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LUCENE-5207: add test for huge amounts of variables 

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5207@1523339 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Muir 2013-09-14 22:14:21 +00:00
parent 48bcf86367
commit 176334efcb
1 changed files with 32 additions and 0 deletions
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32
lucene/expressions/src/test/org/apache/lucene/expressions/TestDemoExpressions.java
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@ -110,4 +110,36 @@ public class TestDemoExpressions extends LuceneTestCase {
assertEquals(expected, actual, CheckHits.explainToleranceDelta(expected, actual));
}
}
/** tests huge amounts of variables in the expression */
public void testLotsOfBindings() throws Exception {
doTestLotsOfBindings(Byte.MAX_VALUE-1);
doTestLotsOfBindings(Byte.MAX_VALUE);
doTestLotsOfBindings(Byte.MAX_VALUE+1);
// TODO: ideally we'd test > Short.MAX_VALUE too, but compilation is currently recursive.
// so if we want to test such huge expressions, we need to instead change parser to use an explicit Stack
}
private void doTestLotsOfBindings(int n) throws Exception {
SimpleBindings bindings = new SimpleBindings();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < n; i++) {
if (i > 0) {
sb.append("+");
}
sb.append("x" + i);
bindings.add(new SortField("x" + i, SortField.Type.SCORE));
}
Expression expr = JavascriptCompiler.compile(sb.toString());
Sort sort = new Sort(expr.getSortField(bindings, true));
Query query = new TermQuery(new Term("body", "contents"));
TopFieldDocs td = searcher.search(query, null, 3, sort, true, true);
for (int i = 0; i < 3; i++) {
FieldDoc d = (FieldDoc) td.scoreDocs[i];
float expected = n*d.score;
float actual = ((Double)d.fields[0]).floatValue();
assertEquals(expected, actual, CheckHits.explainToleranceDelta(expected, actual));
}
}
}