add SpanNearQuery test case contributed by Paul Elschot - note, this test currently fails due to a bug.

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150284 13f79535-47bb-0310-9956-ffa450edef68

src/test/org/apache/lucene/search/spans/TestSpans.java

@@ -0,0 +1,101 @@
+package org.apache.lucene.search.spans;
+
+/**
+ * Copyright 2004 The Apache Software Foundation
+ *
+ * Licensed 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 org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.Hits;
+import org.apache.lucene.store.RAMDirectory;
+import org.apache.lucene.index.IndexWriter;
+import org.apache.lucene.index.Term;
+import org.apache.lucene.analysis.WhitespaceAnalyzer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import junit.framework.TestCase;
+
+import java.io.IOException;
+import java.util.Set;
+import java.util.TreeSet;
+
+public class TestSpans extends TestCase {
+  private IndexSearcher searcher;
+
+  public void setUp() throws Exception {
+    RAMDirectory directory = new RAMDirectory();
+    IndexWriter writer
+      = new IndexWriter(directory, new WhitespaceAnalyzer(), true);
+    //writer.infoStream = System.out;
+    StringBuffer buffer = new StringBuffer();
+    for (int i = 0; i < docFields.length; i++) {
+      Document doc = new Document();
+      doc.add(Field.Text(field, docFields[i]));
+      writer.addDocument(doc);
+    }
+    writer.close();
+    searcher = new IndexSearcher(directory);
+  }
+
+  private String[] docFields = {
+    "w1 w2 w3 w4 w5",
+    "w1 w3 w2 w3",
+    ""
+  };
+
+  public final String field = "field";
+
+  public Term makeTerm(String text) {return new Term(field, text);}
+
+  public SpanTermQuery makeSpanTermQuery(String text) {
+    return new SpanTermQuery(makeTerm(text));
+  }
+
+  public void testSpanNearOrdered02() throws Exception {
+    SpanTermQuery w1 = makeSpanTermQuery("w1");
+    SpanTermQuery w2 = makeSpanTermQuery("w2");
+    SpanTermQuery w3 = makeSpanTermQuery("w3");
+    int slop = 0;
+    boolean ordered = true;
+    SpanNearQuery snq = new SpanNearQuery( new SpanQuery[]{w1,w2,w3}, slop, ordered);
+    checkHits(snq, new int[] {0});
+  }
+
+  public void testSpanNearOrdered03() throws Exception {
+    SpanTermQuery w1 = makeSpanTermQuery("w1");
+    SpanTermQuery w2 = makeSpanTermQuery("w2");
+    SpanTermQuery w3 = makeSpanTermQuery("w3");
+    int slop = 1;
+    boolean ordered = true;
+    SpanNearQuery snq = new SpanNearQuery( new SpanQuery[]{w1,w2,w3}, slop, ordered);
+    checkHits(snq, new int[] {0,1});
+  }
+
+  private void checkHits(Query query, int[] results) throws IOException {
+    Hits hits = searcher.search(query);
+
+    Set correct = new TreeSet();
+    for (int i = 0; i < results.length; i++) {
+      correct.add(new Integer(results[i]));
+    }
+
+    Set actual = new TreeSet();
+    for (int i = 0; i < hits.length(); i++) {
+      actual.add(new Integer(hits.id(i)));
+    }
+
+    assertEquals(query.toString(field), correct, actual);
+  }
+}