test/tools/javac/modules/RepeatedUsesAndProvidesTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/**
 * @test 8145012
 * @summary Javac doesn't report errors on duplicate uses or provides
 * @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 RepeatedUsesAndProvidesTest
 */

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

public class RepeatedUsesAndProvidesTest extends ModuleTestBase {
    public static void main(String... args) throws Exception {
        RepeatedUsesAndProvidesTest t = new RepeatedUsesAndProvidesTest();
        t.runTests();
    }

    @Test
    void testDuplicateUses(Path base) throws Exception {
        Path src = base.resolve("src");
        tb.writeJavaFiles(src,
                "module m { uses p1.C1; uses p1.C1; }",
                "package p1; public class C1 {}");
        Path classes = base.resolve("classes");
        Files.createDirectories(classes);

        String log = tb.new JavacTask()
                .options("-XDrawDiagnostics")
                .outdir(classes)
                .files(findJavaFiles(src))
                .run(ToolBox.Expect.FAIL)
                .writeAll()
                .getOutput(ToolBox.OutputKind.DIRECT);
        if (!log.contains("module-info.java:1:24: compiler.err.duplicate.uses: p1.C1"))
            throw new Exception("expected output not found");
    }

    @Test
    void testDuplicateProvides(Path base) throws Exception {
        Path src = base.resolve("src");
        tb.writeJavaFiles(src,
                "module m { provides p1.C1 with p2.C2; provides p1.C1 with p2.C2; }",
                "package p1; public class C1 {}",
                "package p2; public class C2 extends p1.C1 {}");
        Path classes = base.resolve("classes");
        Files.createDirectories(classes);

        String log = tb.new JavacTask()
                .options("-XDrawDiagnostics")
                .outdir(classes)
                .files(findJavaFiles(src))
                .run(ToolBox.Expect.FAIL)
                .writeAll()
                .getOutput(ToolBox.OutputKind.DIRECT);
        if (!log.contains("module-info.java:1:39: compiler.err.duplicate.provides"))
            throw new Exception("expected output not found");
    }
}