Sheffield | 26-Jan-ITP | Daniel Aderibigbe | Sprint 3 | Practice tdd

Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js

@@ -15,7 +15,27 @@
 // execute the code to ensure all tests pass.
 
 function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle > 0 && angle < 90) {
+    return "Acute angle";
+  }
+
+  if (angle === 90) {
+    return "Right angle";
+  }
+
+  if (angle > 90 && angle < 180) {
+    return "Obtuse angle";
+  }
+
+  if (angle === 180) {
+    return "Straight angle";
+  }
+
+  if (angle > 180 && angle < 360) {
+    return "Reflex angle";
+  }
+
+  return "Invalid angle";
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -35,3 +55,22 @@ function assertEquals(actualOutput, targetOutput) {
 // Example: Identify Right Angles
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+
+// Acute
+assertEquals(getAngleType(45), "Acute angle");
+
+// Right
+assertEquals(getAngleType(90), "Right angle");
+
+// Obtuse
+assertEquals(getAngleType(120), "Obtuse angle");
+
+// Straight
+assertEquals(getAngleType(180), "Straight angle");
+
+// Reflex
+assertEquals(getAngleType(270), "Reflex angle");
+
+// Invalid
+assertEquals(getAngleType(0), "Invalid angle");
+assertEquals(getAngleType(360), "Invalid angle");

Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -12,6 +12,11 @@
 
 function isProperFraction(numerator, denominator) {
   // TODO: Implement this function
+  if (denominator === 0) {
+    return false;
+  }
+
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +36,13 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(-1, 2), true);
+assertEquals(isProperFraction(1, -2), true);
+
+// Improper fractions
+assertEquals(isProperFraction(2, 2), false);
+assertEquals(isProperFraction(3, 2), false);
+assertEquals(isProperFraction(-3, 2), false);
+
+// Invalid denominator
+assertEquals(isProperFraction(1, 0), false);

Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js

@@ -22,7 +22,38 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  const suit = card.slice(-1);
+  const rank = card.slice(0, -1);
+
+  const validSuits = ["♠", "♥", "♦", "♣"];
+
+  if (!validSuits.includes(suit)) {
+    throw new Error("Invalid card");
+  }
+
+  if (rank === "A") {
+    return 11;
+  }
+
+  if (rank === "J" || rank === "Q" || rank === "K") {
+    return 10;
+  }
+
+  if (
+    rank === "2" ||
+    rank === "3" ||
+    rank === "4" ||
+    rank === "5" ||
+    rank === "6" ||
+    rank === "7" ||
+    rank === "8" ||
+    rank === "9" ||
+    rank === "10"
+  ) {
+    return Number(rank);
+  }
+
+  throw new Error("Invalid card");
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -38,8 +69,19 @@ function assertEquals(actualOutput, targetOutput) {
 }
 
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
-// Examples:
+
+// Ace
+assertEquals(getCardValue("A♠"), 11);
+
+// Face cards
+assertEquals(getCardValue("J♣"), 10);
+assertEquals(getCardValue("Q♦"), 10);
+assertEquals(getCardValue("K♥"), 10);
+
+// Number cards
+assertEquals(getCardValue("2♥"), 2);
 assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("10♦"), 10);
 
 // Handling invalid cards
 try {
@@ -49,4 +91,17 @@ try {
   console.error("Error was not thrown for invalid card");
 } catch (e) {}
 
-// What other invalid card cases can you think of?
+try {
+  getCardValue("1♠");
+  console.error("Error was not thrown for invalid rank");
+} catch (e) {}
+
+try {
+  getCardValue("A");
+  console.error("Error was not thrown for missing suit");
+} catch (e) {}
+
+try {
+  getCardValue("A★");
+  console.error("Error was not thrown for invalid suit");
+} catch (e) {}

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

@@ -1,5 +1,13 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+
+  for (let letter of stringOfCharacters) {
+    if (letter === findCharacter) {
+      count++;
+    }
+  }
+
+  return count;
 }
 
 module.exports = countChar;

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

@@ -1,5 +1,6 @@
 // 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:
@@ -22,3 +23,17 @@ 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", () => {
+  const str = "aaaaa";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(5);
+});
+
+test("should return 0 when the character does not appear in the string", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,24 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const lastTwoDigits = num % 100;
+  const lastDigit = num % 10;
+
+  if (lastTwoDigits >= 11 && lastTwoDigits <= 13) {
+    return number + "th";
+  }
+
+  if (lastDigit === 1) {
+    return num + "st";
+  }
+
+  if (lastDigit === 2) {
+    return num + "nd";
+  }
+
+  if (lastDigit === 3) {
+    return num + "rd";
+  }
+
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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 cannot be negative");
+  }
+
+  return str.repeat(count);
 }
 
 module.exports = repeatStr;

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

@@ -21,12 +21,33 @@ test("should repeat the string count times", () => {
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
 
+test("should return the original string when count is 1", () => {
+  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 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 an error when count is negative", () => {
+  const str = "hello";
+  const count = -1;
+
+  expect(() => repeatStr(str, count)).toThrow();
+});