London | 25-ITP-SEP | Mariia Serhiienko| Sprint 3 | Coursework/sprint 3 practice tdd

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

@@ -1,5 +1,9 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  const arrToStr = stringOfCharacters.split("");
+
+  const countCharInArr = arrToStr.filter((char) => char === findCharacter);
+
+  return countCharInArr.length;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,9 @@ 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 if there's no occurrences  of the char were found in the case-sensitive str", () => {
+  const str = "aaaaABcGRja";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,16 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const lastDigit = num % 10;
+  const lastTwoDigits = num % 100;
+
+  if (lastTwoDigits >= 11 && lastTwoDigits <= 13) {
+    return num + "th";
+  }
+
+  if (lastDigit === 1) return num + "st";
+  if (lastDigit === 2) return num + "nd";
+  if (lastDigit === 3) return num + "rd";
+
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -11,3 +11,39 @@ const getOrdinalNumber = require("./get-ordinal-number");
 test("should return '1st' for 1", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
 });
+
+// Case 2: Identify the ordinal number for 2
+// When the number is 2,
+// Then the function should return "2nd"
+
+test("should return '2nd' for 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+
+// Case 3: Identify the ordinal number for 3
+// When the number is 3,
+// Then the function should return "3rd"
+
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+
+// Case 4: Identify the ordinal number for other numbers
+// If the last digit of number is not 1, 2, 3
+// and the last two digits are not between 11 and 13
+// Then the function should return the number with "th" suffix
+// otherwise, return the number with the appropriate suffix
+
+test("should return '44th' for 44; '131st' for 131 etc.", () => {
+  expect(getOrdinalNumber(44)).toEqual("44th");
+  expect(getOrdinalNumber(9)).toEqual("9th");
+  expect(getOrdinalNumber(20)).toEqual("20th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+  expect(getOrdinalNumber(131)).toEqual("131st");
+  expect(getOrdinalNumber(222)).toEqual("222nd");
+  expect(getOrdinalNumber(323)).toEqual("323rd");
+  expect(getOrdinalNumber(4046486655)).toEqual("4046486655th");
+});

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

@@ -1,5 +1,20 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count === 0) {
+    return "";
+  }
+  if (count < 0) {
+    return "Error! Negative counts are not valid!";
+  }
+
+  let repeatedStrCountTimes = "";
+
+  let i = 0;
+  while (i < count) {
+    repeatedStrCountTimes += str;
+    i++;
+  }
+
+  return repeatedStrCountTimes;
 }
 
 module.exports = repeatStr;

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

@@ -20,13 +20,31 @@ 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, ensuring that a count of 1 results in no repetition.
+test("should return the original string without repetition if count equal to 1", () => {
+  const str = "Alone";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("Alone");
+});
 
 // 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, ensuring that a count of 0 results in an empty output.
+test("should return an empty string if count equal to 0", () => {
+  const str = "nonsense";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 
 // case: 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 or return an appropriate error message, as negative counts are not valid.
+test("should return an appropriate error message if count equal to a negative integer", () => {
+  const str = "negative";
+  const count = -5;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("Error! Negative counts are not valid!");
+});