From 8175d4d7c07d012bf810e44fb4c1c2d2a9d793d2 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 22 Oct 2025 19:43:29 +0100 Subject: [PATCH 01/11] Completed 1-get-angle-type.js exercise --- .../implement/1-get-angle-type.js | 23 ++++++++++++++----- 1 file changed, 17 insertions(+), 6 deletions(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js b/Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js index ca1dfe7f2..390509ddb 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js @@ -8,11 +8,19 @@ // Then, write the next test! :) Go through this process until all the cases are implemented function getAngleType(angle) { - if (angle === 90) { + if (angle < 90) { + return "Acute angle"; + } else if (angle === 90) { return "Right angle"; + } else if (angle > 90 && angle < 180) { + return "Obtuse angle"; + } else if (angle === 180) { + return "Straight angle"; + } else if (angle < 360) { + return "Reflex angle"; } - // Run the tests, work out what Case 2 is testing, and implement the required code here. - // Then keep going for the other cases, one at a time. + // Run the tests, work out what Case 2 is testing, and implement the required code here. + // Then keep going for the other cases, one at a time. } // The line below allows us to load the getAngleType function into tests in other files. @@ -50,14 +58,17 @@ assertEquals(acute, "Acute angle"); // When the angle is greater than 90 degrees and less than 180 degrees, // Then the function should return "Obtuse angle" const obtuse = getAngleType(120); -// ====> write your test here, and then add a line to pass the test in the function above +assertEquals(obtuse, "Obtuse angle"); // Case 4: Identify Straight Angles: // When the angle is exactly 180 degrees, // Then the function should return "Straight angle" -// ====> write your test here, and then add a line to pass the test in the function above +const straight = getAngleType(180); +assertEquals(straight, "Straight angle"); // Case 5: Identify Reflex Angles: // When the angle is greater than 180 degrees and less than 360 degrees, // Then the function should return "Reflex angle" -// ====> write your test here, and then add a line to pass the test in the function above \ No newline at end of file +// ====> write your test here, and then add a line to pass the test in the function above +const reflex = getAngleType(200); +assertEquals(reflex, "Reflex angle"); From 52ca6f05045702346b1fe608dfb36fd8ca547d9c Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 22 Oct 2025 19:48:01 +0100 Subject: [PATCH 02/11] Completed 2-is-proper-fraction.js exercise --- .../implement/2-is-proper-fraction.js | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js b/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js index a4739af77..09a878b08 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js @@ -10,6 +10,8 @@ function isProperFraction(numerator, denominator) { if (numerator < denominator) { return true; + } else { + return false; } } @@ -46,14 +48,14 @@ assertEquals(improperFraction, false); // target output: true // Explanation: The fraction -4/7 is a proper fraction because the absolute value of the numerator (4) is less than the denominator (7). The function should return true. const negativeFraction = isProperFraction(-4, 7); -// ====> complete with your assertion +assertEquals(negativeFraction, true); // Equal Numerator and Denominator check: // Input: numerator = 3, denominator = 3 // target output: false // Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false. const equalFraction = isProperFraction(3, 3); -// ====> complete with your assertion +assertEquals(equalFraction, false); // Stretch: // What other scenarios could you test for? From c947491bfdf54448d91b37be0cde2a2178d518a7 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 22 Oct 2025 21:41:43 +0100 Subject: [PATCH 03/11] Completed 3-get-card-value.js exercise --- .../implement/3-get-card-value.js | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js index 266525d1b..f74a508dd 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js @@ -8,8 +8,16 @@ // write one test at a time, and make it pass, build your solution up methodically // just make one change at a time -- don't rush -- programmers are deep and careful thinkers function getCardValue(card) { + const rank = card[0]; + if (rank === "A") { return 11; + } else if (["J", "Q", "K"].includes(rank)) { + return 10; + } else if (rank >= 2 || rank <= 10) { + return Number(rank); + } else { + return "Invalid card rank."; } } @@ -39,19 +47,25 @@ assertEquals(aceofSpades, 11); // When the function is called with such a card, // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5). const fiveofHearts = getCardValue("5♥"); -// ====> write your test here, and then add a line to pass the test in the function above +assertEquals(fiveofHearts, 5); // Handle Face Cards (J, Q, K): // Given a card with a rank of "10," "J," "Q," or "K", // When the function is called with such a card, // Then it should return the value 10, as these cards are worth 10 points each in blackjack. +const jackOfDiamonds = getCardValue("J♢"); +assertEquals(jackOfDiamonds, 10); // Handle Ace (A): // Given a card with a rank of "A", // When the function is called with an Ace, // Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack. +const ace = getCardValue("A"); +assertEquals(ace, 11); // Handle Invalid Cards: // Given a card with an invalid rank (neither a number nor a recognized face card), // When the function is called with such a card, // Then it should throw an error indicating "Invalid card rank." +const invalidRank = getCardValue("@"); +assertEquals(invalidRank, "Invalid card rank."); From 69d77556cda4668b66b900d51a8c8203f987bd90 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 22 Oct 2025 21:52:21 +0100 Subject: [PATCH 04/11] Completed 1-get-angle-type.test.js exercise --- .../rewrite-tests-with-jest/1-get-angle-type.test.js | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js index 4a92a3e82..375bf2ab9 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js @@ -12,15 +12,27 @@ test("should identify right angle (90°)", () => { // Case 2: Identify Acute Angles: // When the angle is less than 90 degrees, // Then the function should return "Acute angle" +test("should identify acute angle (<90°)", () => { + expect(getAngleType(45)).toEqual("Acute angle"); +}); // Case 3: Identify Obtuse Angles: // When the angle is greater than 90 degrees and less than 180 degrees, // Then the function should return "Obtuse angle" +test("should identify obtuse angle (>90° and <180°)", () => { + expect(getAngleType(135)).toEqual("Obtuse angle"); +}); // Case 4: Identify Straight Angles: // When the angle is exactly 180 degrees, // Then the function should return "Straight angle" +test("should identify straight angle (180°)", () => { + expect(getAngleType(180)).toEqual("Straight angle"); +}); // Case 5: Identify Reflex Angles: // When the angle is greater than 180 degrees and less than 360 degrees, // Then the function should return "Reflex angle" +test("should identify reflex angle (> 180° and < 360°)", () => { + expect(getAngleType(225)).toEqual("Reflex angle"); +}); From 0631bd4df952eee09bea83d183a56c7c06a47cb9 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 22 Oct 2025 21:58:12 +0100 Subject: [PATCH 05/11] Completed 2-is-proper-fraction.test.js exercise --- .../rewrite-tests-with-jest/2-is-proper-fraction.test.js | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js index caf08d15b..7d4b81697 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js @@ -7,7 +7,16 @@ test("should return true for a proper fraction", () => { }); // Case 2: Identify Improper Fractions: +test("should return false for an import fraction", () => { + expect(isProperFraction(3, 2)).toEqual(false); +}); // Case 3: Identify Negative Fractions: +test("should return true for a negative fraction", () => { + expect(isProperFraction(-4, 7)).toEqual(true); +}); // Case 4: Identify Equal Numerator and Denominator: +test("should return false for a fraction whose numerator and denominator are the same", () => { + expect(isProperFraction(3, 3)).toEqual(false); +}); From c98b47729af7996886e0477c374857fae3b17aad Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 22 Oct 2025 22:04:43 +0100 Subject: [PATCH 06/11] Completed 3-get-card-value.test.js exercise --- .../3-get-card-value.test.js | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js index 04418ff72..491cfad33 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js @@ -8,6 +8,25 @@ test("should return 11 for Ace of Spades", () => { }); // Case 2: Handle Number Cards (2-10): +test("should return 5 for a number card", () => { + const fiveofHearts = getCardValue("5♥"); + expect(fiveofHearts).toEqual(5); +}); + // Case 3: Handle Face Cards (J, Q, K): +test("should return 10 for a face card", () => { + const jackOfDiamonds = getCardValue("J♢"); + expect(jackOfDiamonds).toEqual(10); +}); + // Case 4: Handle Ace (A): +test("should return 11 for an Ace", () => { + const ace = getCardValue("A"); + expect(ace).toEqual(11); +}); + // Case 5: Handle Invalid Cards: +test("should return `Invalid card rank.