Refactor to Parameterized tests

Author: Hardvan

src/test/java/com/thealgorithms/divideandconquer/MedianOfTwoSortedArraysTest.java

@@ -2,31 +2,42 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-import org.junit.jupiter.api.Test;
+import java.util.stream.Stream;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
 
 public class MedianOfTwoSortedArraysTest {
 
-    @Test
-    void testFindMedianSortedArrays() {
-        // Test case 1: Arrays of equal length
-        assertEquals(2.5, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {1, 3}, new int[] {2, 4}));
+    @ParameterizedTest
+    @MethodSource("provideTestCases")
+    void testFindMedianSortedArrays(int[] nums1, int[] nums2, double expectedMedian) {
+        assertEquals(expectedMedian, MedianOfTwoSortedArrays.findMedianSortedArrays(nums1, nums2));
+    }
+
+    // MethodSource that provides test cases as streams of arguments
+    private static Stream<Arguments> provideTestCases() {
+        return Stream.of(
+                // Test case 1: Arrays of equal length
+                Arguments.of(new int[] {1, 3}, new int[] {2, 4}, 2.5),
 
-        // Test case 2: Arrays of different lengths
-        assertEquals(2.0, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {1, 3}, new int[] {2}));
+                // Test case 2: Arrays of different lengths
+                Arguments.of(new int[] {1, 3}, new int[] {2}, 2.0),
 
-        // Test case 3: Arrays with even total length
-        assertEquals(4.5, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {1, 2, 8}, new int[] {3, 4, 5, 6, 7}));
+                // Test case 3: Arrays with even total length
+                Arguments.of(new int[] {1, 2, 8}, new int[] {3, 4, 5, 6, 7}, 4.5),
 
-        // Test case 4: Arrays with odd total length
-        assertEquals(3.5, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {1, 2, 8}, new int[] {3, 4, 5}));
+                // Test case 4: Arrays with odd total length
+                Arguments.of(new int[] {1, 2, 8}, new int[] {3, 4, 5}, 3.5),
 
-        // Test case 5: Single element arrays
-        assertEquals(2.0, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {1}, new int[] {3}));
+                // Test case 5: Single element arrays
+                Arguments.of(new int[] {1}, new int[] {3}, 2.0),
 
-        // Test case 6: Empty arrays
-        assertEquals(0.0, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {}, new int[] {0}));
+                // Test case 6: Empty arrays
+                Arguments.of(new int[] {}, new int[] {0}, 0.0),
 
-        // Test case 7: Same element arrays
-        assertEquals(2.0, MedianOfTwoSortedArrays.findMedianSortedArrays(new int[] {2, 2, 2}, new int[] {2, 2, 2}));
+                // Test case 7: Same element arrays
+                Arguments.of(new int[] {2, 2, 2}, new int[] {2, 2, 2}, 2.0)
+        );
     }
 }