Speed up slow tests (#15212)

build-tools/build-infra/src/main/java/org/apache/lucene/gradle/plugins/java/TestsAndRandomizationPlugin.java

@@ -165,6 +165,8 @@ public void apply(Project project) {
             "tests.verbose",
             "Enables verbose test output mode (emits full test outputs immediately).",
             false);
+    optionsInheritedAsProperties.add("tests.verbose");
+
     Provider<Boolean> haltOnFailureOption =
         buildOptions.addBooleanOption(
             "tests.haltonfailure", "Stop processing on test failures.", true);

lucene/core/src/test/org/apache/lucene/search/TestShardSearching.java

@@ -70,6 +70,7 @@ public PreviousSearchState(
     }
   }
 
+  @Nightly // TODO: -Ptests.seed=A148FC8983CFA7A - takes 12 seconds. very slow. wall-clock dependent
   public void testSimple() throws Exception {
     final int numNodes = TestUtil.nextInt(random(), 1, 10);
 

lucene/core/src/test/org/apache/lucene/util/TestPriorityQueue.java

@@ -18,10 +18,12 @@
 
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
-import static org.hamcrest.Matchers.lessThanOrEqualTo;
 
+import com.carrotsearch.randomizedtesting.Xoroshiro128PlusRandom;
+import com.carrotsearch.randomizedtesting.generators.RandomNumbers;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.NoSuchElementException;
@@ -30,7 +32,6 @@
 import org.apache.lucene.tests.util.TestUtil;
 import org.hamcrest.Matchers;
 
-@SuppressWarnings("BoxedPrimitiveEquality")
 public class TestPriorityQueue extends LuceneTestCase {
 
   private static class IntegerQueue extends PriorityQueue<Integer> {
@@ -208,59 +209,48 @@ public void testAddAllDoesNotFitIntoQueue() {
         () -> pq.addAll(list));
   }
 
-  // TODO: incredibly slow
-  @Nightly
+  /** Randomly add and remove elements, comparing against the reference java.util.PriorityQueue. */
   public void testRemovalsAndInsertions() {
-    Random random = random();
-    int numDocsInPQ = TestUtil.nextInt(random, 1, 100);
-    IntegerQueue pq = new IntegerQueue(numDocsInPQ);
-    Integer lastLeast = null;
-
-    // Basic insertion of new content
-    ArrayList<Integer> sds = new ArrayList<>(numDocsInPQ);
-    for (int i = 0; i < numDocsInPQ * 10; i++) {
-      Integer newEntry = Math.abs(random.nextInt());
-      sds.add(newEntry);
-      Integer evicted = pq.insertWithOverflow(newEntry);
-      pq.checkValidity();
-      if (evicted != null) {
-        assertTrue(sds.remove(evicted));
-        if (evicted != newEntry) {
-          assertSame(evicted, lastLeast);
+    int maxElement = RandomNumbers.randomIntBetween(random(), 1, 10_000);
+    int size = maxElement / 2 + 1;
+
+    var reference = new java.util.PriorityQueue<Integer>();
+    var pq = new IntegerQueue(size);
+
+    Random localRandom = new Xoroshiro128PlusRandom(random().nextLong());
+
+    // Lucene's PriorityQueue.remove uses reference equality, not .equals to determine which
+    // elements
+    // to remove (!).
+    HashMap<Integer, Integer> ints = new HashMap<>();
+
+    for (int i = 0, iters = size * 2; i < iters; i++) {
+      Integer element = ints.computeIfAbsent(localRandom.nextInt(maxElement), k -> k);
+
+      var action = localRandom.nextInt(100);
+      if (action < 25) {
+        // removals, possibly misses.
+        assertEquals("remove() difference: " + i, reference.remove(element), pq.remove(element));
+      } else {
+        // additions.
+        var dropped = pq.insertWithOverflow(element);
+
+        reference.add(element);
+        Integer droppedReference;
+        if (reference.size() > size) {
+          droppedReference = reference.remove();
+        } else {
+          droppedReference = null;
         }
-      }
-      Integer newLeast = pq.top();
-      if ((lastLeast != null) && (newLeast != newEntry) && (newLeast != lastLeast)) {
-        // If there has been a change of least entry and it wasn't our new
-        // addition we expect the scores to increase
-        assertThat(newLeast, lessThanOrEqualTo(newEntry));
-        assertThat(newLeast, greaterThanOrEqualTo(lastLeast));
-      }
-      lastLeast = newLeast;
-    }
 
-    // Try many random additions to existing entries - we should always see
-    // increasing scores in the lowest entry in the PQ
-    for (int p = 0; p < 500000; p++) {
-      int element = (int) (random.nextFloat() * (sds.size() - 1));
-      Integer objectToRemove = sds.get(element);
-      assertSame(sds.remove(element), objectToRemove);
-      assertTrue(pq.remove(objectToRemove));
-      pq.checkValidity();
-      Integer newEntry = Math.abs(random.nextInt());
-      sds.add(newEntry);
-      assertNull(pq.insertWithOverflow(newEntry));
-      pq.checkValidity();
-      Integer newLeast = pq.top();
-      if ((objectToRemove != lastLeast) && (lastLeast != null) && (newLeast != newEntry)) {
-        // If there has been a change of least entry and it wasn't our new
-        // addition or the loss of our randomly removed entry we expect the
-        // scores to increase
-        assertThat(newLeast, lessThanOrEqualTo(newEntry));
-        assertThat(newLeast, greaterThanOrEqualTo(lastLeast));
+        assertEquals("insertWithOverflow() difference.", dropped, droppedReference);
       }
-      lastLeast = newLeast;
+
+      assertEquals("insertWithOverflow() size difference?", reference.size(), pq.size());
+      assertEquals("top() difference?", reference.peek(), pq.top());
     }
+
+    pq.checkValidity();
   }
 
   public void testIteratorEmpty() {

lucene/misc/src/test/org/apache/lucene/misc/index/TestBPReorderingMergePolicy.java

@@ -75,7 +75,7 @@ public void testReorderOnMerge() throws IOException {
     KnnFloatVectorField vectorField = new KnnFloatVectorField("vector", new float[] {0});
     doc.add(vectorField);
 
-    for (int i = 0; i < 10000; ++i) {
+    for (int i = 0; i < 1000; ++i) {
       idField.setStringValue(Integer.toString(i));
       int intValue = i % 2 == 0 ? 0 : i % 10;
       bodyField.setStringValue(Integer.toString(intValue));
@@ -158,7 +158,7 @@ public void testReorderOnAddIndexes() throws IOException {
     KnnFloatVectorField vectorField = new KnnFloatVectorField("vector", new float[] {0});
     doc.add(vectorField);
 
-    for (int i = 0; i < 10000; ++i) {
+    for (int i = 0; i < 1000; ++i) {
       idField.setStringValue(Integer.toString(i));
       int intValue = i % 2 == 0 ? 0 : i % 10;
       bodyField.setStringValue(Integer.toString(intValue));
@@ -171,7 +171,7 @@ public void testReorderOnAddIndexes() throws IOException {
       }
     }
 
-    for (int i = 0; i < 10000; i += 10) {
+    for (int i = 0; i < 1000; i += 10) {
       w1.deleteDocuments(new Term("id", Integer.toString(i / 3)));
     }