Create MinimumWindowSubstringTest.java

Author: Anubhav-pandey004

src/test/java/com/thealgorithms/slidingwindow/MinimumWindowSubstringTest.java

@@ -0,0 +1,23 @@
+package com.thealgorithms.slidingwindow;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests for the LongestSubstringWithoutRepeatingCharacters class.
+ *
+ * @author  (https://github.com/Chiefpatwal)
+ */
+public class MinimumWindowSubstringTest {
+
+    /**
+     * Tests for the longest subarray with a sum less than or equal to k.
+     */
+    @Test
+    public void testMinimumWindowSubstring() {
+        assertEquals(3, MinimumWindowSubstring.minWindow("ADOBECODEBANC","ABC"); // "BANC"
+        assertEquals(4, MinimumWindowSubstring.minWindow("a","a"); // "a"
+        assertEquals(2, MinimumWindowSubstring.minWindow("a","aa" // ""
+    }
+}