NW | 25-ITP-Sep |Ahmad Hmedan | Sprint 3 | Sprint 3 Practice TDD coursework

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

@@ -1,5 +1,18 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let counter = 0;
+  let index = stringOfCharacters.indexOf(findCharacter);
+  while (index !== -1) {
+    counter++;
+
+    index = stringOfCharacters.indexOf(findCharacter, index + 1);
+  }
+  return counter;
 }
 
 module.exports = countChar;
+function assertFunction(currentOutput, targetOutput) {
+  console.assert(
+    currentOutput === targetOutput,
+    `expect ${currentOutput} to equal ${targetOutput}`
+  );
+}

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

@@ -22,3 +22,34 @@ 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("should return 0 when the character does not exist in the string ", () => {
+  const str = "Ahmad Hmedan";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should count a single occurrence when the character appears once",() => {
+  const str = "Ahmad Hmedan";
+  const char = "A";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+test("should count multiple occurrences when the character appears more than once", () => {
+  const str = "Ahmad Hmedan";
+  const char = "m";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});
+test("should return 0 when the string is empty", () => {
+  const str = "";
+  const char = "@";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+test("should correctly count special characters", () => {
+  const str = "Ahmadhm@gamil.com";
+  const char = "@";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});

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

@@ -1,5 +1,21 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  if (num <= 0) return "Invalid Input";
+  if (num % 100 === 11) return `${num}th`; // check the last two digit if it exception 11, 12 or 13
+  if (num % 100 === 12) return `${num}th`;
+  if (num % 100 === 13) return `${num}th`;
+  const remainder = num % 10;
+  switch (remainder) {
+    case 1:
+      return `${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

@@ -4,10 +4,36 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // continue testing and implementing getOrdinalNumber for additional cases
 // Write your tests using Jest - remember to run your tests often for continual feedback
 
-// Case 1: Identify the ordinal number for 1
-// When the number is 1,
-// Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
+
+test("append 'st' to numbers ending in 1, except those ending in 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(221)).toEqual("221st");
+  expect(getOrdinalNumber(191)).toEqual("191st");
+});
+test("append 'nd' to numbers ending in 2, except those ending in 12", () => {
+    expect( getOrdinalNumber(2) ).toEqual("2nd");
+    expect( getOrdinalNumber(22) ).toEqual("22nd");
+    expect( getOrdinalNumber(132) ).toEqual("132nd");
+});
+test("append 'rd' to numbers ending in 3, except those ending in 13", () => {
+    expect( getOrdinalNumber(3 )).toEqual("3rd");
+    expect( getOrdinalNumber(33 ) ).toEqual("33rd");
+    expect( getOrdinalNumber(133) ).toEqual("133rd");
+});
+
+
+test("append 'th'to numbers ending in 4-9 or ending with 11,12,13", () => {
+  expect(getOrdinalNumber(99)).toEqual("99th");
+  expect(getOrdinalNumber(234)).toEqual("234th");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(313)).toEqual("313th");
+});
+
+
+test("should throw Invalid Input for negative numbers or 0", () => {
+  expect(getOrdinalNumber(-5)).toEqual("Invalid Input");
+    expect(getOrdinalNumber(0)).toEqual("Invalid Input");
 });

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

@@ -1,5 +1,23 @@
-function repeat() {
-  return "hellohellohello";
+function repeat(myString, repeatNumber) {
+  if (repeatNumber < 0) throw new Error("Repeat count must be a positive number");
+  //  if I use this instead return how I can test it with jest??
+  return myString.repeat(repeatNumber);
 }
 
 module.exports = repeat;
+
+// Note:
+// When I wrote this code, I didn’t know there was already a built-in method for this.
+// Please review this implementation as well.
+//if (repeatNumber < 0) throw new Error("Repeat count must be a positive number"); if I use this instead return how I can test it with jest??
+
+// function repeat(myString, repeatNumber) {
+//   if (repeatNumber < 0) return "Invalid Input must be a positive number";
+// let str = "";
+// for (let i = 0; i < repeatNumber; i++) {
+//   str += myString;
+// }
+// return str;
+// }
+
+//if (repeatNumber < 0) throw new Error("Repeat count must be a positive number");

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

@@ -21,12 +21,43 @@ 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("should return the string", () => {
+  const str = "CYF";
+  const count = 1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("CYF");
+});
+
 // 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("should return empty when the count is 0", () => {
+  const str = "CYF";
+  const count = 0;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("");
+});
 // 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("should return empty when the count is negative", () => {
+  const str = "CYF";
+  const count = -2;
+
+  expect(() => repeat(str,count)).toThrow("Repeat count must be a positive number");
+});
+test("should repeat the string five times when the count is 5", () => {
+  const str = "CYF";
+  const count = 5;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("CYFCYFCYFCYFCYF");
+});
+test("should return an empty string when the str is empty whatever was count equal", () => {
+  const str = "";
+  const count = 10;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("");
+});