TestLengthNormModifierpublic class TestLengthNormModifier extends TestCase | Tests changing the norms after changing the simularity |
| Fields Summary |
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| public static byte | DEFAULT_NORM | | public static int | NUM_DOCS | | public Directory | store | | public static Similarity | sinverts the normal notion of lengthNorm |
| Constructors Summary |
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public TestLengthNormModifier(String name)
super(name);
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| Methods Summary |
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| public void | setUp()
IndexWriter writer = new
IndexWriter(store, new SimpleAnalyzer(), true);
IndexSearcher searcher;
for (int i = 0; i < NUM_DOCS; i++) {
Document d = new Document();
d.add(new Field("field", "word",
Field.Store.YES, Field.Index.TOKENIZED));
d.add(new Field("nonorm", "word",
Field.Store.YES, Field.Index.NO_NORMS));
for (int j = 1; j <= i; j++) {
d.add(new Field("field", "crap",
Field.Store.YES, Field.Index.TOKENIZED));
d.add(new Field("nonorm", "more words",
Field.Store.YES, Field.Index.NO_NORMS));
}
writer.addDocument(d);
}
writer.close();
| | public void | testFieldWithNoNorm()
IndexReader r = IndexReader.open(store);
byte[] norms = r.norms("nonorm");
// sanity check, norms should all be 1
assertTrue("Whoops we have norms?", !r.hasNorms("nonorm"));
for (int i = 0; i< norms.length; i++) {
assertEquals(""+i, DEFAULT_NORM, norms[i]);
}
r.close();
LengthNormModifier lnm = new LengthNormModifier(store, s);
try {
lnm.reSetNorms("nonorm");
} catch (Exception e) {
assertNull("caught something", e);
}
// nothing should have changed
r = IndexReader.open(store);
norms = r.norms("nonorm");
assertTrue("Whoops we have norms?", !r.hasNorms("nonorm"));
for (int i = 0; i< norms.length; i++) {
assertEquals(""+i, DEFAULT_NORM, norms[i]);
}
r.close();
| | public void | testGoodCases()
IndexSearcher searcher;
final float[] scores = new float[NUM_DOCS];
float lastScore = 0.0f;
// default similarity should put docs with shorter length first
searcher = new IndexSearcher(store);
searcher.search
(new TermQuery(new Term("field", "word")),
new HitCollector() {
public final void collect(int doc, float score) {
scores[doc] = score;
}
});
searcher.close();
lastScore = Float.MAX_VALUE;
for (int i = 0; i < NUM_DOCS; i++) {
String msg = "i=" + i + ", "+scores[i]+" <= "+lastScore;
assertTrue(msg, scores[i] <= lastScore);
//System.out.println(msg);
lastScore = scores[i];
}
// override the norms to be inverted
Similarity s = new DefaultSimilarity() {
public float lengthNorm(String fieldName, int numTokens) {
return (float)numTokens;
}
};
LengthNormModifier lnm = new LengthNormModifier(store, s);
lnm.reSetNorms("field");
// new norm (with default similarity) should put longer docs first
searcher = new IndexSearcher(store);
searcher.search
(new TermQuery(new Term("field", "word")),
new HitCollector() {
public final void collect(int doc, float score) {
scores[doc] = score;
}
});
searcher.close();
lastScore = 0.0f;
for (int i = 0; i < NUM_DOCS; i++) {
String msg = "i=" + i + ", "+scores[i]+" >= "+lastScore;
assertTrue(msg, scores[i] >= lastScore);
//System.out.println(msg);
lastScore = scores[i];
}
| | public void | testMissingField()
LengthNormModifier lnm = new LengthNormModifier(store, s);
try {
lnm.reSetNorms("nobodyherebutuschickens");
} catch (Exception e) {
assertNull("caught something", e);
}
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