Complete 2-practice-tdd

Author: libanj0161

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

@@ -1,5 +1,22 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  // trying to find the amount of times the findCharacter is found in the stringOfCharacters
+  const lengthOfString = stringOfCharacters.length;
+  console.log("lengthOfString", lengthOfString);
+
+  // replace all instances of findCharacter in string of characters with an empty string, and then get the length. (e.g. in house replace the e with an empty string " ").
+  const otherLettersLength = stringOfCharacters.replaceAll(
+    findCharacter,
+    ""
+  ).length;
+
+  // declaring the variable called result and subtract otherLettersLength from the lengthOfString to find the number of occurences of findCharacter.
+  const result = lengthOfString - otherLettersLength;
+  console.log("result", result);
+  return result;
 }
 
 module.exports = countChar;
+
+// function countOccurrences(str, char) {
+//   return str.length - str.replaceAll(char, "").length;
+// }

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

@@ -17,10 +17,30 @@ test("should count multiple occurrences of a character", () => {
   expect(count).toEqual(5);
 });
 
+test("should count multiple occurrences of a character", () => {
+  const str = "house";
+  const char = "e";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+test("should count multiple occurrences of a character", () => {
+  const str = "playful";
+  const char = "l";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});
+
 // 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(``);
+test("should return when there are no occurrences of a character", () => {
+  const str = "spaceship";
+  const char = "x";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,18 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const lastdigit = num % 10;
+  if (lastdigit === 1) {
+    return `${num}st`;
+  }
+
+  if (lastdigit === 2) {
+    return `${num}nd`;
+  }
+
+  if (lastdigit === 3) {
+    return `${num}rd`;
+  } else {
+    return `${num}th`;
+  }
 }
 
 module.exports = getOrdinalNumber;

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

@@ -18,3 +18,15 @@ 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(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
+});
+
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(133)).toEqual("133rd");
+});

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

@@ -1,5 +1,8 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("invalid count");
+  }
+  return str.repeat(count);
 }
-
+// call the repeat function on the string and pass in count.
 module.exports = repeatStr;

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

@@ -21,12 +21,33 @@ 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("should repeat the string count times", () => {
+  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("should repeat the string count times", () => {
+  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 repeat the string count times", () => {
+  const str = "hello";
+  const count = -2;
+  // const repeatedStr = repeatStr(str, count);
+  expect(() => repeatStr(str, count)).toThrow("invalid count");
+});