London | 26-ITP-May | Yonatan Teklemariam | Sprint 3 | Implement and re-write tests

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

@@ -15,13 +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.
 // This will be useful in the "rewrite tests with jest" step.
 module.exports = getAngleType;
-
 // This helper function is written to make our assertions easier to read.
 // If the actual output matches the target output, the test will pass
 function assertEquals(actualOutput, targetOutput) {
@@ -33,5 +47,15 @@ function assertEquals(actualOutput, targetOutput) {
 
 // TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
+const acute = getAngleType(45);
+assertEquals(acute, "Acute angle");
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+const obtuse = getAngleType(135);
+assertEquals(obtuse, "Obtuse angle");
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
+const invalidAngle = getAngleType(-10);
+assertEquals(invalidAngle, "Invalid angle");

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

@@ -11,7 +11,16 @@
 // execute the code to ensure all tests pass.
 
 function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (numerator === 0) {
+    return false;
+  }
+  if (denominator === 0) {
+    return false;
+  }
+  if (Number.isNaN(numerator) || Number.isNaN(denominator)) {
+    return false;
+  }
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -25,6 +34,25 @@ function assertEquals(actualOutput, targetOutput) {
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
 }
+// Proper fractions
+assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(3, 4), true);
+assertEquals(isProperFraction(-1, 5), true);
+assertEquals(isProperFraction(1, -5), true);
+
+// Improper fractions
+assertEquals(isProperFraction(5, 3), false);
+assertEquals(isProperFraction(10, 10), false);
+assertEquals(isProperFraction(-7, 3), false);
+
+// Zero cases
+assertEquals(isProperFraction(0, 5), false);
+assertEquals(isProperFraction(3, 0), false);
+
+// NaN cases
+assertEquals(isProperFraction(NaN, 5), false);
+assertEquals(isProperFraction(3, NaN), false);
+assertEquals(isProperFraction(NaN, NaN), false);
 
 // TODO: Write tests to cover all cases.
 // What combinations of numerators and denominators should you test?

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

@@ -22,7 +22,34 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  const ranks = [
+    "A",
+    "2",
+    "3",
+    "4",
+    "5",
+    "6",
+    "7",
+    "8",
+    "9",
+    "10",
+    "J",
+    "Q",
+    "K",
+  ];
+  const suits = ["♠", "♥", "♦", "♣"];
+
+  let rank = card.slice(0, -1); // extracting the rank from the input
+  let suit = card.slice(-1); // extracting the suit from the input
+  if (!suits.includes(suit)) {
+    throw new Error("Invalid suit");
+  }
+  if (!ranks.includes(rank)) {
+    throw new Error("Invalid rank");
+  }
+  if (rank === "A") return 11;
+  if (["J", "Q", "K"].includes(rank)) return 10;
+  return Number(rank);
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -39,7 +66,19 @@ function assertEquals(actualOutput, targetOutput) {
 
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
 // Examples:
-assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("J♥"), 10);
+// Number cards
+assertEquals(getCardValue("2♠"), 2);
+assertEquals(getCardValue("9♥"), 9);
+assertEquals(getCardValue("10♦"), 10);
+
+// Face cards
+assertEquals(getCardValue("J♣"), 10);
+assertEquals(getCardValue("Q♦"), 10);
+assertEquals(getCardValue("K♥"), 10);
+
+// Ace
+assertEquals(getCardValue("A♠"), 11);
 
 // Handling invalid cards
 try {
@@ -52,3 +91,30 @@ try {
 }
 
 // What other invalid card cases can you think of?
+try {
+  getCardValue("");
+  console.error("Error NOT thrown for empty string");
+} catch (e) {
+  console.log("Error thrown for empty string 🎉");
+}
+
+try {
+  getCardValue("1♠");
+  console.error("Error NOT thrown for invalid rank");
+} catch (e) {
+  console.log("Error thrown for invalid rank 🎉");
+}
+
+try {
+  getCardValue("A");
+  console.error("Error NOT thrown for missing suit");
+} catch (e) {
+  console.log("Error thrown for missing suit 🎉");
+}
+
+try {
+  getCardValue("A?");
+  console.error("Error NOT thrown for invalid suit");
+} catch (e) {
+  console.log("Error thrown for invalid suit 🎉");
+}

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

@@ -14,7 +14,33 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" when angle === 90`, () => {
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
 // Case 3: Obtuse angles
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 // Case 4: Straight angle
+test(`should return "Straight angle" when angle === 180`, () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
 // Case 5: Reflex angles
+test(`should return "Reflex angle" when (180 < angle < 360)`, () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(250)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+
 // Case 6: Invalid angles
+test(`should return "Invalid angle" for angles outside 0–360`, () => {
+  expect(getAngleType(0)).toEqual("Invalid angle"); // boundary
+  expect(getAngleType(360)).toEqual("Invalid angle"); // boundary
+  expect(getAngleType(-10)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+});

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

@@ -4,7 +4,40 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 
 // TODO: Write tests in Jest syntax to cover all combinations of positives, negatives, zeros, and other categories.
 