` for an invalid card", () => { + const invalidRank = getCardValue("@"); + expect(invalidRank).toEqual("Invalid card rank."); +}); From a95ca143432b11c9c92275895b42c5f75afbeb62 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 29 Oct 2025 17:09:14 +0000 Subject: [PATCH 07/11] Address the issues from the pull request comments --- .../implement/2-is-proper-fraction.js | 12 +++++++--- .../implement/3-get-card-value.js | 4 ++-- .../2-is-proper-fraction.test.js | 10 +++++++- .../3-get-card-value.test.js | 24 ++++++++++++------- 4 files changed, 35 insertions(+), 15 deletions(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js b/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js index 09a878b08..ed0f2a236 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js @@ -8,11 +8,11 @@ // write one test at a time, and make it pass, build your solution up methodically function isProperFraction(numerator, denominator) { - if (numerator < denominator) { - return true; - } else { + 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. @@ -59,3 +59,9 @@ assertEquals(equalFraction, false); // Stretch: // What other scenarios could you test for? + +const divideByZero = isProperFraction(3, 0); +assertEquals(divideByZero, false); + +const zeroNumerator = isProperFraction(0, 3); +assertEquals(zeroNumerator, true); diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js index f74a508dd..59a3dab55 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js @@ -8,13 +8,13 @@ // write one test at a time, and make it pass, build your solution up methodically // just make one change at a time -- don't rush -- programmers are deep and careful thinkers function getCardValue(card) { - const rank = card[0]; + const rank = card.slice(0, -1); if (rank === "A") { return 11; } else if (["J", "Q", "K"].includes(rank)) { return 10; - } else if (rank >= 2 || rank <= 10) { + } else if (!isNaN(rank) && Number(rank) >= 2 && Number(rank) <= 10) { return Number(rank); } else { return "Invalid card rank."; diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js index 7d4b81697..e55046e35 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js @@ -7,15 +7,23 @@ test("should return true for a proper fraction", () => { }); // Case 2: Identify Improper Fractions: -test("should return false for an import fraction", () => { +test("should return false for an improper fraction", () => { expect(isProperFraction(3, 2)).toEqual(false); }); +test("should return false for an improper fraction", () => { + expect(isProperFraction(-5, 3)).toEqual(false); +}); + // Case 3: Identify Negative Fractions: test("should return true for a negative fraction", () => { expect(isProperFraction(-4, 7)).toEqual(true); }); +test("should return true for a negative fraction", () => { + expect(isProperFraction(4, -7)).toEqual(true); +}); + // Case 4: Identify Equal Numerator and Denominator: test("should return false for a fraction whose numerator and denominator are the same", () => { expect(isProperFraction(3, 3)).toEqual(false); diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js index 491cfad33..9ce3d003e 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js @@ -8,20 +8,26 @@ test("should return 11 for Ace of Spades", () => { }); // Case 2: Handle Number Cards (2-10): -test("should return 5 for a number card", () => { - const fiveofHearts = getCardValue("5♥"); - expect(fiveofHearts).toEqual(5); -}); +for (let i = 2; i <= 10; i++) { + test(`should return ${i} for a number card ${i}♥`, () => { + const card = getCardValue(`${i}♥`); + expect(card).toEqual(i); + }); +} // Case 3: Handle Face Cards (J, Q, K): -test("should return 10 for a face card", () => { - const jackOfDiamonds = getCardValue("J♢"); - expect(jackOfDiamonds).toEqual(10); -}); +const faceCards = ["J", "Q", "K"]; + +for (let faceCard of faceCards) { + test(`should return 10 for a card card ${faceCard}♢`, () => { + const card = getCardValue(`${faceCard}♢`); + expect(card).toEqual(10); + }); +} // Case 4: Handle Ace (A): test("should return 11 for an Ace", () => { - const ace = getCardValue("A"); + const ace = getCardValue("A♠"); expect(ace).toEqual(11); }); From 31270ee4a949894997a0ff98a8d01d907e77ffc5 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 29 Oct 2025 19:01:50 +0000 Subject: [PATCH 08/11] Address the issues from the pull request comments again --- .../implement/3-get-card-value.js | 2 +- .../rewrite-tests-with-jest/2-is-proper-fraction.test.js | 6 ------ 2 files changed, 1 insertion(+), 7 deletions(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js index 59a3dab55..a9aa8f281 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js @@ -14,7 +14,7 @@ function getCardValue(card) { return 