pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / analyzers / common / src / test / org / apache / lucene / analysis / position / PositionFilterTest.java

diff --git a/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/position/PositionFilterTest.java b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/position/PositionFilterTest.java
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+++ b/lucene-java-3.5.0/lucene/contrib/analyzers/common/src/test/org/apache/lucene/analysis/position/PositionFilterTest.java
@@ -0,0 +1,141 @@
+package org.apache.lucene.analysis.position;
+
+/**
+ * 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.
+ */
+
+import java.io.IOException;
+
+import org.apache.lucene.analysis.BaseTokenStreamTestCase;
+import org.apache.lucene.analysis.TokenStream;
+import org.apache.lucene.analysis.shingle.ShingleFilter;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+
+public class PositionFilterTest extends BaseTokenStreamTestCase {
+
+  public class TestTokenStream extends TokenStream {
+
+    protected int index = 0;
+    protected String[] testToken;
+    protected final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
+
+    public TestTokenStream(String[] testToken) {
+      super();
+      this.testToken = testToken;
+    }
+
+    @Override
+    public final boolean incrementToken() throws IOException {
+      clearAttributes();
+      if (index < testToken.length) {
+        termAtt.setEmpty().append(testToken[index++]);
+        return true;
+      } else {
+        return false;
+      }
+    }
+    @Override
+    public void reset() {
+      index = 0;
+    }
+  }
+
+  public static final String[] TEST_TOKEN = new String[]{
+    "please",
+    "divide",
+    "this",
+    "sentence",
+    "into",
+    "shingles",
+  };
+  public static final int[] TEST_TOKEN_POSITION_INCREMENTS = new int[]{
+    1, 0, 0, 0, 0, 0
+  };
+  public static final int[] TEST_TOKEN_NON_ZERO_POSITION_INCREMENTS = new int[]{
+    1, 5, 5, 5, 5, 5
+  };
+
+  public static final String[] SIX_GRAM_NO_POSITIONS_TOKENS = new String[]{
+    "please",
+    "please divide",
+    "please divide this",
+    "please divide this sentence",
+    "please divide this sentence into",
+    "please divide this sentence into shingles",
+    "divide",
+    "divide this",
+    "divide this sentence",
+    "divide this sentence into",
+    "divide this sentence into shingles",
+    "this",
+    "this sentence",
+    "this sentence into",
+    "this sentence into shingles",
+    "sentence",
+    "sentence into",
+    "sentence into shingles",
+    "into",
+    "into shingles",
+    "shingles",
+  };
+  public static final int[] SIX_GRAM_NO_POSITIONS_INCREMENTS = new int[]{
+    1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+  };
+  public static final String[] SIX_GRAM_NO_POSITIONS_TYPES = new String[]{
+    "word", "shingle", "shingle", "shingle", "shingle", "shingle",
+    "word", "shingle", "shingle", "shingle", "shingle",
+    "word", "shingle", "shingle", "shingle",
+    "word", "shingle", "shingle",
+    "word", "shingle",
+    "word"
+  };
+
+  public void testFilter() throws Exception {
+
+    assertTokenStreamContents(new PositionFilter(new TestTokenStream(TEST_TOKEN)),
+               TEST_TOKEN,
+               TEST_TOKEN_POSITION_INCREMENTS);
+  }
+
+  public void testNonZeroPositionIncrement() throws Exception {
+    
+    assertTokenStreamContents(new PositionFilter(new TestTokenStream(TEST_TOKEN), 5),
+               TEST_TOKEN,
+               TEST_TOKEN_NON_ZERO_POSITION_INCREMENTS);
+  }
+  
+  public void testReset() throws Exception {
+
+    PositionFilter filter = new PositionFilter(new TestTokenStream(TEST_TOKEN));
+    assertTokenStreamContents(filter, TEST_TOKEN, TEST_TOKEN_POSITION_INCREMENTS);
+    filter.reset();
+    // Make sure that the reset filter provides correct position increments
+    assertTokenStreamContents(filter, TEST_TOKEN, TEST_TOKEN_POSITION_INCREMENTS);
+  }
+  
+  /** Tests ShingleFilter up to six shingles against six terms.
+   *  Tests PositionFilter setting all but the first positionIncrement to zero.
+   * @throws java.io.IOException @see Token#next(Token)
+   */
+  public void test6GramFilterNoPositions() throws Exception {
+
+    ShingleFilter filter = new ShingleFilter(new TestTokenStream(TEST_TOKEN), 6);
+    assertTokenStreamContents(new PositionFilter(filter),
+               SIX_GRAM_NO_POSITIONS_TOKENS,
+               SIX_GRAM_NO_POSITIONS_INCREMENTS);
+  }
+
+}