HBASE-1136 HashFunction inadvertently destroys some randomness; fixes broken build

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@735866 13f79535-47bb-0310-9956-ffa450edef68

src/test/org/apache/hadoop/hbase/filter/TestPrefixRowFilter.java

@@ -0,0 +1,103 @@
+/**
+ * Copyright 2009 The Apache Software Foundation
+ *
+ * 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.
+ */
+package org.apache.hadoop.hbase.filter;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.UnsupportedEncodingException;
+import java.util.Map;
+import java.util.TreeMap;
+
+import junit.framework.TestCase;
+
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.io.Cell;
+import org.apache.hadoop.hbase.regionserver.HLogEdit;
+import org.apache.hadoop.hbase.util.Bytes;
+
+/**
+ * Tests for a prefix row filter
+ */
+public class TestPrefixRowFilter extends TestCase {
+  RowFilterInterface mainFilter;
+  final char FIRST_CHAR = 'a';
+  final char LAST_CHAR = 'e';
+  final String HOST_PREFIX = "org.apache.site-";
+  static byte [] GOOD_BYTES = null;
+
+  static {
+    try {
+      GOOD_BYTES = "abc".getBytes(HConstants.UTF8_ENCODING);
+    } catch (UnsupportedEncodingException e) {
+      fail();
+    }
+  }
+
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+    this.mainFilter = new PrefixRowFilter(Bytes.toBytes(HOST_PREFIX));
+  }
+  
+  /**
+   * Tests filtering using a regex on the row key
+   * @throws Exception
+   */
+  public void testPrefixOnRow() throws Exception {
+    prefixRowTests(mainFilter);
+  }
+  
+  /**
+   * Test serialization
+   * @throws Exception
+   */
+  public void testSerialization() throws Exception {
+    // Decompose mainFilter to bytes.
+    ByteArrayOutputStream stream = new ByteArrayOutputStream();
+    DataOutputStream out = new DataOutputStream(stream);
+    mainFilter.write(out);
+    out.close();
+    byte[] buffer = stream.toByteArray();
+    
+    // Recompose filter.
+    DataInputStream in = new DataInputStream(new ByteArrayInputStream(buffer));
+    RowFilterInterface newFilter = new PrefixRowFilter();
+    newFilter.readFields(in);
+    
+    // Ensure the serialization preserved the filter by running all test.
+    prefixRowTests(newFilter);
+  }
+ 
+  private void prefixRowTests(RowFilterInterface filter) throws Exception {
+    for (char c = FIRST_CHAR; c <= LAST_CHAR; c++) {
+      byte [] t = createRow(c);
+      assertFalse("Failed with characer " + c, filter.filterRowKey(t));
+    }
+    String yahooSite = "com.yahoo.www";
+    assertTrue("Failed with character " +
+      yahooSite, filter.filterRowKey(Bytes.toBytes(yahooSite)));
+  }
+  
+  private byte [] createRow(final char c) {
+    return Bytes.toBytes(HOST_PREFIX + Character.toString(c));
+  }
+}

src/test/org/onelab/test/TestFilter.java

@@ -274,7 +274,7 @@ public class TestFilter extends TestCase {
     bf.add(k2);
     bf.add(k3);
     assertTrue(bf.membershipTest(key));
-    assertTrue(bf.membershipTest(new StringKey("graknyl")));
+    assertFalse(bf.membershipTest(k2));
     assertFalse(bf.membershipTest(new StringKey("xyzzy")));
     assertFalse(bf.membershipTest(new StringKey("abcd")));
 
@@ -287,7 +287,7 @@ public class TestFilter extends TestCase {
     bf2.add(key);
     bf.or(bf2);
     assertTrue(bf.membershipTest(key));
-    assertTrue(bf.membershipTest(new StringKey("graknyl")));
+    assertTrue(bf.membershipTest(k2));
     assertFalse(bf.membershipTest(new StringKey("xyzzy")));
     assertFalse(bf.membershipTest(new StringKey("abcd")));