Complete practice-tdd assignments cleanly from main

Author: asandagwala

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

@@ -17,7 +17,14 @@ test("should count multiple occurrences of a character", () => {
   expect(count).toEqual(5);
 });
 
-// Scenario: No Occurrences
+//Scenario: No Occurrences
+test("should return 0 when the character does not exist in the string", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
 // Given the input string `str`,
 // And a character `char` that does not exist within `str`.
 // When the function is called with these inputs,

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

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

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

@@ -18,3 +18,12 @@ 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("converts 1 to an ordinal number",  () => {
+  expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+test("converts numbers to ordinal number",  () => {
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});

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

@@ -1,7 +1,13 @@
-function repeatStr() {
+function repeatStr(str, count) {
+  let result = "";
+  for (let i =0; i<count;i++){
+    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;
 }
+console.log(repeatStr("hello",3))
 
 module.exports = repeatStr;

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

@@ -20,13 +20,35 @@ 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.
+// Case: handle count of 1:
+test("should return the original string unchanged when count is 1", () => {
+  const str = "apple";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("apple");
+});
+
 
 // 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 count is 0", () => {
+  const str = "world";
+  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 a negative integer", () => {
+  const str = "test";
+  const count = -5;
+  expect(() => repeatStr(str, count)).toThrow();
+});
+

Sprint-3/4-stretch/find.js

@@ -20,6 +20,20 @@ console.log(find("code your future", "z"));
 // Pay particular attention to the following:
 
 // a) How the index variable updates during the call to find
+// It always starts at 0, the first letter of the string. On each loop 
+// iteration that doesn't find a match, index++ runs, increasing its value by 1
+
 // b) What is the if statement used to check
+// If it evaluates to true, it stops the 
+// entire function immediately and hands back that position number.
+
 // c) Why is index++ being used?
+// It forces the loop to move to the next letter in the string for the next round. 
+// Without it, the loop would look at index 0 over and over again and increasing 
+// the index in every single turn makes sure that the loop with eventually 
+// be equal to the length of the string and come to an end.
+
 // d) What is the condition index < str.length used for?
+// This condition is a safety guardrail that defines the lifetime of the loop. 
+// It basically tells the loop to  keep looping as long as 
+// we haven't run out of letters to look at

Sprint-3/4-stretch/password-validator.js

@@ -1,6 +1,38 @@
-function passwordValidator(password) {
-    return password.length < 5 ? false : true
-}
+function passwordValidator(password, passwordsHistory) {
+  if (password.length < 5) {
+    return false;
+  }
+  if (passwordsHistory && passwordsHistory.includes(password)) {
+    return false;
+  }
+  let hasUppercase = false;
+  let hasLowercase = false;
+  let hasNumber = false;
+  let hasSymbol = false;
+
+  const specialSymbols = "!#$%*&.";
+  for (let i = 0; i < password.length; i++) {
+    const char = password[i];
+
+    if (char >= "0" && char <= "9") {
+      hasNumber = true;
+    } else if (specialSymbols.includes(char)) {
 
+      hasSymbol = true;
+    } else if (char === char.toUpperCase() && char !== char.toLowerCase()) {
+      hasUppercase = true;
+      
+    } else if (char === char.toLowerCase() && char !== char.toUpperCase()) {
+      hasLowercase = true;
+    }
+  }
+
+  if (hasUppercase && hasLowercase && hasNumber && hasSymbol) {
+    return true;
+  } else {
+    return false;
+  }
+}
+console.log(passwordValidator("Aodbe.f2", "Aodbe.f2"));
 
 module.exports = passwordValidator;