London | 26-ITP-May | Damilola Odumosu| Sprint 3 | Practice TDD

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

@@ -1,5 +1,15 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
-}
+  if(stringOfCharacters === "" || findCharacter === ""){
+    throw new Error("string an char are not given")
+  }
 
+  const str = stringOfCharacters.split("")
+  let count = 0;
+  for(const char of str){
+    if(char === findCharacter){
+      count++
+    }
+  }
+    return count
+}
 module.exports = countChar;

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

@@ -19,6 +19,14 @@ test("should count multiple occurrences of a character", () => {
 
 // Scenario: 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 when no occurrence of the char", () => {
+  const str = "aeiou";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+})

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

@@ -1,5 +1,31 @@
 function getOrdinalNumber(num) {
-  return "1st";
+    const numberStr1 = String(num).slice(-1)
+    const numberStr2 = String(num).slice(-2)
+
+    let number1 = Number(numberStr1)
+    let number2 = Number(numberStr2)
+
+    if (number2 === 11 || number2 === 12 || number2 === 13) {
+        return `${num}th`
+    }
+    else {
+
+        switch (number1) {
+            case 1:
+                return`${num}st`
+                break;
+            case 2:
+                return `${num}nd`
+                break;
+            case 3:
+                return `${num}rd`
+                break;
+            default:
+                return`${num}th`;
+        }
+    }
+
 }
 
+
 module.exports = getOrdinalNumber;

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

@@ -14,7 +14,35 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number ends with 1, except those ending with 11,
 // Then the function should return a string by appending "st" to the number.
 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(1)).toEqual("1st");
+    expect(getOrdinalNumber(21)).toEqual("21st");
+    expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+test("should append 'nd' for numbers ending with 2", () => {
+expect(getOrdinalNumber(2)).toEqual("2nd");
+expect(getOrdinalNumber(22)).toEqual("22nd");
+expect(getOrdinalNumber(32)).toEqual("32nd");
+
+});
+
+test("should append 'rd' for numbers ending with 3", () => {
+expect(getOrdinalNumber(3)).toEqual("3rd");
+expect(getOrdinalNumber(333)).toEqual("333rd");
+expect(getOrdinalNumber(303)).toEqual("303rd");
+
+});
+
+test("should append 'th' to numbers ending in 0, 4, 5, 6, 7, 8, 9, and to 11, 12, and 13", () => {
+expect(getOrdinalNumber(0)).toEqual("0th");
+expect(getOrdinalNumber(44)).toEqual("44th");
+expect(getOrdinalNumber(65)).toEqual("65th");
+expect(getOrdinalNumber(46)).toEqual("46th");
+expect(getOrdinalNumber(77)).toEqual("77th");
+expect(getOrdinalNumber(98)).toEqual("98th");
+expect(getOrdinalNumber(99)).toEqual("99th");
+expect(getOrdinalNumber(11)).toEqual("11th");
+expect(getOrdinalNumber(12)).toEqual("12th");
+expect(getOrdinalNumber(13)).toEqual("13th");
+})
+;

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

@@ -1,7 +1,24 @@
-function repeatStr() {
-  // Your implementation of this function must *not* call String.prototype.repeat (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat).
-  // The goal is to re-implement that function, not to use it.
-  return "hellohellohello";
-}
+function repeatStr(word, wordCounter) {
+    // Your implementation of this function must *not* call String.prototype.repeat (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat).
+    // The goal is to re-implement that function, not to use it.
+    let count = 0;
+    let repeatedString = []
 
+    if (wordCounter < 0) { // rejects negative numbers
+        throw new Error("Enter a positive number")
+    }
+    if(wordCounter === 0){
+        return ""
+    }
+    if(wordCounter === 1){
+        return word
+    }
+    if(wordCounter > 1){
+        while(count < wordCounter){
+            count++
+            repeatedString.push(word)
+        }
+    }
+return repeatedString.join("")
+}
 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 string 1 time", () =>{
+  const str = "name";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("name")
+})
 
 // 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", () =>{
+  const str = "name";
+  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.
+// 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("throws on negative number", () => {
+  expect(() => repeatStr("dami",-5)).toThrow("Enter a positive number");
+});