langtools/test/tools/javac/classfiles/InnerClasses/T8068517.java

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/** @test
 *  @bug 8068517
 *  @summary Verify that nested enums have correct abstract flag in the InnerClasses attribute.
 *  @library /tools/javac/lib
 *  @build ToolBox T8068517
 *  @run main T8068517
 */

import com.sun.tools.javac.util.Assert;
import java.io.File;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;

public class T8068517 {

    public static void main(String[] args) throws Exception {
        new T8068517().run();
    }

    void run() throws Exception {
        runTest("class A {\n" +
                "    enum AInner implements Runnable {\n" +
                "        A {\n" +
                "            public void run() {}\n" +
                "        };\n" +
                "    }\n" +
                "}\n",
                "class B {\n" +
                "    A.AInner a;\n" +
                "}");
        runTest("class A {\n" +
                "    enum AInner implements Runnable {\n" +
                "        A {\n" +
                "            public void run() {}\n" +
                "        };\n" +
                "    }\n" +
                "    AInner aInner;\n" +
                "}\n",
                "class B {\n" +
                "    void test(A a) {;\n" +
                "        switch (a.aInner) {\n" +
                "            case A: break;\n" +
                "        }\n" +
                "    };\n" +
                "}");
        runTest("class A {\n" +
                "    enum AInner implements Runnable {\n" +
                "        A {\n" +
                "            public void run() {}\n" +
                "        };\n" +
                "    }\n" +
                "    AInner aInner;\n" +
                "}\n",
                "class B {\n" +
                "    void test(A a) {;\n" +
                "        System.err.println(a.aInner.toString());\n" +
                "    };\n" +
                "}");
        runTest("class A {\n" +
                "    enum AInner implements Runnable {\n" +
                "        A {\n" +
                "            public void run() {}\n" +
                "        };\n" +
                "    }\n" +
                "    AInner aInner() {\n" +
                "        return null;\n" +
                "    }\n" +
                "}\n",
                "class B {\n" +
                "    void test(A a) {;\n" +
                "        System.err.println(a.aInner().toString());\n" +
                "    };\n" +
                "}");
    }

    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    int testN = 0;

    void runTest(String aJava, String bJava) throws Exception {
        File testClasses = new File(System.getProperty("test.classes"));
        File target1 = new File(testClasses, "T8068517s" + testN++);
        doCompile(target1, aJava, bJava);
        File target2 = new File(testClasses, "T8068517s" + testN++);
        doCompile(target2, bJava, aJava);

        Assert.check(Arrays.equals(Files.readAllBytes(new File(target1, "B.class").toPath()),
                                   Files.readAllBytes(new File(target2, "B.class").toPath())));
    }

    void doCompile(File target, String... sources) throws Exception {
        target.mkdirs();
        List<String> options = Arrays.asList("-d", target.getAbsolutePath());
        List<ToolBox.JavaSource> files = Stream.of(sources)
                                               .map(ToolBox.JavaSource::new)
                                               .collect(Collectors.toList());
        compiler.getTask(null, null, null, options, null, files).call();
    }
}