pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / src / test / org / apache / lucene / util / TestVirtualMethod.java

diff --git a/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/util/TestVirtualMethod.java b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/util/TestVirtualMethod.java
new file mode 100644 (file)
index 0000000..2f41ad2
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/src/test/org/apache/lucene/util/TestVirtualMethod.java
@@ -0,0 +1,105 @@
+package org.apache.lucene.util;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+public class TestVirtualMethod extends LuceneTestCase {
+
+  private static final VirtualMethod<TestVirtualMethod> publicTestMethod =
+    new VirtualMethod<TestVirtualMethod>(TestVirtualMethod.class, "publicTest", String.class);
+  private static final VirtualMethod<TestVirtualMethod> protectedTestMethod =
+    new VirtualMethod<TestVirtualMethod>(TestVirtualMethod.class, "protectedTest", int.class);
+
+  public void publicTest(String test) {}
+  protected void protectedTest(int test) {}
+  
+  static class TestClass1 extends TestVirtualMethod {
+    @Override
+    public void publicTest(String test) {}
+    @Override
+    protected void protectedTest(int test) {}
+  }
+
+  static class TestClass2 extends TestClass1 {
+    @Override // make it public here
+    public void protectedTest(int test) {}
+  }
+
+  static class TestClass3 extends TestClass2 {
+    @Override
+    public void publicTest(String test) {}
+  }
+
+  static class TestClass4 extends TestVirtualMethod {
+  }
+
+  static class TestClass5 extends TestClass4 {
+  }
+
+  public void testGeneral() {
+    assertEquals(0, publicTestMethod.getImplementationDistance(this.getClass()));
+    assertEquals(1, publicTestMethod.getImplementationDistance(TestClass1.class));
+    assertEquals(1, publicTestMethod.getImplementationDistance(TestClass2.class));
+    assertEquals(3, publicTestMethod.getImplementationDistance(TestClass3.class));
+    assertFalse(publicTestMethod.isOverriddenAsOf(TestClass4.class));
+    assertFalse(publicTestMethod.isOverriddenAsOf(TestClass5.class));
+    
+    assertEquals(0, protectedTestMethod.getImplementationDistance(this.getClass()));
+    assertEquals(1, protectedTestMethod.getImplementationDistance(TestClass1.class));
+    assertEquals(2, protectedTestMethod.getImplementationDistance(TestClass2.class));
+    assertEquals(2, protectedTestMethod.getImplementationDistance(TestClass3.class));
+    assertFalse(protectedTestMethod.isOverriddenAsOf(TestClass4.class));
+    assertFalse(protectedTestMethod.isOverriddenAsOf(TestClass5.class));
+    
+    assertTrue(VirtualMethod.compareImplementationDistance(TestClass3.class, publicTestMethod, protectedTestMethod) > 0);
+    assertEquals(0, VirtualMethod.compareImplementationDistance(TestClass5.class, publicTestMethod, protectedTestMethod));
+  }
+
+  @SuppressWarnings("unchecked")
+  public void testExceptions() {
+    try {
+      // cast to Class to remove generics:
+      publicTestMethod.getImplementationDistance((Class) LuceneTestCase.class);
+      fail("LuceneTestCase is not a subclass and can never override publicTest(String)");
+    } catch (IllegalArgumentException arg) {
+      // pass
+    }
+    
+    try {
+      new VirtualMethod<TestVirtualMethod>(TestVirtualMethod.class, "bogus");
+      fail("Method bogus() does not exist, so IAE should be thrown");
+    } catch (IllegalArgumentException arg) {
+      // pass
+    }
+    
+    try {
+      new VirtualMethod<TestClass2>(TestClass2.class, "publicTest", String.class);
+      fail("Method publicTest(String) is not declared in TestClass2, so IAE should be thrown");
+    } catch (IllegalArgumentException arg) {
+      // pass
+    }
+
+    try {
+      // try to create a second instance of the same baseClass / method combination
+      new VirtualMethod<TestVirtualMethod>(TestVirtualMethod.class, "publicTest", String.class);
+      fail("Violating singleton status succeeded");
+    } catch (UnsupportedOperationException arg) {
+      // pass
+    }
+  }
+  
+}