Adding a jest test for 0 or empty string

Author: KayanatSuleman

Sprint-3/2-practice-tdd/count.test.js

@@ -17,6 +17,13 @@ test("should count multiple occurrences of a character", () => {
   expect(count).toEqual(5);
 });
 
+test("should return 0 when character does not occur in string", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+})
+
 // Scenario: No Occurrences
 // Given the input string `str`,
 // And a character `char` that does not exist within `str`.