-// Special case: numerator is zero
+// Special case: denominator is zero
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+
+//Special case: numerator is zero
+test(`should return false when numerator is zero`, () => {
+  expect(isProperFraction(0, 1)).toEqual(false);
+});
+// Proper functions with absolute numerator < absolute denominator
+test(`should return true for proper positive fractions`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+  expect(isProperFraction(3, 4)).toEqual(true);
+});
+// Proper functions with negative numbers
+test(`should return true for proper negative fractions`, () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+  expect(isProperFraction(1, -3)).toEqual(true);
+  expect(isProperFraction(-2, -5)).toEqual(true);
+});
+// Improper functions with absolute numerator >= absolute denominator
+test(`should return false for improper fractions`, () => {
+  expect(isProperFraction(5, 3)).toEqual(false);
+  expect(isProperFraction(10, 10)).toEqual(false);
+  expect(isProperFraction(-7, 3)).toEqual(false);
+});
+// Special cases: numerator or denominator is NAN
+test(`should return false when numerator or denominator is NaN`, () => {
+  expect(isProperFraction(NaN, 5)).toEqual(false);
+  expect(isProperFraction(3, NaN)).toEqual(false);
+  expect(isProperFraction(NaN, NaN)).toEqual(false);
+});
+// Special cases: non-number strings
+test(`should return false for non-numeric strings`, () => {
+  expect(isProperFraction("a", 5)).toEqual(false);
+  expect(isProperFraction(3, "b")).toEqual(false);
+});

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

@@ -9,6 +9,38 @@ test(`Should return 11 when given an ace card`, () => {
   expect(getCardValue("A♠")).toEqual(11);
 });
 
+// Case 2: Number Cards (2-10)
+test(`Should return correct values for number cards`, () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("7♥")).toEqual(7);
+  expect(getCardValue("9♦")).toEqual(9);
+  expect(getCardValue("10♣")).toEqual(10);
+});
+
+// Case 3: Face Cards (J, Q, K)
+test(`Should return 10 for face cards J, Q, K`, () => {
+  expect(getCardValue("J♠")).toEqual(10);
+  expect(getCardValue("Q♥")).toEqual(10);
+  expect(getCardValue("K♦")).toEqual(10);
+});
+
+// Case 4: Invalid cards
+test(`Should throw an error for invalid rank`, () => {
+  expect(() => getCardValue("1♠")).toThrowError("Invalid rank");
+});
+
+test(`Should throw an error for invalid suit`, () => {
+  expect(() => getCardValue("A?")).toThrowError("Invalid suit");
+});
+
+test(`Should throw an error for missing suit`, () => {
+  expect(() => getCardValue("A")).toThrowError();
+});
+
+test(`Should throw an error for empty string`, () => {
+  expect(() => getCardValue("")).toThrowError();
+});
+
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
 //   Face Cards (J, Q, K)
@@ -17,4 +49,3 @@ test(`Should return 11 when given an ace card`, () => {
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation:
 // https://jestjs.io/docs/expect#tothrowerror
-

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

@@ -18,6 +18,25 @@ test("should count multiple occurrences of a character", () => {
 });
 
 // Scenario: No Occurrences
+test(`should return zero the character doesn't exist in the string`, () => {
+  const str = "bravo";
+  const char = "u";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Empty String
+test(`should return zero when the string is empty`, () => {
+  expect(countChar("", "a")).toEqual(0);
+});
+
+// Scenario: Multiple Occurrences
+test("should count multiple occurrences of characters (including mixed and case-sensitive)", () => {
+  expect(countChar("aaaaa", "a")).toEqual(5); // simple multiple
+  expect(countChar("1-2-3-4-5-", "-")).toEqual(5); // mixed characters
+  expect(countChar("AaAa", "A")).toEqual(2); // case sensitivity
+});
+
 // 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.test.js

@@ -13,8 +13,37 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Case 1: Numbers ending with 1 (but not 11)
 // When the number ends with 1, except those ending with 11,
 // Then the function should return a string by appending "st" to the number.
+
 test("should append 'st' for numbers ending with 1, except those ending with 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// Case 2: Numbers ending with 2 (but NOT 12)
+test("should append 'nd' for numbers ending with 2, except those ending with 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(102)).toEqual("102");
+});
+
+// Case 3: Numbers ending with 3 (but NOT 13)
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
+});
+
+// Case 4: Numbers ending with 11, 12, or 13 --- 11,12,13,111,121,131,
+test("should append 'th' for numbers ending with 11, 12, 13", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});
+
+// Case 5: Numbers ending with larger numbers of 111, 121, 131
+test("should append 'th' for numbers ending with 111, 121, 131", () => {
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(121)).toEqual("121th");
+  expect(getOrdinalNumber(131)).toEqual("131th");
+});

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

@@ -1,7 +1,7 @@
-function repeatStr() {
+function repeatStr(str, count) {
   // 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 str.repeat(count);
 }
 
 module.exports = repeatStr;