                .outdir(classes)
                .files(findJavaFiles(src))
                .run(ToolBox.Expect.FAIL)
                .writeAll()
                .getOutput(ToolBox.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:1: compiler.err.duplicate.module: m1"))
            throw new Exception("expected output not found");
    }

    @Test
    void testCantFindModule(Path base) throws Exception {
        Path src = base.resolve("src");
        Path src_m1 = src.resolve("m1");
        tb.writeJavaFiles(src_m1, "module m1 { }");
        Path misc = base.resolve("misc");
        tb.writeJavaFiles(misc, "package p; class C { }");
        Path classes = base.resolve("classes");
        tb.createDirectories(classes);

        String log = tb.new JavacTask()
                .options("-XDrawDiagnostics",
                        "-modulesourcepath", src.toString())
                .outdir(classes)
                .files(join(findJavaFiles(src), findJavaFiles(misc)))
                .run(ToolBox.Expect.FAIL)
                .writeAll()
                .getOutput(ToolBox.OutputKind.DIRECT);

        if (!log.contains("C.java:1:1: compiler.err.unnamed.pkg.not.allowed.named.modules"))
            throw new Exception("expected output not found");
    }

    @Test
    void testModuleNameMismatch(Path base) throws Exception {
        Path src = base.resolve("src");
        Path src_m1 = src.resolve("m1");
        tb.writeJavaFiles(src_m1, "module m2 { }");
        Path classes = base.resolve("classes");
        tb.createDirectories(classes);

        String log = tb.new JavacTask()
                .options("-XDrawDiagnostics",
                        "-modulesourcepath", src.toString())
                .outdir(classes)
                .files(findJavaFiles(src))
                .run(ToolBox.Expect.FAIL)
                .writeAll()
                .getOutput(ToolBox.OutputKind.DIRECT);

        if (!log.contains("module-info.java:1:8: compiler.err.module.name.mismatch: m2, m1"))
            throw new Exception("expected output not found");
    }

    @Test
    void testImplicitModuleSource(Path base) throws Exception {
        Path src = base.resolve("src");
        tb.writeJavaFiles(src.resolve("m1"), "module m1 { }");
        tb.writeJavaFiles(src.resolve("m2"), "module m2 { requires m1; }");
        Path modules = base.resolve("modules");
        Files.createDirectories(modules);

        tb.new JavacTask()
                .options("-modulesourcepath", src.toString())
                .outdir(modules)
                .files(src.resolve("m2/module-info.java"))
                .run()
                .writeAll();
    }

    @Test
    void testImplicitModuleClass(Path base) throws Exception {
        Path src1 = base.resolve("src1");
        tb.writeJavaFiles(src1.resolve("m1"), "module m1 { }");
        Path modules1 = base.resolve("modules1");
        Files.createDirectories(modules1);

        tb.new JavacTask()
                .options("-modulesourcepath", src1.toString())
                .outdir(modules1)
                .files(src1.resolve("m1/module-info.java"))
                .run()
                .writeAll();

        Path src2= base.resolve("src2");
        tb.writeJavaFiles(src2.resolve("m2"), "module m2 { requires m1; }");
        Path modules2 = base.resolve("modules2");
        Files.createDirectories(modules2);

        tb.new JavacTask()
                .options("-modulepath", modules1.toString(),
                        "-modulesourcepath", src2.toString())
                .outdir(modules2)
                .files(src2.resolve("m2/module-info.java"))
                .run()
                .writeAll();
    }

    Path[] join(Path[] a, Path[] b) {
        List<Path> result = new ArrayList<>();
        result.addAll(Arrays.asList(a));
        result.addAll(Arrays.asList(b));
        return result.toArray(new Path[result.size()]);
    }
}