MarcusSorealheis commented on code in PR #12208:
URL: https://github.com/apache/lucene/pull/12208#discussion_r1158142961
##########
lucene/sandbox/src/test/org/apache/lucene/sandbox/search/TestTermAutomatonQuery.java:
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@@ -842,6 +844,95 @@ public void testRewriteSimplePhrase() throws Exception {
IOUtils.close(w, r, dir);
}
+ public void testExplainNonMatchingDocument() throws Exception {
+ TermAutomatonQuery q = new TermAutomatonQuery("field");
+ int initState = q.createState();
+ int s1 = q.createState();
+ int s2 = q.createState();
+ q.addTransition(initState, s1, "xml");
+ q.addTransition(s1, s2, "json");
+ q.setAccept(s2, true);
+ q.finish();
+
+ Directory dir = newDirectory();
+ RandomIndexWriter w = new RandomIndexWriter(random(), dir);
+ Document doc = new Document();
+ doc.add(newTextField("field", "protobuf", Field.Store.NO));
+ w.addDocument(doc);
+
+ IndexReader r = w.getReader();
+ IndexSearcher searcher = newSearcher(r);
+ Query rewrite = q.rewrite(searcher);
+ assertTrue(rewrite instanceof PhraseQuery);
+
+ TopDocs topDocs = searcher.search(rewrite, 10);
+ assertEquals(0, topDocs.totalHits.value);
+
+ for (ScoreDoc scoreDoc : topDocs.scoreDocs) {
+ Explanation explanation = searcher.explain(rewrite, scoreDoc.doc);
+ assertNotNull("Explanation should not be null", explanation);
+ assertTrue(
+ "Explanation score should match the actual score",
+ Float.compare(scoreDoc.score, (Float) explanation.getValue()) == 0);
+ }
+
+ IOUtils.close(w, r, dir);
+ }
+
+ // TODO: improve experience of working with explain
+
Review Comment:
Fixed in:
[f91ef20](https://github.com/apache/lucene/pull/12208/commits/f91ef20e5ea706b00c3bf438d9d0b937c146d747)
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