make a test for the countChar function to check for multiple occurrences and no occurrences of a character in a string

Author: gaireprakash20-ops

practice-tdd/count.test.js

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+// implement a function countChar that counts the number of times a character occurs in a string
+import { countChar } from "./count.js";
+// Given a string `str` and a single character `char` to search for,
+// When the countChar function is called with these inputs,
+// Then it should:
+
+// Scenario: Multiple Occurrences
+// Given the input string `str`,
+// And a character `char` that occurs one or more times in `str` (e.g., 'a' in 'aaaaa'),
+// When the function is called with these inputs,
+// Then it should correctly count occurrences of `char`.
+
+test("should count multiple occurrences of a character", () => {
+  const str = "aaaaa";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(5);
+});
+
+// Scenario: No Occurrences
+// Given the input string `str`,
+// And a character `char` that does not exist within `str`.
+// When the function is called with these inputs,
+// Then it should return 0, indicating that no occurrences of `char` were found.
+test("should return 0 when there is not repeated char in str", () => {
+  const str = "hello";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});