London | 26-ITP-May | Mandip Sanger| Sprint 3| Practice Tdd

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

@@ -1,5 +1,13 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] === findCharacter) {
+      count++;
+    }
+  }
+
+  return count;
 }
 
 module.exports = countChar;

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

@@ -5,7 +5,7 @@ const countChar = require("./count");
 // Then it should:
 
 // Scenario: Multiple Occurrences
-// Given the input string `str`,
+// Given the inpunt 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`.
@@ -19,6 +19,32 @@ test("should count multiple occurrences of a character", () => {
 
 // Scenario: No Occurrences
 // Given the input string `str`,
+
 // And a character `char` that does not exist within `str`.
+test("should return 0 for an empty string", () => {
+  const str = "";
+  const char = "a";
+
+  const count = countChar(str, char);
+
+  expect(count).toEqual(0);
+});
+
 // When the function is called with these inputs,
+test("should return 0 when the character does not occur in the string", () => {
+  const str = "hello";
+  const char = "z";
+
+  const count = countChar(str, char);
+
+  expect(count).toEqual(0);
+});
 // Then it should return 0, indicating that no occurrences of `char` were found.
+test("should return 0 when the character does not occur in the string", () => {
+  const str = "hello";
+  const char = "z";
+
+  const count = countChar(str, char);
+
+  expect(count).toEqual(0);
+});

Sprint-3/2-practice-tdd/get-ordinal-number.js

@@ -1,5 +1,15 @@
 function getOrdinalNumber(num) {
-  return "1st";
-}
+  if (num % 10 === 1 && num % 100 !== 11) {
+    return `${num}st`;
+  }
+  if (num % 10 === 2 && num % 100 !== 12) {
+    return `${num}nd`;
+  }
+
+  if (num % 10 === 3 && num % 100 !== 13) {
+    return `${num}rd`;
+  }
 
+  return `${num}th`;
+}
 module.exports = getOrdinalNumber;

Sprint-3/2-practice-tdd/get-ordinal-number.test.js

@@ -1,4 +1,3 @@
-const getOrdinalNumber = require("./get-ordinal-number");
 // In this week's prep, we started implementing getOrdinalNumber.
 
 // Continue testing and implementing getOrdinalNumber for additional cases.
@@ -12,9 +11,29 @@ const getOrdinalNumber = require("./get-ordinal-number");
 
 // Case 1: Numbers ending with 1 (but not 11)
 // When the number ends with 1, except those ending with 11,
-// Then the function should return a string by appending "st" to the number.
+
+const getOrdinalNumber = require("./get-ordinal-number");
+// Case 1: Numbers ending with 1 (but not 11)
 test("should append 'st' for numbers ending with 1, except those ending with 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// Case 2: Numbers ending with 11
+test('should append "th" when the number ends with 11', () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+// Then the function should return a string by appending "st" to the number.
+test('should append "th" when the number ends with 12', () => {
+  expect(getOrdinalNumber(12)).toEqual("12th");
+});
+test('should append "th" when the number is 13', () => {
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});
+test('should append "nd" when the number ends with 2', () => {
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+});
+test('should append "rd" when the number ends with 3', () => {
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+});

Sprint-3/2-practice-tdd/repeat-str.js

@@ -1,7 +1,15 @@
-function repeatStr() {
-  // Your implementation of this function must *not* call String.prototype.repeat (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat).
-  // The goal is to re-implement that function, not to use it.
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("Count cannot be negative");
+  }
+
+  let result = "";
+
+  for (let i = 0; i < count; i++) {
+    result += str;
+  }
+
+  return result;
 }
 
 module.exports = repeatStr;

Sprint-3/2-practice-tdd/repeat-str.test.js

@@ -20,13 +20,29 @@ test("should repeat the string count times", () => {
 // Given a target string `str` and a `count` equal to 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
+test("should repeat the string count times", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
 
 // Case: Handle count of 0:
 // Given a target string `str` and a `count` equal to 0,
 // When the repeatStr function is called with these inputs,
 // Then it should return an empty string.
+test("should repeat the string count times", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 
 // Case: Handle negative count:
 // Given a target string `str` and a negative integer `count`,
 // When the repeatStr function is called with these inputs,
 // Then it should throw an error, as negative counts are not valid.
+
+test("should throw an error when count is negative", () => {
+  expect(() => repeatStr("hello", -1)).toThrow();
+});