Manchester | 26-ITP-September | khalidbih | Sprint 3 | 2-practice-tdd

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

@@ -1,5 +1,12 @@
 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

@@ -22,3 +22,24 @@ test("should count multiple occurrences of a character", () => {
 // And a character char that does not exist within the case-sensitive str,
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of the char were found in the case-sensitive str.
+
+test("returns 0 if the character is not in the string", () => {
+  const str = "bread";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toBe(0);
+});
+
+test("counts a character that appears once", () => {
+  const str = "bread";
+  const char = "d";
+  const count = countChar(str, char);
+  expect(count).toBe(1);
+});
+
+test("counts how many times a character appears", () => {
+  const str = "breadboard";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toBe(2);
+});

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

@@ -1,5 +1,19 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const lastTwoDigits = num % 100;
+  if (lastTwoDigits >= 11 && lastTwoDigits <= 13){
+    return num+ "th";
+  }
+  const lastDigit = num %10;
+  switch (lastDigit){
+    case 1:
+      return num + "st";
+    case 2:
+      return num + "nd";
+    case 3:
+      return num + "rd";
+    default:
+      return num + "th";
+  }
 }
 
 module.exports = getOrdinalNumber;

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

@@ -8,6 +8,43 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number is 1,
 // Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
+test("1 becomes '1st'", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
 });
+
+test("2 becomes '2nd'", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+
+test("3 becomes '3rd'", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+
+test("4 becomes '4th'", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});
+
+test("11, 12, 13 and 111, 112, 113 all become 'th' endings", () => {
+  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("21, 22, 23 and 101, 102, 103 get correct 'st', 'nd', 'rd' endings", () => {
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(101)).toEqual("101st");
+  expect(getOrdinalNumber(102)).toEqual("102nd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
+});
+
+test("5, 10, 24, 100 all end with 'th'", () => {
+  expect(getOrdinalNumber(5)).toEqual("5th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(24)).toEqual("24th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
+});

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

@@ -1,5 +1,8 @@
-function repeat() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("count cannot be negative");
+  }
+  return str.repeat(count);
 }
 
-module.exports = repeat;
+module.exports = repeatStr;

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

@@ -1,5 +1,5 @@
 // Implement a function repeat
-const repeat = require("./repeat");
+const repeatStr = require("./repeat");
 // Given a target string str and a positive integer count,
 // When the repeat function is called with these inputs,
 // Then it should:
@@ -12,7 +12,7 @@ const repeat = require("./repeat");
 test("should repeat the string count times", () => {
   const str = "hello";
   const count = 3;
-  const repeatedStr = repeat(str, count);
+  const repeatedStr = repeatStr(str, count); 
   expect(repeatedStr).toEqual("hellohellohello");
 });
 
@@ -21,12 +21,32 @@ test("should repeat the string count times", () => {
 // When the repeat function is called with these inputs,
 // Then it should return the original str without repetition, ensuring that a count of 1 results in no repetition.
 
+test("returns the original string when count is 1", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toBe("hello");
+});
+
 // case: Handle Count of 0:
 // Given a target string str and a count equal to 0,
 // When the repeat function is called with these inputs,
 // Then it should return an empty string, ensuring that a count of 0 results in an empty output.
 
+test("returns an empty string when count is 0", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toBe("");
+});
+
 // case: Negative Count:
 // Given a target string str and a negative integer count,
 // When the repeat function is called with these inputs,
 // Then it should throw an error or return an appropriate error message, as negative counts are not valid.
+
+test("throws an error when count is negative", () => {
+  const str = "hello";
+  const count = -3;
+  expect(() => repeatStr(str, count)).toThrow("count cannot be negative");
+});