add unit test

1 files changed, 53 insertions, 0 deletions

diff --git a/config-model/src/test/java/com/yahoo/searchdefinition/document/HnswIndexParamsTestCase.java b/config-model/src/test/java/com/yahoo/searchdefinition/document/HnswIndexParamsTestCase.java
new file mode 100644
index 00000000000..6ecd937af46
--- /dev/null
+++ b/config-model/src/test/java/com/yahoo/searchdefinition/document/HnswIndexParamsTestCase.java
@@ -0,0 +1,53 @@
+
+
+package com.yahoo.searchdefinition.document;
+
+import org.junit.Test;
+
+import static org.hamcrest.core.Is.is;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+import static com.yahoo.searchdefinition.document.HnswIndexParams.DistanceMetric;
+
+public class HnswIndexParamsTestCase {
+
+    @Test
+    public void override_from() throws Exception {
+        var empty = new HnswIndexParams();
+        var builder = new HnswIndexParams.Builder();
+        builder.setMaxLinksPerNode(7);
+        var one = builder.build();
+        builder.setDistanceMetric("angular");
+        var two = builder.build();
+        builder.setNeighborsToExploreAtInsert(42);
+        var three = builder.build();
+        builder.setMaxLinksPerNode(17);
+        builder.setDistanceMetric("geodegrees");
+        builder.setNeighborsToExploreAtInsert(500);
+        var four = builder.build();
+
+        assertThat(empty.maxLinksPerNode(), is(16));
+        assertThat(empty.distanceMetric(), is(DistanceMetric.EUCLIDEAN));
+        assertThat(empty.neighborsToExploreAtInsert(), is(200));
+
+        assertThat(one.maxLinksPerNode(), is(7));
+        assertThat(two.distanceMetric(), is(DistanceMetric.ANGULAR));
+        assertThat(three.neighborsToExploreAtInsert(), is(42));
+
+        assertThat(four.maxLinksPerNode(), is(17));
+        assertThat(four.distanceMetric(), is(DistanceMetric.GEODEGREES));
+        assertThat(four.neighborsToExploreAtInsert(), is(500));
+
+        var five = four.overrideFrom(empty);
+        assertThat(five.maxLinksPerNode(), is(17));
+        assertThat(five.distanceMetric(), is(DistanceMetric.GEODEGREES));
+        assertThat(five.neighborsToExploreAtInsert(), is(500));
+
+        var six = four.overrideFrom(two);
+        assertThat(six.maxLinksPerNode(), is(7));
+        assertThat(six.distanceMetric(), is(DistanceMetric.ANGULAR));
+        assertThat(six.neighborsToExploreAtInsert(), is(500));
+    }
+
+}