Sheffield | ITP-Jan-26 | Hayriye Saricicek | Sprint 3 | practice tdd

.gitignore

@@ -1,4 +1,4 @@
 node_modules
 .DS_Store
-.vscode
-**/.DS_Store
+.vscode/
+**/.DS_Store

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

@@ -1,5 +1,12 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+  for (let char of stringOfCharacters) {
+    if (char === findCharacter) {
+      count++;
+    }
+  }
+
+  return count;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,15 @@ 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("should count multiple occurrences of a character", () => {
+  expect(countChar("aaaaa", "a")).toEqual(5);
+  expect(countChar("blind", "a")).toEqual(0);
+  expect(countChar("blood", "o")).toEqual(2);
+  expect(countChar("bbbrf", "b")).toEqual(3);
+  expect(countChar("ooooa", "o")).toEqual(4);
+});
+
+// handling invalid input
+// the tests work assuming that only letters are in the string
+// numbers and special characters are not tested for

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

@@ -1,5 +1,20 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  // Check if input is a number
+  if (!Number.isInteger(num) || !Number.isFinite(num) || num <= 0) {
+    throw new Error("Input must be a valid number");
+  }
+
+  const lastNum = num % 10; // checks what last number is
+  const last2Num = num % 100; // checks what last two numbers are, needed to check for 11
+
+  if (last2Num >= 11 && last2Num <= 13) {
+    return num + "th";
+  }
+  if (lastNum === 1) return num + "st";
+  if (lastNum === 2) return num + "nd";
+  if (lastNum === 3) return num + "rd";
+
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -13,8 +13,39 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Case 1: Numbers ending with 1 (but not 11)
 // 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", () => {
+
+test("should append 'st' for numbers ending with 1, except 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// Case 2: Numbers ending with 2
+// When the number ends with 2,
+// Then the function should return a string by appending "nd" to the number.
+
+test("should append 'nd' for numbers ending with 2 except 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(32)).toEqual("32nd");
+  expect(getOrdinalNumber(252)).toEqual("252nd");
+});
+
+// Case 3: Numbers ending with 3
+// When the number ends with 3,
+// Then the function should return a string by appending "rd" to the number.
+
+test("should append 'rd' for numbers ending with 3 except 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(133)).toEqual("133rd");
+});
+
+// Case 4: The remaining numbers
+// For numbers ending in 0, 4, 5, 6, 7, 8, 9, 11, 12, 13
+// the function should return a string by appending "th" to the number.
+
+test("should append 'th' if number is ending in 0, 4, 5,6, 7, 8, 9, 10, 11, 12 or 13", () => {
+  expect(getOrdinalNumber(20)).toEqual("20th");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(99)).toEqual("99th");
+});

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

@@ -1,5 +1,13 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("Count must be positive");
+  }
+
+  if (count === 0) {
+    return " ";
+  }
+
+  return str.repeat(count);
 }
 
 module.exports = repeatStr;

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

@@ -5,28 +5,47 @@ const repeatStr = require("./repeat-str");
 // Then it should:
 
 // 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,
-// Then it should return a string that contains the original `str` repeated `count` times.
+// A string is repeated count number of times
+// If a string is "hello" and count is 3 then
+// the hello will be output 3 times with no spaces between
 
-test("should repeat the string count times", () => {
+test("when count equals 3 it should repeat the string 3 times without spaces", () => {
   const str = "hello";
   const count = 3;
   const repeatedStr = repeatStr(str, count);
   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.
+// If count is 1 then the string is not repeated and
+// will be output for example if the string is "Hello"
+// then the output will be "Hello"
+
+test("when count equals 1 it produce the string", () => {
+  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.
+// If the the string is empty then count will be 0
+// and an empty string will be returned
+
+test("should return an empty string when count = 0 ", () => {
+  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 throw an error when count is negative", () => {
+  const str = "hello";
+  const count = -3;
+  expect(() => repeatStr(str, count)).toThrow("Count must be positive");
+});