ref: remove duplicated test data

Author: sozelfist

src/test/java/com/thealgorithms/dynamicprogramming/LevenshteinDistanceTests.java

@@ -2,26 +2,23 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import java.util.stream.Stream;
 import org.junit.jupiter.params.ParameterizedTest;
-import org.junit.jupiter.params.provider.CsvSource;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 
 public class LevenshteinDistanceTests {
+    private static final Object[][] TEST_CASES
+        = {{0, "", ""}, {0, "Hello, World!", "Hello, World!"}, {4, "", "Rust"}, {3, "horse", "ros"}, {6, "tan", "elephant"}, {8, "execute", "intention"}, {0, "", ""}, {0, "Hello, World!", "Hello, World!"}, {4, "", "Rust"}, {3, "horse", "ros"}, {6, "tan", "elephant"}, {8, "execute", "intention"}};
 
     @ParameterizedTest
-    @CsvSource({// String 1, String 2, Expected Distance
-        "'', '', 0", "'Hello, World!', 'Hello, World!', 0", "'', 'Rust', 4", "horse, ros, 3", "tan, elephant, 6", "execute, intention, 8"})
-    void
-    naiveLevenshteinDistanceTest(String str1, String str2, int expectedDistance) {
-        int result = LevenshteinDistance.naiveLevenshteinDistance(str1, str2);
-        assertEquals(expectedDistance, result);
+    @MethodSource("testCases")
+    void testLevenshteinDistance(int expectedDistance, String str1, String str2) {
+        assertEquals(expectedDistance, LevenshteinDistance.naiveLevenshteinDistance(str1, str2));
+        assertEquals(expectedDistance, LevenshteinDistance.optimizedLevenshteinDistance(str1, str2));
     }
 
-    @ParameterizedTest
-    @CsvSource({// String 1, String 2, Expected Distance
-        "'', '', 0", "'Hello, World!', 'Hello, World!', 0", "'', 'Rust', 4", "horse, ros, 3", "tan, elephant, 6", "execute, intention, 8"})
-    void
-    optimizedLevenshteinDistanceTest(String str1, String str2, int expectedDistance) {
-        int result = LevenshteinDistance.optimizedLevenshteinDistance(str1, str2);
-        assertEquals(expectedDistance, result);
+    private static Stream<Arguments> testCases() {
+        return Stream.of(TEST_CASES).map(args -> Arguments.of(args[0], args[1], args[2]));
     }
 }