Glasgow | 25-ITP-May | Arthur Chan | Sprint 3 | practice-tdd

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

@@ -1,5 +1,11 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+  for (let letter of stringOfCharacters) {
+    if (letter === findCharacter) {
+      count = count + 1;
+    }
+  }
+  return count;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,10 @@ test("should count multiple occurrences of a character", () => {
 // 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("No Occurrences", () => {
+  const str = "aaaaa";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,20 @@
 function getOrdinalNumber(num) {
-  return "1st";
+
+   if(num%100===11 || num%100===12 || num%100===13){
+  return num + "th";
+ }
+   if(num%10===1){
+  return num + "st";
+ }
+
+   if(num%10===2){
+  return num +"nd";
+ }
+
+  if(num%10===3){
+  return num +"rd";
+ }
 }
 
 module.exports = getOrdinalNumber;
+

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

@@ -18,3 +18,21 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+test("should append 'nd' for numbers ending with 2 ", () => {
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(222)).toEqual("222nd");
+});
+
+test("should append 'rd' for numbers ending with 3 ", () => {
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(223)).toEqual("223rd");
+});
+
+test(" ending in 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(1111)).toEqual("1111th");
+});

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

@@ -1,7 +1,20 @@
-function repeatStr() {
+function repeatStr(str, count) {
   // 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";
+
+  if (count < 0) {
+    throw new Error("Oh no! Negative numbers are not allowed!");
+
+  }
+
+  let repeatedStr = "";
+
+  for (i = 0; i < count; i++) {
+    repeatedStr = repeatedStr + str;
+  }
+  return repeatedStr;
 }
 
 module.exports = repeatStr;
+
+//for committing//

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

@@ -4,6 +4,13 @@ const repeatStr = require("./repeat-str");
 // When the repeatStr function is called with these inputs,
 // Then it should:
 
+test("Given a target string 'str' and a positive integer 'count'", () => {
+  const str = "hello";
+  const count = 3;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("hellohellohello");
+});
+
 // Case: handle multiple repetitions:
 // Given a target string `str` and a positive integer `count` greater than 1,
 // When the repeatStr function is called with these inputs,
@@ -21,12 +28,35 @@ test("should repeat the string count times", () => {
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
 
+test("Given a target string `str` and a `count` equal to 1", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
+
 // 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("Given a target string `str` and a `count` equal to 1", () => {
+  const str = "";
+  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(" Given a target string `str` and a negative integer `count` ", () => {
+  const str = "idea";
+  const count = -3;
+
+  expect(() => repeatStr("idea", -3)).toThrow(
+    "Oh no! Negative numbers are not allowed!"
+  );
+});