Manchester | 26-ITP-JAN | Abdu Mussa | Sprint 3 | 2-practice-tdd-complete

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

@@ -1,5 +1,11 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] === findCharacter) {
+      count++;
+    }
+  }
+  return count;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,20 @@ 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("returns 0 when the character does not exist in the string", () => {
+  const str = "The character have no match";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+// Scenario: 1 Occurrences
+// Given the input string `str`,
+// And a character `char` that have 1 character exist in `str`.
+// When the function is called with these inputs,
+// Then it should return 1, indicating that 1 occurrences of `char` were found.
+test("returns 1 when the character appears once in the string", () => {
+  const str = "code your future";
+  const char = "f";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});

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

@@ -1,5 +1,21 @@
-function getOrdinalNumber(num) {
-  return "1st";
+function getOrdinalNumber(number) {
+  const lastTwoDigits = number % 100;
+  if (lastTwoDigits === 11 || lastTwoDigits === 12 || lastTwoDigits === 13) {
+    return number + "th";
+  }
+  const lastDigit = number % 10;
+  let suffix;
+  if (lastDigit === 1) {
+    suffix = "st";
+  } else if (lastDigit === 2) {
+    suffix = "nd";
+  } else if (lastDigit === 3) {
+    suffix = "rd";
+  } else {
+    suffix = "th";
+  }
+
+  return number + suffix;
 }
 
 module.exports = getOrdinalNumber;

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

@@ -18,3 +18,38 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+// Case 2: Numbers ending with 2 (but not 12)
+// When the number ends with 1, except those ending with 12,
+// Then the function should return a string by appending "st" to the number.
+test("should append 'nd' for numbers ending with 2, except those ending with 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(42)).toEqual("42nd");
+  expect(getOrdinalNumber(1752)).toEqual("1752nd");
+});
+// Case 3: Numbers ending with 3 (but not 13)
+// When the number ends with 3, except those ending with 13,
+// Then the function should return a string by appending "st" to the number.
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(83)).toEqual("83rd");
+  expect(getOrdinalNumber(653)).toEqual("653rd");
+});
+// Case 4: Numbers ending with 4 through 9
+// When the number does not end with 1, 2 or 3,
+// Then the function should return a string by appending "th" to the number.
+test("should append 'th' for all other numbers that do not end with 1, 2 or 3", () => {
+  expect(getOrdinalNumber(5)).toEqual("5th");
+  expect(getOrdinalNumber(38)).toEqual("38th");
+  expect(getOrdinalNumber(15678)).toEqual("15678th");
+});
+//Case 5: Numbers ending with 11, 12 and 13 (special exceptions)
+// When the number ends with 11, 12 or 13,
+// Then the function should return a string by appending "th" to the number.
+test("should append 'th' for numbers ending with 11, 12 and 13", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+});

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

@@ -1,5 +1,10 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(word, times) {
+  if (times < 0) {
+    throw new Error("negative number is not allowed");
+  } else if (times === 0) {
+    return "";
+  } else {
+    return word.repeat(times);
+  }
 }
-
 module.exports = repeatStr;

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

@@ -9,24 +9,41 @@ const repeatStr = require("./repeat-str");
 // When the repeatStr function is called with these inputs,
 // Then it should return a string that contains the original `str` repeated `count` times.
 
-test("should repeat the string count times", () => {
-  const str = "hello";
-  const count = 3;
-  const repeatedStr = repeatStr(str, count);
+test("should return the string the given number of count when count is a positive number", () => {
+  let word = "hello";
+  let times = 3;
+  const repeatedStr = repeatStr(word, times);
   expect(repeatedStr).toEqual("hellohellohello");
 });
 
 // Case: handle count of 1:
 // 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 return the original string without repetition when count is 1", () => {
+  let word = "code your future";
+  let times = 1;
+  const repeatedStr = repeatStr(word, times);
+  expect(repeatedStr).toEqual("code your future");
+});
 // 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 when the number of times is 0", () => {
+  let word = "hello";
+  let times = 0;
+  const repeatedStr = repeatStr(word, times);
+  expect(repeatedStr).toBe("");
+});
 // 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 throw an error when a negative number is passed", () => {
+  let word = "hello";
+  let times = -1;
+  expect(() => {
+    repeatStr("hello", -1);
+  }).toThrow("negative number is not allowed");
+});