update - count test when the string is empty - tdd

Author: abmhts

practice-tdd/count.test.js

@@ -26,6 +26,13 @@ test("should return 0 when character doesn't occur", () => {
   const str = "salam";
   const char = "b";
 
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+test("should return 0 when the string is empty", () => {
+  const str = "";
+  const char = "b";
+
   const count = countChar(str, char);
   expect(count).toEqual(0);
 });