public void TestCachingOfSentence() {
var generator = new CachedFeatureGenerator(identityGenerator);
const int testIndex = 0;
const int testIndex2 = testIndex + 1;
// after this call features are cached for testIndex
generator.CreateFeatures(features, testSentence1, testIndex, null);
Assert.AreEqual(1, generator.NumberOfCacheMisses);
Assert.AreEqual(0, generator.NumberOfCacheHits);
Assert.True(features.Contains(testSentence1[testIndex]));
features.Clear();
// check if features are really cached
var expectedToken = testSentence1[testIndex];
testSentence1[testIndex] = null;
generator.CreateFeatures(features, testSentence1, testIndex, null);
Assert.AreEqual(1, generator.NumberOfCacheMisses);
Assert.AreEqual(1, generator.NumberOfCacheHits);
Assert.True(features.Contains(expectedToken));
Assert.AreEqual(1, features.Count);
features.Clear();
// try caching with an other index
generator.CreateFeatures(features, testSentence1, testIndex2, null);
Assert.AreEqual(2, generator.NumberOfCacheMisses);
Assert.AreEqual(1, generator.NumberOfCacheHits);
Assert.True(features.Contains(testSentence1[testIndex2]));
features.Clear();
// now check if cache still contains feature for testIndex
generator.CreateFeatures(features, testSentence1, testIndex, null);
Assert.True(features.Contains(expectedToken));
}
public void TestCacheClearAfterSentenceChange() {
var generator = new CachedFeatureGenerator(identityGenerator);
const int testIndex = 0;
// use generator with sentence 1
generator.CreateFeatures(features, testSentence1, testIndex, null);
features.Clear();
// use another sentence but same index
generator.CreateFeatures(features, testSentence2, testIndex, null);
Assert.AreEqual(2, generator.NumberOfCacheMisses);
Assert.AreEqual(0, generator.NumberOfCacheHits);
Assert.True(features.Contains(testSentence2[testIndex]));
Assert.AreEqual(1, features.Count);
features.Clear();
// check if features are really cached
var expectedToken = testSentence2[testIndex];
testSentence2[testIndex] = null;
generator.CreateFeatures(features, testSentence2, testIndex, null);
Assert.True(features.Contains(expectedToken));
Assert.AreEqual(1, features.Count);
}