1 package org.apache.lucene.index;
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20 import java.lang.reflect.Constructor;
21 import java.lang.reflect.Method;
22 import java.lang.reflect.Modifier;
23 import java.util.Arrays;
25 import org.apache.lucene.util.LuceneTestCase;
26 import org.junit.Test;
28 public class TestNoMergePolicy extends LuceneTestCase {
31 public void testNoMergePolicy() throws Exception {
32 MergePolicy mp = NoMergePolicy.NO_COMPOUND_FILES;
33 assertNull(mp.findMerges(null));
34 assertNull(mp.findMergesForOptimize(null, 0, null));
35 assertNull(mp.findMergesToExpungeDeletes(null));
36 assertFalse(mp.useCompoundFile(null, null));
41 public void testCompoundFiles() throws Exception {
42 assertFalse(NoMergePolicy.NO_COMPOUND_FILES.useCompoundFile(null, null));
43 assertTrue(NoMergePolicy.COMPOUND_FILES.useCompoundFile(null, null));
47 public void testFinalSingleton() throws Exception {
48 assertTrue(Modifier.isFinal(NoMergePolicy.class.getModifiers()));
49 Constructor<?>[] ctors = NoMergePolicy.class.getDeclaredConstructors();
50 assertEquals("expected 1 private ctor only: " + Arrays.toString(ctors), 1, ctors.length);
51 assertTrue("that 1 should be private: " + ctors[0], Modifier.isPrivate(ctors[0].getModifiers()));
55 public void testMethodsOverridden() throws Exception {
56 // Ensures that all methods of MergePolicy are overridden. That's important
57 // to ensure that NoMergePolicy overrides everything, so that no unexpected
58 // behavior/error occurs
59 for (Method m : NoMergePolicy.class.getMethods()) {
60 // getDeclaredMethods() returns just those methods that are declared on
61 // NoMergePolicy. getMethods() returns those that are visible in that
62 // context, including ones from Object. So just filter out Object. If in
63 // the future MergePolicy will extend a different class than Object, this
64 // will need to change.
65 if (m.getDeclaringClass() != Object.class) {
66 assertTrue(m + " is not overridden !", m.getDeclaringClass() == NoMergePolicy.class);