pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / spatial / src / test / org / apache / lucene / spatial / geohash / TestGeoHashUtils.java

diff --git a/lucene-java-3.5.0/lucene/contrib/spatial/src/test/org/apache/lucene/spatial/geohash/TestGeoHashUtils.java b/lucene-java-3.5.0/lucene/contrib/spatial/src/test/org/apache/lucene/spatial/geohash/TestGeoHashUtils.java
new file mode 100644 (file)
index 0000000..42b56fb
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/spatial/src/test/org/apache/lucene/spatial/geohash/TestGeoHashUtils.java
@@ -0,0 +1,88 @@
+/**
+ * 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.lucene.spatial.geohash;
+
+import org.apache.lucene.util.LuceneTestCase;
+import org.junit.Test;
+
+/**
+ * Tests for {@link GeoHashUtils}
+ */
+public class TestGeoHashUtils extends LuceneTestCase {
+  
+  /**
+   * Pass condition: lat=42.6, lng=-5.6 should be encoded as "ezs42e44yx96",
+   * lat=57.64911 lng=10.40744 should be encoded as "u4pruydqqvj8"
+   */
+  @Test
+  public void testEncode() {
+    String hash = GeoHashUtils.encode(42.6, -5.6);
+    assertEquals("ezs42e44yx96", hash);
+    
+    hash = GeoHashUtils.encode(57.64911, 10.40744);
+    assertEquals("u4pruydqqvj8", hash);
+  }
+  
+  /**
+   * Pass condition: lat=52.3738007, lng=4.8909347 should be encoded and then
+   * decoded within 0.00001 of the original value
+   */
+  @Test
+  public void testDecodePreciseLongitudeLatitude() {
+    String hash = GeoHashUtils.encode(52.3738007, 4.8909347);
+    
+    double[] latitudeLongitude = GeoHashUtils.decode(hash);
+    
+    assertEquals(52.3738007, latitudeLongitude[0], 0.00001D);
+    assertEquals(4.8909347, latitudeLongitude[1], 0.00001D);
+  }
+  
+  /**
+   * Pass condition: lat=84.6, lng=10.5 should be encoded and then decoded
+   * within 0.00001 of the original value
+   */
+  @Test
+  public void testDecodeImpreciseLongitudeLatitude() {
+    String hash = GeoHashUtils.encode(84.6, 10.5);
+    
+    double[] latitudeLongitude = GeoHashUtils.decode(hash);
+    
+    assertEquals(84.6, latitudeLongitude[0], 0.00001D);
+    assertEquals(10.5, latitudeLongitude[1], 0.00001D);
+  }
+  
+  /*
+   * see https://issues.apache.org/jira/browse/LUCENE-1815 for details
+   */
+  @Test
+  public void testDecodeEncode() {
+    String geoHash = "u173zq37x014";
+    assertEquals(geoHash, GeoHashUtils.encode(52.3738007, 4.8909347));
+    double[] decode = GeoHashUtils.decode(geoHash);
+    assertEquals(52.37380061d, decode[0], 0.000001d);
+    assertEquals(4.8909343d, decode[1], 0.000001d);
+    
+    assertEquals(geoHash, GeoHashUtils.encode(decode[0], decode[1]));
+    
+    geoHash = "u173";
+    decode = GeoHashUtils.decode("u173");
+    geoHash = GeoHashUtils.encode(decode[0], decode[1]);
+    assertEquals(decode[0], GeoHashUtils.decode(geoHash)[0], 0.000001d);
+    assertEquals(decode[1], GeoHashUtils.decode(geoHash)[1], 0.000001d);
+  }
+}