Sealed package quirk.

SealedQuirk.java

public class SealedQuirk {

    private static final String FOO = "foo", BAR = "bar", TMP = "tmp";

    private ClassLoader singleClassLoader, sealedChildClassLoader, sealedParentClassLoader;

    @Before
    public void setUp() throws Exception {
        File folder = Files.createTempDirectory(TMP).toFile();
        Manifest manifest = new Manifest();
        manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
        manifest.getMainAttributes().put(Attributes.Name.SEALED, Boolean.TRUE.toString());
        URL foo = new ByteBuddy().subclass(Object.class).name("sealed.Foo").make().toJar(new File(folder, FOO), manifest).toURI().toURL();
        URL bar = new ByteBuddy().subclass(Object.class).name("sealed.Bar").make().toJar(new File(folder, BAR)).toURI().toURL();
        singleClassLoader = new URLClassLoader(new URL[]{foo, bar});
        sealedChildClassLoader = new URLClassLoader(new URL[]{foo}, new URLClassLoader(new URL[] {bar}));
        sealedParentClassLoader = new URLClassLoader(new URL[]{bar}, new URLClassLoader(new URL[] {foo}));
    }

    @Test // throws exception
    public void testSingleClassLoaderSealedFirst() throws Exception {
        singleClassLoader.loadClass("sealed.Foo");
        singleClassLoader.loadClass("sealed.Bar");
    }

    @Test // throws exception
    public void testSealedParentClassLoaderSealedFirst() throws Exception {
        sealedParentClassLoader.loadClass("sealed.Foo");
        sealedParentClassLoader.loadClass("sealed.Bar");
    }

    @Test // throws exception
    public void testSealedChildClassLoaderSealedFirst() throws Exception {
        sealedChildClassLoader.loadClass("sealed.Foo");
        sealedChildClassLoader.loadClass("sealed.Bar");
    }

    @Test // throws no exception
    public void testSingleClassLoaderSealedLast() throws Exception {
        singleClassLoader.loadClass("sealed.Bar");
        singleClassLoader.loadClass("sealed.Foo");
    }

    @Test // throws no exception
    public void testSealedParentClassLoaderSealedLast() throws Exception {
        sealedParentClassLoader.loadClass("sealed.Bar");
        sealedParentClassLoader.loadClass("sealed.Foo");
    }

    @Test // throws exception
    public void testSealedChildClassLoaderSealedLast() throws Exception {
        sealedChildClassLoader.loadClass("sealed.Bar");
        sealedChildClassLoader.loadClass("sealed.Foo");
    }
}