11; } else if (["J", "Q", "K"].includes(rank)) { return 10; - } else if (!isNaN(rank) && Number(rank) >= 2 && Number(rank) <= 10) { + } else if (!isNaN(rank) && rank >= 2 && rank <= 10) { return Number(rank); } else { return "Invalid card rank."; diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js index e55046e35..335863fed 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js @@ -9,18 +9,12 @@ test("should return true for a proper fraction", () => { // Case 2: Identify Improper Fractions: test("should return false for an improper fraction", () => { expect(isProperFraction(3, 2)).toEqual(false); -}); - -test("should return false for an improper fraction", () => { expect(isProperFraction(-5, 3)).toEqual(false); }); // Case 3: Identify Negative Fractions: test("should return true for a negative fraction", () => { expect(isProperFraction(-4, 7)).toEqual(true); -}); - -test("should return true for a negative fraction", () => { expect(isProperFraction(4, -7)).toEqual(true); }); From 0bf44366e4ed1abc0a0bff533f7860a269efc971 Mon Sep 17 00:00:00 2001 From: Ammad Date: Wed, 29 Oct 2025 21:36:19 +0000 Subject: [PATCH 09/11] Remove isNaN check because of coerced conversion --- .../1-implement-and-rewrite-tests/implement/3-get-card-value.js | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js index a9aa8f281..58f9748a0 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js @@ -14,7 +14,7 @@ function getCardValue(card) { return 11; } else if (["J", "Q", "K"].includes(rank)) { return 10; - } else if (!isNaN(rank) && rank >= 2 && rank <= 10) { + } else if (rank >= 2 && rank <= 10) { return Number(rank); } else { return "Invalid card rank."; From 3f52c42407bd7dce5f5616e114c57695cd71a5e5 Mon Sep 17 00:00:00 2001 From: Ammad Date: Thu, 30 Oct 2025 14:30:41 +0000 Subject: [PATCH 10/11] Throw an error for "Invalid card rank." and update the test to expect an error to be thrown --- .../implement/3-get-card-value.js | 2 +- .../rewrite-tests-with-jest/3-get-card-value.test.js | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js index 58f9748a0..efbe14b55 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js @@ -17,7 +17,7 @@ function getCardValue(card) { } else if (rank >= 2 && rank <= 10) { return Number(rank); } else { - return "Invalid card rank."; + return new Error("Invalid card rank."); } } diff --git a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js index 9ce3d003e..d7b5737a0 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js +++ b/Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js @@ -33,6 +33,5 @@ test("should return 11 for an Ace", () => { // Case 5: Handle Invalid Cards: test("should return `Invalid card rank.` for an invalid card", () => { - const invalidRank = getCardValue("@"); - expect(invalidRank).toEqual("Invalid card rank."); + expect(() => getCardValue("@").toThrow("Invalid card rank.")); }); From e8fd53d2a139cb97391f753c4a46c2e31b504358 Mon Sep 17 00:00:00 2001 From: Ammad Date: Thu, 30 Oct 2025 14:55:21 +0000 Subject: [PATCH 11/11] Improve getCardValue() to handle the parameter as well as validating the rank when it comes to handling number cards --- .../implement/3-get-card-value.js | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js index efbe14b55..2b80fbb56 100644 --- a/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js +++ b/Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js @@ -8,13 +8,13 @@ // write one test at a time, and make it pass, build your solution up methodically // just make one change at a time -- don't rush -- programmers are deep and careful thinkers function getCardValue(card) { - const rank = card.slice(0, -1); + const rank = card.length > 1 ? card.slice(0, -1) : card; if (rank === "A") { return 11; } else if (["J", "Q", "K"].includes(rank)) { return 10; - } else if (rank >= 2 && rank <= 10) { + } else if (/^(?:[2-9]|10)$/.test(rank)) { return Number(rank); } else { return new Error("Invalid card rank."); @@ -67,5 +67,13 @@ assertEquals(ace, 11); // Given a card with an invalid rank (neither a number nor a recognized face card), // When the function is called with such a card, // Then it should throw an error indicating "Invalid card rank." + +// assertEquals() doesn’t handle an actual Error being thrown, so the console will display: +// +// Expected Error: Invalid card rank. to equal Invalid card rank. +// 3-get-card-value.js:32 +// Assertion failed: Expected Error: Invalid card rank. to equal Invalid card rank. +// +// It will work if getCardValue() returns a string instead. const invalidRank = getCardValue("@"); assertEquals(invalidRank, "Invalid card rank.");