Manchester | 26-ITP-Jan | Mehroz Munir | Sprint 3 | Practice TDD Coursework

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

@@ -1,5 +1,6 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  if (findCharacter.length === 0 || stringOfCharacters.length === 0) return 0;
+  else return stringOfCharacters.split(findCharacter).length - 1;
 }
 
 module.exports = countChar;

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

@@ -4,7 +4,7 @@ const countChar = require("./count");
 // When the countChar function is called with these inputs,
 // Then it should:
 
-// Scenario: Multiple Occurrences
+// Scenario 1: Multiple Occurrences
 // Given the input 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,
@@ -17,8 +17,81 @@ test("should count multiple occurrences of a character", () => {
   expect(count).toEqual(5);
 });
 
-// Scenario: No Occurrences
+// Scenario 2: No Occurrences
 // Given the input string `str`,
 // 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.
+
+test("should return 0 if there are no occurrences of a character", () => {
+  const str = "there is no two number here";
+  const char = "2";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario 3: Single Occurrence
+// Given the input string `str`,
+// And a character `char` that exists only once within `str`.
+// When the function is called with these inputs,
+// Then it should return 1, indicating that single occurrence of `char` were found.
+
+test("should return 1 if there is single occurrence of a character", () => {
+  const str = " let's find if we got what you are looking for";
+  const char = "'";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+// Scenario 4: Zero occurrence when the string is empty
+// Given the input string `str` which is empty,
+// And a character `char` that can't be existed in the `str` as it is empty.
+// When the function is called with these inputs,
+// Then it should return 0, indicating that empty string can't hold that char.
+
+test("should return 0 as the string is empty", () => {
+  const str = "";
+  const char = "2";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario 5: Multiple occurrences if the string contains single empty spaces and our char is an empty space
+// Given the input string `str` that contains ' ' empty spaces,
+// And a character `char` which is just single empty space ' '.
+// When the function is called with these inputs,
+// Then it should return the number of occurrences of single empty spaces in the string.
+
+test("should return multiple occurrences of empty spaces in the string", () => {
+  const str = "Hi I have got ten single empty spaces in this string.";
+  const char = " ";
+  const count = countChar(str, char);
+  expect(count).toEqual(10);
+});
+
+// Scenario 6: No occurrences if the char is just an empty char
+// Given the input string `str` that contains any number of characters or no characters at all,
+// And a character `char` which is empty ''.
+// When the function is called with these inputs,
+// Then it should return 0 as there is nothing to count as the char is just empty.
+
+test("should return 0 as the char is just empty", () => {
+  const str =
+    "Hi I am a string that can be empty or not empty but I can't count empty characters.";
+  const char = "";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario 7: Multiple Occurrences at different places
+// Given the input string `str`,
+// And a character `char` that occurs more than one times in `str` (e.g., 'a' in 'add the angle to the antenna'),
+// When the function is called with these inputs,
+// Then it should correctly count occurrences of `char` a in the string.
+
+test("should count multiple occurrences of a character", () => {
+  const str = "add the angle to the antenna";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(4);
+});

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

@@ -1,5 +1,12 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  let numberString = String(num);
+  lastTwoCharactersNumberString = numberString.slice(-2);
+  lastCharacterNumberString = numberString.slice(-1);
+  if (lastTwoCharactersNumberString === "11") return num + "th";
+  else if (lastCharacterNumberString === "1") return num + "st";
+  else if (lastCharacterNumberString === "2") return num + "nd";
+  else if (lastCharacterNumberString === "3") return num + "rd";
+  else return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -17,4 +17,49 @@ 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");
+  expect(getOrdinalNumber(-171)).toEqual("-171st");
+});
+
+// Case 2: Special case for number 11)
+// When the number is 11 or the numbers ends with 11,
+// Then the function should return a string by appending "th" to the number.
+test("should append 'th' for number 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(12211)).toEqual("12211th");
+  expect(getOrdinalNumber(98011)).toEqual("98011th");
+  expect(getOrdinalNumber(-87611)).toEqual("-87611th");
+});
+
+// Case 3: Numbers ending with 2
+// When the number is ending with 2,
+// Then the function should return a string by appending "nd" to the number.
+test("should append 'st' for numbers ending with 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(152)).toEqual("152nd");
+  expect(getOrdinalNumber(-82)).toEqual("-82nd");
+});
+
+// Case 4: Numbers ending with 3
+// When the number is ending with 3,
+// Then the function should return a string by appending "rd" to the number.
+test("should append 'st' for numbers ending with 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(183)).toEqual("183rd");
+  expect(getOrdinalNumber(-903)).toEqual("-903rd");
+});
+
+// Case 5: Numbers not ending 1, 2 and 3 except 11
+// When the number is not ending with 1, 2 and 3 except 11,
+// Then the function should return a string by appending "th" to the number.
+test("should append 'th' for numbers not ending with 1, 2 and 3 except those ending with 11", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(0)).toEqual("0th");
+  expect(getOrdinalNumber(125)).toEqual("125th");
+  expect(getOrdinalNumber(1000)).toEqual("1000th");
+  expect(getOrdinalNumber(87939)).toEqual("87939th");
+  expect(getOrdinalNumber(-780987)).toEqual("-780987th");
 });

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

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

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

@@ -20,13 +20,32 @@ 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 original string as the count is 1", () => {
+  const str = "OneWord";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("OneWord");
+});
 
 // 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 return an empty string as the count is 0", () => {
+  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 a negative number", () => {
+  const str = "hello";
+  const count = -2;
+  expect(() => {
+    repeatStr(str, count);
+  }).toThrow("Count can't be negative");
+});