count.test.js committed

Author: carlosyabreu

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

@@ -1,3 +1,5 @@
+/**
+ *
 // implement a function countChar that counts the number of times a character occurs in a string
 const countChar = require("./count");
 // Given a string `str` and a single character `char` to search for,
@@ -22,3 +24,88 @@ test("should count multiple occurrences of a character", () => {
 // 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.
+*
+*/
+
+// count.test.js
+
+// implement a function countChar that counts the number of times a character occurs in a string
+const countChar = require("./count");
+
+// Scenario: Multiple Occurrences
+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
+test("should return 0 when character does not exist in string", () => {
+  const str = "hello world";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Additional test cases to ensure robustness:
+
+// Scenario: Single Occurrence
+test("should count a single occurrence of a character", () => {
+  const str = "hello";
+  const char = "e";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+// Scenario: Character appears at the beginning and end
+test("should count character at beginning and end of string", () => {
+  const str = "abracadabra";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(5);
+});
+
+// Scenario: Case sensitivity
+test("should be case sensitive when counting characters", () => {
+  const str = "Hello World";
+  const char = "h";
+  const count = countChar(str, char);
+  expect(count).toEqual(0); // 'H' is uppercase, 'h' is lowercase
+});
+
+// Scenario: Character is a space
+test("should count spaces when searching for space character", () => {
+  const str = "hello world how are you";
+  const char = " ";
+  const count = countChar(str, char);
+  expect(count).toEqual(4);
+});
+
+// Scenario: Character is a number
+test("should count numeric characters", () => {
+  const str = "abc123abc123abc";
+  const char = "1";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});
+
+// Scenario: Empty string
+test("should return 0 when string is empty", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario: Character is longer than one character (edge case)
+test("should handle when char parameter is longer than one character", () => {
+  const str = "hello";
+  const char = "ll";
+  const count = countChar(str, char);
+  // Depending on requirements, this might count occurrences of the substring
+  // For this implementation, we'll specify it should count the first character only
+  expect(count).toEqual(2); // Counting 'l' occurrences
+});
+
+