Glasgow | 26-ITP-May | Sandani Kannangara | Sprint 3 | Practice Tdd

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

@@ -1,5 +1,8 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+  for (const c of stringOfCharacters) {
+    if (c === findCharacter) count++;
+  }
+  return count;
 }
-
 module.exports = countChar;

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

@@ -10,11 +10,41 @@ const countChar = require("./count");
 // When the function is called with these inputs,
 // Then it should correctly count occurrences of `char`.
 
-test("should count multiple occurrences of a character", () => {
+/*test("should count multiple occurrences of a character", () => {
   const str = "aaaaa";
   const char = "a";
   const count = countChar(str, char);
   expect(count).toEqual(5);
+});*/
+
+describe("countChar", () => {
+  test("counts repeated characters in a simple string", () => {
+    expect(countChar("aaaaa", "a")).toEqual(5);
+  });
+
+  test("counts characters in a mixed string", () => {
+    expect(countChar("absankama", "a")).toEqual(4);
+  });
+
+  test("counts characters including spaces", () => {
+    expect(countChar("ab san kama", "a")).toEqual(4);
+  });
+
+  test("counts characters in string with symbols", () => {
+    expect(countChar("a-+&£$%?/|b san kama", "a")).toEqual(4);
+  });
+
+  test("returns 0 when character is not found", () => {
+    expect(countChar("-+&£$%?/|b sn km", "a")).toEqual(0);
+  });
+
+  test("returns 0 for empty string", () => {
+    expect(countChar("", "a")).toEqual(0);
+  });
+
+  test("is case sensitive", () => {
+    expect(countChar("AaAa", "a")).toEqual(2);
+  });
 });
 
 // Scenario: No Occurrences

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

@@ -1,5 +1,11 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const endDigit = num % 10;
+  const endTwoDigits = num % 100;
+  if (endTwoDigits >= 11 && endTwoDigits <= 13) return num + "th";
+  if (endDigit === 1) return num + "st";
+  if (endDigit === 2) return num + "nd";
+  if (endDigit === 3) return num + "rd";
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -13,8 +13,36 @@ 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.
-test("should append 'st' for numbers ending with 1, except those ending with 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");
+});*/
+
+describe("getOrdinalNumber", () => {
+  test("appends th for numbers ending in 11, 12, or 13", () => {
+    expect(getOrdinalNumber(11)).toEqual("11th");
+    expect(getOrdinalNumber(12)).toEqual("12th");
+    expect(getOrdinalNumber(13)).toEqual("13th");
+    expect(getOrdinalNumber(111)).toEqual("111th");
+    expect(getOrdinalNumber(112)).toEqual("112th");
+    expect(getOrdinalNumber(113)).toEqual("113th");
+  });
+  test("appends st for numbers ending in 1 but not 11", () => {
+    expect(getOrdinalNumber(1)).toEqual("1st");
+    expect(getOrdinalNumber(131)).toEqual("131st");
+  });
+  test("appends nd for numbers ending in 2 but not 12", () => {
+    expect(getOrdinalNumber(2)).toEqual("2nd");
+    expect(getOrdinalNumber(932)).toEqual("932nd");
+  });
+  test("appends rd for numbers ending in 3 but not 13", () => {
+    expect(getOrdinalNumber(3)).toEqual("3rd");
+    expect(getOrdinalNumber(33)).toEqual("33rd");
+  });
+  test("appends th for all other numbers", () => {
+    expect(getOrdinalNumber(20)).toEqual("20th");
+    expect(getOrdinalNumber(24)).toEqual("24th");
+    expect(getOrdinalNumber(100)).toEqual("100th");
+  });
 });

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

@@ -1,7 +1,13 @@
-function repeatStr() {
+function repeatStr(str, count) {
   // 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";
+  let combinedStr = "";
+  if (count < 0) throw new Error("Invalid Count");
+
+  for (let i = 0; i < count; i++) {
+    combinedStr += str;
+  }
+  return combinedStr;
 }
 
 module.exports = repeatStr;

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

@@ -9,11 +9,26 @@ const repeatStr = require("./repeat-str");
 // When the repeatStr function is called with these inputs,
 // Then it should return a string that contains the original `str` repeated `count` times.
 
-test("should repeat the string count times", () => {
-  const str = "hello";
-  const count = 3;
-  const repeatedStr = repeatStr(str, count);
-  expect(repeatedStr).toEqual("hellohellohello");
+describe("repeatStr", () => {
+  test("repeats string count times when count is greater than 1", () => {
+    expect(repeatStr("hello", 3)).toEqual("hellohellohello");
+  });
+
+  test("returns original string when count is 1", () => {
+    expect(repeatStr("hello", 1)).toEqual("hello");
+  });
+
+  test("returns empty string when count is 0", () => {
+    expect(repeatStr("hello", 0)).toEqual("");
+  });
+
+  test("throws an error when count is negative", () => {
+    expect(() => repeatStr("hello", -3)).toThrow("Invalid Count");
+  });
+
+  test("returns empty string when the input string is empty", () => {
+    expect(repeatStr("", 3)).toEqual("");
+  });
 });
 
 // Case: handle count of 1: