test/tools/javac/modules/DuplicateClassTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 * @test
 * @summary Ensure that classes with the same FQNs are OK in unrelated modules.
 * @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 DuplicateClassTest
 */

import java.nio.file.Files;
import java.nio.file.Path;

public class DuplicateClassTest extends ModuleTestBase {

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

    @Test
    void testSimple(Path base) throws Exception {
        Path m1 = base.resolve("m1");
        Path m2 = base.resolve("m2");
        tb.writeJavaFiles(m1,
                          "module m1 { }",
                          "package impl; public class Impl { }");
        tb.writeJavaFiles(m2,
                          "module m2 { }",
                          "package impl; public class Impl { }");
        Path classes = base.resolve("classes");
        Files.createDirectories(classes);

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

        if (!log.isEmpty())
            throw new Exception("expected output not found; output: " + log);
    }

}