Implementing tests for interface methods and lambdas

dcevm/src/test/java8/com/github/dcevm/test/lambdas/LambdaTest.java

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+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package com.github.dcevm.test.lambdas;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.concurrent.Callable;
+
+import static com.github.dcevm.test.util.HotSwapTestHelper.__toVersion__;
+import static com.github.dcevm.test.util.HotSwapTestHelper.__version__;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Tests for lambda expressions
+ *
+ * @author Ivan Dubrov
+ */
+public class LambdaTest {
+
+  @Before
+  public void setUp() throws Exception {
+    __toVersion__(0);
+  }
+
+  // Version 0
+  public static class A {
+    public static Callable<Integer> createLambda() {
+      return A::value;
+    }
+
+    public static int value() {
+      return 1;
+    }
+  }
+
+  // Version 1
+  public static class A___1 {
+    public static Callable<Integer> createLambda() {
+      return A::value;
+    }
+
+    public static int value() {
+      return 2;
+    }
+  }
+
+  @Test
+  public void testStaticMethodLambda() throws Exception {
+    assert __version__() == 0;
+
+    Callable<Integer> lambda = A.createLambda();
+
+    assertEquals(1, (int) lambda.call());
+
+    __toVersion__(1);
+
+    assertEquals(2, (int) lambda.call());
+
+    __toVersion__(0);
+    assert __version__() == 0;
+  }
+}

dcevm/src/test/java8/com/github/dcevm/test/methods/InterfaceMethodsTest.java

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+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+package com.github.dcevm.test.methods;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+
+import static com.github.dcevm.test.util.HotSwapTestHelper.__toVersion__;
+import static com.github.dcevm.test.util.HotSwapTestHelper.__version__;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Tests for replacing static methods in interfaces.
+ *
+ * @author Ivan Dubrov
+ */
+public class InterfaceMethodsTest {
+
+  @Before
+  public void setUp() throws Exception {
+    __toVersion__(0);
+  }
+
+  // Version 0
+  public static interface A {
+    public static int staticMethod() {
+      return 1;
+    }
+  }
+
+  // Version 1
+  public static interface A___1 {
+    public static long staticMethod() {
+      return 2;
+    }
+  }
+
+  @Test
+  public void testStaticInterfaceMethods() throws Throwable {
+    assert __version__() == 0;
+
+    MethodHandle handle =
+            MethodHandles.publicLookup().findStatic(A.class, "staticMethod", MethodType.methodType(int.class));
+
+    assertEquals(1, A.staticMethod());
+    assertEquals(1, handle.invoke());
+
+    __toVersion__(1);
+
+    assertEquals(2, A.staticMethod());
+    assertEquals(2, handle.invoke());
+
+    __toVersion__(0);
+  }
+}