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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,19 @@
// execute the code to ensure all tests pass.

function getAngleType(angle) {
// TODO: Implement this function
if (0 < angle && angle < 90) {
return "Acute angle";
} else if (angle === 90) {
return "Right angle";
} else if (90 < angle && angle < 180) {
return "Obtuse angles";
Comment on lines +21 to +23

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Should some in singular form and some in plural form?

} else if (angle === 180) {
return "Straight angle";
} else if (180 < angle && angle < 360) {
return "Reflex angles";
} else {
return "Invalid angles";
}
}

// The line below allows us to load the getAngleType function into tests in other files.
Expand All @@ -33,5 +45,15 @@ function assertEquals(actualOutput, targetOutput) {

// TODO: Write tests to cover all cases, including boundary and invalid cases.
// Example: Identify Right Angles
const Acute = getAngleType(0.5);
assertEquals(Acute, "Acute angle");
const right = getAngleType(90);
assertEquals(right, "Right angle");
const Obtuse = getAngleType(179);
assertEquals(Obtuse, "Obtuse angle");
const Straight = getAngleType(180);
assertEquals(Straight, "Straight angle");
const Reflex = getAngleType(181);
assertEquals(Reflex, "Reflex angle");
const Invalid = getAngleType(361);
assertEquals(Invalid, "Invalid angle");
Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,13 @@
// execute the code to ensure all tests pass.

function isProperFraction(numerator, denominator) {
// TODO: Implement this function
if (Math.abs(numerator) < Math.abs(denominator)) {
return true;
} else if (denominator === 0) {
return false;
} else {
return false;
}
Comment on lines +16 to +20

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Code on lines 16-20 could further be simplified.

}

// The line below allows us to load the isProperFraction function into tests in other files.
Expand All @@ -31,3 +37,9 @@ function assertEquals(actualOutput, targetOutput) {

// Example: 1/2 is a proper fraction
assertEquals(isProperFraction(1, 2), true);
assertEquals(isProperFraction(0, 0.2), true);
assertEquals(isProperFraction(2, 0), false);
assertEquals(isProperFraction(11, 8), false);
assertEquals(isProperFraction(0, 1), true);
assertEquals(isProperFraction(10, 25), true);
assertEquals(isProperFraction(0, 0), false);
Original file line number Diff line number Diff line change
Expand Up @@ -22,9 +22,39 @@
// execute the code to ensure all tests pass.

function getCardValue(card) {
// TODO: Implement this function
const validRank = [

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It's common practice to use plural names for arrays.

"A",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"J",
"Q",
"K",
];
const validSuits = ["♠", "♣", "♦", "♥"];
let rank = card.slice(0, -1);
let suit = card.slice(-1);
if (!validSuits.includes(suit)) {
throw new Error("Invalid Cards");
}
if (!validRank.includes(rank)) {
throw new Error("Invalid Cards");
}
if (rank === "A") {
return 11;
}
if (["J", "Q", "K"].includes(rank)) {
return 10;
} else {
return Number(rank);
}
}

// The line below allows us to load the getCardValue function into tests in other files.
// This will be useful in the "rewrite tests with jest" step.
module.exports = getCardValue;
Expand All @@ -40,7 +70,13 @@ function assertEquals(actualOutput, targetOutput) {
// TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
// Examples:
assertEquals(getCardValue("9♠"), 9);

assertEquals(getCardValue("A♠"), 11);
assertEquals(getCardValue("J♣"), 10);
assertEquals(getCardValue("K♦"), 10);
assertEquals(getCardValue("Q♦"), 10);
assertEquals(getCardValue("7♣"), 7);
assertEquals(getCardValue("10♦"), 10);
assertEquals(getCardValue("2♣"), 2);
// Handling invalid cards
try {
getCardValue("invalid");
Expand All @@ -52,3 +88,51 @@ try {
}

