London | 26-ITP-May | Vito Moratti | 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 char of stringOfCharacters) {
+        if (char === findCharacter) {
+            count ++;
+        }
+    }
+    return count
+} 
 
-module.exports = countChar;
+module.exports = countChar;

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

@@ -22,3 +22,9 @@ 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 detect no instances of a given character", () => {
+  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 +1,32 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  if (num % 100 === 11) {
+      return `${num}th`;
+  } else if (num % 100 === 12) {
+      return `${num}th`;
+  } else if (num % 100 === 13) {
+      return `${num}th`;
+  } else if (num % 10 === 1) {
+      return `${num}st`;
+  } else if (num % 10 === 2) {
+      return `${num}nd`
+  } else if (num % 10 === 3) {
+      return `${num}rd`
+  } else {
+      return `${num}th`
+  }
 }
 
 module.exports = getOrdinalNumber;
+
+console.log(getOrdinalNumber(1));
+console.log(getOrdinalNumber(2));
+console.log(getOrdinalNumber(3));
+console.log(getOrdinalNumber(4));
+console.log(getOrdinalNumber(11));
+console.log(getOrdinalNumber(12));
+console.log(getOrdinalNumber(13));
+console.log(getOrdinalNumber(21));
+console.log(getOrdinalNumber(52));
+console.log(getOrdinalNumber(63));
+console.log(getOrdinalNumber(111))
+

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 2, except those ending with 12,
+// Then the function should return a string by appending "nd" to the number.
+test(`should return 'nd' for numbers ending with 2`, () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(122)).toEqual("122nd");
+});
+
+//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 "rd" to the number.
+test(`should add 'rd' for numbers ending with 3`, () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(123)).toEqual("123rd");
+});
+
+//Case 4: Numbers ending with 11, 12, 13.
+// When the number ends with 11, 12 and 13,
+// Then the function should return a string by appending "th" to the number.
+test(`should add 'th' to exceptions like 11, 12 and 13`, () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});
+
+//Case 5: All other numbers that are not ending with 1, 2, 3, and that are not 11, 12, and 13.
+// the function should return corresponding string with "th" at the end
+test(`should add 'th' to every case that is not exceptional`, () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(555)).toEqual("555th");
+  expect(getOrdinalNumber(6666)).toEqual("6666th");
+});

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

@@ -1,7 +1,20 @@
-function repeatStr() {
-  // 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";
+function repeatStr(str, num) {
+  var result = "";
+  var i;
+  if (num < 0) {
+    throw new Error("negative numbers are not valid");
+  } else if (num === 0) {
+    result = "";
+  } else {
+    for (i = 0; i < num; i++) {
+      result += str;
+    }
+  }
+  return result;
 }
 
-module.exports = repeatStr;
+//console.log(repeatStr("hello", -1));
+//console.log(repeatStr("hello", 0));
+//console.log(repeatStr("hello", 5))
+
+module.exports = repeatStr;

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

@@ -20,13 +20,31 @@ test("should repeat the string count times", () => {
 // 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 just original 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.
+test("should return an empty string for count of 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 negative number is entered", () => {
+  const str = "hello";
+  const count = -1;
+
+  expect(() => repeatStr(str, count)).toThrow("negative numbers are not valid");
+});