TestMainWithoutEnclosing.java

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import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * @test
 * @bug 8076264
 * @summary Launching app shouldn't require enclosing class for the main class.
 * @compile TestMainWithoutEnclosing.java
 * @run main TestMainWithoutEnclosing
 */
public final class TestMainWithoutEnclosing extends TestHelper {

    static final String EnclosingName = "Enclosing";

    static void createJarFile(File testJar) throws IOException {
        List<String> scratch = new ArrayList<>();
        scratch.add("public class Enclosing {");
        scratch.add("    public static final class Main {");
        scratch.add("        public static void main(String... args) {");
        scratch.add("            System.out.println(\"Hello World\");");
        scratch.add("        }");
        scratch.add("    }");
        scratch.add("}");
        File enclosingFile = new File(EnclosingName + ".java");
        createFile(enclosingFile, scratch);
        compile(enclosingFile.getName());
        // avoid side effects remove the Enclosing class
        getClassFile(enclosingFile).delete();
        createJar("cvfe", testJar.getName(), EnclosingName + "$Main",
                EnclosingName + "$Main" + ".class");
        // remove extraneous files in the current directory
        new File(EnclosingName + "$Main" + ".class").delete();
    }

    public static void main(String... args) throws IOException {
        File testJarFile = new File("test.jar");
        createJarFile(testJarFile);
        TestResult tr = doExec(javaCmd, "-jar", testJarFile.getName());
        if (!tr.isOK()) {
            System.out.println(tr);
            throw new RuntimeException("test returned non-positive value");
        }
        if (!tr.contains("Hello World")) {
            System.out.println(tr);
            throw new RuntimeException("expected output not found");
        }
    }
}