London | 25-ITP-September | Alexandru Pocovnicu | Coursework/sprint 3 | 2 practice tdd

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

@@ -1,5 +1,18 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let char = 0;
+  if (stringOfCharacters === 0){
+    return 0
+  }
+  for(let i = 0;i <= stringOfCharacters.length - findCharacter.length;i++){ 
+    if ( findCharacter.length === 0 || stringOfCharacters === 0){
+      return 0;
+    }
+    if(stringOfCharacters.substring(i, i + findCharacter.length ) === findCharacter){
+      char++;
+    }
+  }
+  return char
 }
 
 module.exports = countChar;
+

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

@@ -22,3 +22,44 @@ 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 the character doesn't appear in the string", () => {
+  const str = "aaaaa";
+  const char = "s";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 0 if the character is empty", () => {
+  const str = "aaaaa";
+  const char = "";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 0 if the character doesn't appear in the string", () => {
+  const str = "aaca";
+  const char = "ab";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 0 if the character doesn't appear in the string", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 1 when substring appears once in the string", () => {
+  const str = "aaca";
+  const char = "ac";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+test("should return 0 if the character doesn't appear in the string", () => {
+  const str = "a";
+  const char = "aa";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,30 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  if (typeof num !== "number") {
+    return NaN;
+  }
+  if (!Number.isInteger(num)) {
+    return "not an integer number";
+  }
+  if (num === 0) {
+    return "invalid number";
+  }
+
+  const lastDigit = Number(num.toString().slice(-1));
+  const lastTwoDigits = Number(num.toString().slice(-2));
+
+  if (lastTwoDigits >= 10 && lastTwoDigits <= 13) {
+    return `${num}th`;
+  }
+
+  if (lastDigit === 1) {
+    return `${num}st`;
+  } else if (lastDigit === 2) {
+    return `${num}nd`;
+  } else if (lastDigit === 3) {
+    return `${num}rd`;
+  }
+
+  return `${num}th`;
 }
 
 module.exports = getOrdinalNumber;

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

@@ -8,6 +8,63 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number is 1,
 // Then the function should return "1st"
 
+test("should return 'not an integer number' for 1.5", () => {
+  expect(getOrdinalNumber(1.5)).toEqual("not an integer number");
+}); 
+
+test("should return 'invalid number' for 0", () => {
+  expect(getOrdinalNumber(0)).toEqual("invalid number");
+});
+
 test("should return '1st' for 1", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
 });
+
+test("should return '121st' for 121", () =>{
+  expect(getOrdinalNumber(121)).toEqual("121st")
+})
+
+test("should return '2nd' for 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+
+
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+
+test("should return '33rd' for 33", () => {
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+});
+
+test("should return '5th' for 5", () => {
+  expect(getOrdinalNumber(5)).toEqual("5th");
+});
+
+test("should return '1114th' for 1114", () => {
+  expect(getOrdinalNumber(1114)).toEqual("1114th");
+});
+
+test("should return '11th' for 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+
+test("should return '-11th' for -11", () => {
+  expect(getOrdinalNumber(-11)).toEqual("-11th");
+});
+
+test("should return '112th' for 112", () => {
+  expect(getOrdinalNumber(112)).toEqual("112th");
+});
+
+test("should return '11113th' for 11113", () => {
+  expect(getOrdinalNumber(11113)).toEqual("11113th");
+});
+
+test("should return NaN for s", () => {
+  expect(getOrdinalNumber("s")).toEqual(NaN);
+});
+
+test("should return NaN for '9'", () => {
+  expect(getOrdinalNumber("9")).toEqual(NaN);
+});

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

@@ -1,5 +1,14 @@
-function repeat() {
-  return "hellohellohello";
+function repeat(str, count) {
+  if (typeof str !== "string") {
+    return "Error: str must be a string";
+  }
+  if (count < 0 || count === undefined || typeof count !== "number") {
+    return "Error : count must be a positive integer";
+  }
+  if (count === 0) {
+    return "";
+  }
+  return str.repeat(count);
 }
 
 module.exports = repeat;

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

@@ -21,12 +21,117 @@ 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 not repeat the string", ()=>{
+const str = "hello";
+const count = 1;
+const repeatedStr = repeat(str, count);
+expect(repeatedStr).toEqual("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("should return an empty string", ()=>{
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("");
+})
+
+// case: Handle str not a string:
+// Given a number and a count equal to 2,
+// When the repeat function is called with these inputs,
+// Then it should return an error message.
+
+test("should return an error message", ()=>{
+  const str = 5;
+  const count = 5;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("Error: str must be a string");
+})
+
+// case: Handle Count of Undefined:
+// Given a target string str and a count equal to Undefined,
+// When the repeat function is called with these inputs,
+// Then it should return an error message.
+
+test("should return an error message", ()=>{
+  const str = "hello";
+  const count = undefined;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("Error : count must be a positive integer");
+})
+
+// case: Handle Count of array:
+// Given a target string str and a count equal to [],
+// When the repeat function is called with these inputs,
+// Then it should return an error message.
+
+test("should return an error message", ()=>{
+  const str = "hello";
+  const count = [];
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("Error : count must be a positive integer");
+})
+
 // 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 an error message", ()=>{
+  const str="hello";
+  const count=-1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("Error : count must be a positive integer");
+})
+
+// case: Handle empty string:
+// Given a target string str and a count equal to 2,
+// When the repeat function is called with these inputs,
+// Then it should return an empty string, ensuring that a count of 2 results in an empty output.
+
+test("should return an empty string", () => {
+  const str = "";
+  const count = 2;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("");
+});
+
+// case: Handle string with space:
+// Given a target string str and a count equal to 2,
+// When the repeat function is called with these inputs,
+// Then it should repeat the str count times and return a new string containing the repeated str values.
+
+test("should repeat the string count times", () => {
+  const str = "a b";
+  const count = 2;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("a ba b");
+});
+
+// case: Handle long string :
+// Given a target string str and a count equal to 1,
+// When the repeat function is called with these inputs,
+// Then it should repeat the str count times and return a new string containing the repeated str values.
+
+test("should not repeat the string", () => {
+  const str = "xvg56756yrhfghe5ujdfh45657tjrtg6yrthrty";
+  const count = 1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("xvg56756yrhfghe5ujdfh45657tjrtg6yrthrty");
+});
+
+// case: Handle single character string and high count :
+// Given a target string str and a count equal to 18,
+// When the repeat function is called with these inputs,
+// Then it should repeat the str count times and return a new string containing the repeated str values.
+
+test("should repeat str 18 times", () => {
+  const str = "x";
+  const count = 18;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("xxxxxxxxxxxxxxxxxx");
+});