Manchester| 25-ITP-September | Fithi Teklom| Sprint 3 | 2-practice-tdd

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

@@ -1,5 +1,9 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+  for (let char of stringOfCharacters) {
+    if (char === findCharacter) count++;
+  }
+  return count;
 }
 
-module.exports = countChar;
+module.exports = countChar;

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

@@ -1,5 +1,5 @@
 // implement a function countChar that counts the number of times a character occurs in a string
-const countChar = require("./count");
+
 // Given a string str and a single character char to search for,
 // When the countChar function is called with these inputs,
 // Then it should:
@@ -9,13 +9,46 @@ const countChar = require("./count");
 // And a character char that may occur multiple times with overlaps within str (e.g., 'a' in 'aaaaa'),
 // When the function is called with these inputs,
 // Then it should correctly count overlapping occurrences of char (e.g., 'a' appears five times in 'aaaaa').
+
+const countChar = require('./count');
+
 
 test("should count multiple occurrences of a character", () => {
   const str = "aaaaa";
   const char = "a";
   const count = countChar(str, char);
   expect(count).toEqual(5);
 });
+test("should return 0 when the character is not found", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario: Case Sensitivity
+// It should be case-sensitive, meaning 'A' != 'a'.
+test("should be case-sensitive when counting characters", () => {
+  const str = "Banana";
+  expect(countChar(str, "a")).toEqual(3);
+  expect(countChar(str, "A")).toEqual(0);
+});
+
+// Scenario: Empty String
+// It should return 0 when the input string is empty.
+test("should return 0 when the input string is empty", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario: Special Characters
+// It should correctly count spaces and punctuation.
+test("should count special characters like spaces or punctuation", () => {
+  expect(countChar("a b a b", " ")).toEqual(3);
+  expect(countChar("wow!!!", "!")).toEqual(3);
+});
 
 // Scenario: No Occurrences
 // Given the input string str,

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

@@ -1,5 +1,24 @@
+
 function getOrdinalNumber(num) {
-  return "1st";
+  const remainder10 = num % 10;
+  const remainder100 = num % 100;
+
+  if (remainder100 >= 11 && remainder100 <= 13) {
+    return `${num}th`;
+  }
+
+  switch (remainder10) {
+    case 1:
+      return `${num}st`;
+    case 2:
+      return `${num}nd`;
+    case 3:
+      return `${num}rd`;
+    default:
+      return `${num}th`;
+  }
 }
 
 module.exports = getOrdinalNumber;
+
+

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

@@ -1,4 +1,8 @@
 const getOrdinalNumber = require("./get-ordinal-number");
+
+
+module.exports = getOrdinalNumber;
+
 // In this week's prep, we started implementing getOrdinalNumber
 
 // continue testing and implementing getOrdinalNumber for additional cases
@@ -8,6 +12,39 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number is 1,
 // Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
-  expect(getOrdinalNumber(1)).toEqual("1st");
+
+describe("getOrdinalNumber()", () => {
+  test("should return '1st' for 1", () => {
+    expect(getOrdinalNumber(1)).toBe("1st");
+  });
+
+  test("should return '2nd' for 2", () => {
+    expect(getOrdinalNumber(2)).toBe("2nd");
+  });
+
+  test("should return '3rd' for 3", () => {
+    expect(getOrdinalNumber(3)).toBe("3rd");
+  });
+
+  test("should return '4th' for 4", () => {
+    expect(getOrdinalNumber(4)).toBe("4th");
+  });
+
+  test("should return '11th', '12th', '13th' for special cases", () => {
+    expect(getOrdinalNumber(11)).toBe("11th");
+    expect(getOrdinalNumber(12)).toBe("12th");
+    expect(getOrdinalNumber(13)).toBe("13th");
+  });
+
+  test("should return correct suffixes for 21, 22, 23", () => {
+    expect(getOrdinalNumber(21)).toBe("21st");
+    expect(getOrdinalNumber(22)).toBe("22nd");
+    expect(getOrdinalNumber(23)).toBe("23rd");
+  });
+
+  test("should return '111th' for numbers ending with 11, 12, 13 even if larger", () => {
+    expect(getOrdinalNumber(111)).toBe("111th");
+    expect(getOrdinalNumber(112)).toBe("112th");
+    expect(getOrdinalNumber(113)).toBe("113th");
+  });
 });

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

@@ -1,5 +1,9 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+
+    if (count < 0) {
+      throw new Error("Count must be a non-negative integer");
+    }
+    return str.repeat(count);
 }
 
 module.exports = repeatStr;

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

@@ -1,32 +1,20 @@
-// Implement a function repeatStr
-const repeatStr = require("./repeat-str");
-// Given a target string str and a positive integer count,
-// When the repeatStr function is called with these inputs,
-// Then it should:
 
-// case: repeat String:
-// Given a target string str and a positive integer count,
-// When the repeatStr function is called with these inputs,
-// Then it should repeat the str count times and return a new string containing the repeated str values.
+
+const repeatStr = require("./repeat-str");
 
 test("should repeat the string count times", () => {
-  const str = "hello";
-  const count = 3;
-  const repeatedStr = repeatStr(str, count);
-  expect(repeatedStr).toEqual("hellohellohello");
+  expect(repeatStr("hello", 3)).toBe("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, ensuring that a count of 1 results in no repetition.
+test("should return the original string when count is 1", () => {
+  expect(repeatStr("world", 1)).toBe("world");
+});
 
-// 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, ensuring that a count of 0 results in an empty output.
+test("should return an empty string when count is 0", () => {
+  expect(repeatStr("test", 0)).toBe("");
+});
+
+test("should throw an error when count is negative", () => {
+  expect(() => repeatStr("oops", -2)).toThrow("Count must be a non-negative integer");
+});
 
-// case: 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 or return an appropriate error message, as negative counts are not valid.