London | 26-ITP-May | Hugh Mills | Sprint 3 | 2. practice tdd

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

@@ -1,5 +1,13 @@
+// function countChar(stringOfCharacters, findCharacter) {
+//   return 5
+// }
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let countChar = 0;
+  for (let stringNum = 0; stringNum < stringOfCharacters.length; stringNum++) {
+    if (findCharacter === stringOfCharacters[stringNum]){
+      countChar++;
+    }
+  }
+  return countChar;
 }
-
 module.exports = countChar;

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

@@ -17,8 +17,29 @@ test("should count multiple occurrences of a character", () => {
   expect(count).toEqual(5);
 });
 
+test("should count multiple occurrences of a character with spaces", () => {
+  const str = "eee  ee e e";
+  const char = "e";
+  const count = countChar(str, char);
+  expect(count).toEqual7;
+});
+
+test("should count multiple occurrences of a character with random characters", () => {
+  const str = "ajhyabhaa kaak";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(6);
+})
+
 // 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("should return 0 with no occurrence of the character", () => {
+  const str ="abcd";
+  const char = "e";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+

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

@@ -1,5 +1,14 @@
+// function getOrdinalNumber(num) {
+//   return "1st";
+// }
+
 function getOrdinalNumber(num) {
-  return "1st";
+  let text = num.toString();
+  if (text === "11") {
+    return (text + "th");
+  } 
+  return (text + "st");
 }
 
+// getOrdinalNumber(1)).toEqual("1st")
 module.exports = getOrdinalNumber;

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

@@ -18,3 +18,8 @@ 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 'th' for number 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+
+});

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

@@ -1,7 +1,17 @@
-function repeatStr() {
+function repeatStr(str, count) {
+  let result = "";
+  if (count < 0) {
+    throw new Error("cannot be negative number")
+  }
+
+  for (let i=0; i < count; i++) {
+    result = result + str
+  }
   // 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";
-}
+  return result;
+
+};
 
 module.exports = repeatStr;
+

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

@@ -20,13 +20,33 @@ 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 the string as the str for counting 1 time", () => {
+  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 empty string when count is 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 error when count is negative", ()=> {
+  const str="hello";
+  const count =-6;
+  expect(() => repeatStr(str, count)).toThrow("cannot be negative number");
+
+});