Added tests

Author: TheRealHaui

src/test/java/org/apache/commons/text/similarity/LevenshteinDetailedDistanceTest.java

@@ -45,6 +45,10 @@ void testApplyWithNullSimilarityInput() {
                 () -> new LevenshteinDetailedDistance(0).apply(new SimilarityCharacterInput("asdf"), (SimilarityCharacterInput) null));
         assertThrows(IllegalArgumentException.class,
                 () -> new LevenshteinDetailedDistance(0).apply((SimilarityCharacterInput) null, new SimilarityCharacterInput("asdf")));
+        assertThrows(IllegalArgumentException.class,
+                () -> new LevenshteinDetailedDistance(null).apply(new SimilarityCharacterInput("asdf"), (SimilarityCharacterInput) null));
+        assertThrows(IllegalArgumentException.class,
+                () -> new LevenshteinDetailedDistance(null).apply((SimilarityCharacterInput) null, new SimilarityCharacterInput("asdf")));
     }
 
     @Test

src/test/java/org/apache/commons/text/similarity/LongestCommonSubsequenceTest.java

@@ -18,6 +18,7 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -133,4 +134,10 @@ void testLongestCommonSubsequenceApply() {
         assertEquals(4, subject.apply("leettteft", "ritttght"));
         assertEquals(15, subject.apply("the same string", "the same string"));
     }
+
+    @Test
+    void testLongestCommonSubstringLengthArray() {
+        assertArrayEquals(new int[][]{ {0, 0, 0, 0}, {0, 1, 1, 1}, {0, 1, 2, 2}}, subject.longestCommonSubstringLengthArray("ab", "abc"));
+    }
+
 }