feat: implement countChar with tests

Author: arunkumarakilan

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

@@ -1,5 +1,12 @@
-function countChar(stringOfCharacters, findCharacter) {
-  return 5
+function countChar(str, char) {
+  let count = 0;
+  for (let i = 0; i < str.length; i++)
+  if(str[i] === char)
+  {
+    count++;
+  }
+  return count;
 }
 
+
 module.exports = countChar;

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

@@ -16,6 +16,12 @@ test("should count multiple occurrences of a character", () => {
   const count = countChar(str, char);
   expect(count).toEqual(5);
 });
+test("should count no occurrences of a character",()=>{
+  const str = "hello";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
 
 // Scenario: No Occurrences
 // Given the input string `str`,