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LUCENE-9592: Loosen equality checks in TestVectorUtil. (#2084) 

TestVectorUtil occasionally fails because of floating point errors. This
change slightly increases the epsilon in equality checks -- testing shows that
this will greatly decrease the chance of failure.
This commit is contained in:
Julie Tibshirani 2020-11-19 19:05:04 -08:00 committed by GitHub
parent c4d4767bca
commit 8c7b709c08
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1 changed files with 4 additions and 4 deletions
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8
lucene/core/src/test/org/apache/lucene/util/TestVectorUtil.java
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@ -25,7 +25,7 @@ public class TestVectorUtil extends LuceneTestCase {
public void testSelfDotProduct() {
// the dot product of a vector with itself is equal to the sum of the squares of its components
float[] v = randomVector();
assertEquals(l2(v), VectorUtil.dotProduct(v, v), 1e-5);
assertEquals(l2(v), VectorUtil.dotProduct(v, v), 1e-4);
}
public void testOrthogonalDotProduct() {
@ -36,13 +36,13 @@ public class TestVectorUtil extends LuceneTestCase {
float[] u = new float[2];
u[0] = v[1];
u[1] = -v[0];
assertEquals(0, VectorUtil.dotProduct(u, v), 1e-5);
assertEquals(0, VectorUtil.dotProduct(u, v), 1e-4);
}
public void testSelfSquareDistance() {
// the l2 distance of a vector with itself is zero
float[] v = randomVector();
assertEquals(0, VectorUtil.squareDistance(v, v), 1e-5);
assertEquals(0, VectorUtil.squareDistance(v, v), 1e-4);
}
public void testBasicSquareDistance() {
@ -53,7 +53,7 @@ public class TestVectorUtil extends LuceneTestCase {
// the square distance of a vector with its inverse is equal to four times the sum of squares of its components
float[] v = randomVector();
float[] u = negative(v);
assertEquals(4 * l2(v), VectorUtil.squareDistance(u, v), 1e-5);
assertEquals(4 * l2(v), VectorUtil.squareDistance(u, v), 1e-4);
}
private float l2(float[] v) {