improved test coverage

Author: cicirello

src/org/cicirello/sequences/distance/KendallTauSequenceDistance.java

@@ -813,12 +813,11 @@ static final class Node {
 	}
 
 	static class BaseHT {
-		private final int MAX_SIZE;
 		protected final int mask;
 		protected final int minSize;
 
 		BaseHT(int maxSize, int minSize) {
-			MAX_SIZE = maxSize;
+			final int MAX_SIZE = maxSize;
 			if (minSize > MAX_SIZE) {
 				minSize = MAX_SIZE;
 				mask = minSize - 1;

tests/org/cicirello/sequences/distance/SequenceDistanceTests.java

@@ -876,6 +876,37 @@ public void testKendallTauDistanceExceptions() {
 		);
 	}
 
+	@Test
+	public void testKendallTauSequenceDistance_HashTableBaseClass() {
+		class TestHT extends KendallTauSequenceDistance.BaseHT {
+			TestHT(int min) {
+				super(32, min);
+			}
+		}
+		for (int n = 1; n <= 32; n *= 2) {
+			TestHT ht = new TestHT(n);
+			assertEquals(n, ht.minSize);
+			assertEquals(n-1, ht.mask);
+		}
+		TestHT ht = new TestHT(3);
+		assertEquals(4, ht.minSize);
+		for (int n = 5; n < 8; n++) {
+			ht = new TestHT(n);
+			assertEquals(8, ht.minSize);
+			assertEquals(7, ht.mask);
+		}
+		for (int n = 9; n < 16; n++) {
+			ht = new TestHT(n);
+			assertEquals(16, ht.minSize);
+			assertEquals(15, ht.mask);
+		}
+		for (int n = 17; n <= 64; n++) {
+			ht = new TestHT(n);
+			assertEquals(32, ht.minSize);
+			assertEquals(31, ht.mask);
+		}
+	}
+	
 	@Test
 	public void testKendallTauDistanceExceptionsDiffElements() {
 		final KendallTauSequenceDistance d = new KendallTauSequenceDistance();