// What other invalid card cases can you think of?
try {
getCardValue("1♥");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue(" ");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue("Z♠");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue("G♠");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue("10X");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue("B♠");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue("♠");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
try {
getCardValue("B♠♠");
console.error("Error was not thrown for invalid card 😢");
} catch (e) {
console.log("Error thrown for invalid card 🎉");
}
Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,34 @@ 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 angles" when (90 < angle < 180)`, () => {
expect(getAngleType(91)).toEqual("Obtuse angles");
expect(getAngleType(179)).toEqual("Obtuse angles");
expect(getAngleType(145)).toEqual("Obtuse angles");
expect(getAngleType(92)).toEqual("Obtuse angles");
expect(getAngleType(178)).toEqual("Obtuse angles");
});
// 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 angles" when (180 < angle < 360)`, () => {
expect(getAngleType(181)).toEqual("Reflex angles");
expect(getAngleType(190)).toEqual("Reflex angles");
expect(getAngleType(345)).toEqual("Reflex angles");
expect(getAngleType(359)).toEqual("Reflex angles");
expect(getAngleType(277)).toEqual("Reflex angles");
});
// Case 6: Invalid angles
test(`should return "Invalid angles" when (angle )`, () => {
expect(getAngleType(-60)).toEqual("Invalid angles");
expect(getAngleType(450)).toEqual("Invalid angles");
expect(getAngleType(-2)).toEqual("Invalid angles");
expect(getAngleType(361)).toEqual("Invalid angles");
expect(getAngleType(890)).toEqual("Invalid angles");
});

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  • Could consider explicitly specify the range of the invalid angles in the test description.

  • Why not test the boundary cases?

Original file line number Diff line number Diff line change
Expand Up @@ -8,3 +8,14 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
test(`should return false when denominator is zero`, () => {
expect(isProperFraction(1, 0)).toEqual(false);
});
test(`should return false when the denominator less nominator`, () => {
expect(isProperFraction(7, 2)).toEqual(false);
expect(isProperFraction(-17, -2)).toEqual(false);
expect(isProperFraction(0.5, 0.1)).toEqual(false);
});
test(`should return true when denominator is greater than nominator`, () => {
expect(isProperFraction(2, 8)).toEqual(true);
Comment on lines +11 to +17

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  • The test description applies only when the values being compared are the absolute values of the denominator and numerator. You could consider using pseudo-code and notations like abs(...) or | ... | to denote absolute value in the test description.

  • Why not test the boundary cases?

Note: The correct term is numerator (not nominator).

expect(isProperFraction(-3, -10)).toEqual(true);
expect(isProperFraction(-3, 7)).toEqual(true);
expect(isProperFraction(8, 17)).toEqual(true);
});
Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,45 @@ const getCardValue = require("../implement/3-get-card-value");
test(`Should return 11 when given an ace card`, () => {
expect(getCardValue("A♠")).toEqual(11);
});
//Case 2: Face Cards (J, Q, K)
test(`Should return 10 when given a Face Cards`, () => {
expect(getCardValue("J♣")).toEqual(10);
expect(getCardValue("K♦")).toEqual(10);
expect(getCardValue("Q♥")).toEqual(10);
});
//Case 3: Number Cards (2-10)
test(`Should return the Number it self when a given Number card`, () => {
expect(getCardValue("2♣")).toEqual(2);
expect(getCardValue("10♦")).toEqual(10);
expect(getCardValue("4♥")).toEqual(4);
expect(getCardValue("6♣")).toEqual(6);
expect(getCardValue("7♠")).toEqual(7);
expect(getCardValue("9♥")).toEqual(9);
});
// Invalid Cards
test(`Should return Invalid Cards when given Invalid Cards`, () => {
expect(() => {
getCardValue("22♣");
}).toThrow("Invalid Cards");
expect(() => {
getCardValue("22♣");
}).toThrow("Invalid Cards");
expect(() => {
getCardValue("11♦");
}).toThrow("Invalid Cards");
expect(() => {
getCardValue("4♥♥");
}).toThrow("Invalid Cards");
expect(() => {
getCardValue("");
}).toThrow("Invalid Cards");
expect(() => {
getCardValue("♠");
}).toThrow("Invalid Cards");
expect(() => {
getCardValue("-9♥");
}).toThrow("Invalid Cards");
});

// Suggestion: Group the remaining test data into these categories:
// Number Cards (2-10)
Expand All @@ -17,4 +56,3 @@ 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

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