London | 26-ITP-Jan | Raihan Sharif | Sprint 3 | testing with jest

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

@@ -15,7 +15,22 @@
 // execute the code to ensure all tests pass.
 
 function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle < 90) {
+    return "Acute angle";
+  }
+  if (angle === 90) {
+    return "Right angle";
+  }
+  if (angle < 180) {
+    return "Obtuse angle";
+  }
+  if (angle === 180) {
+    return "Straight angle";
+  }
+  if (angle <= 360) {
+    return "Reflex angle";
+  }
+  return "Invalid angle";
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -33,5 +48,20 @@ function assertEquals(actualOutput, targetOutput) {
 
 // TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
+const acute = getAngleType(70);
+assertEquals(acute, "Acute angle");
+
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+
+const obtuse = getAngleType(95);
+assertEquals(obtuse, "Obtuse angle");
+
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+
+const reflex = getAngleType(280);
+assertEquals(reflex, "Reflex angle");
+
+const invalid = getAngleType(180);
+assertEquals(invalid, "Invalid angle");

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

@@ -11,7 +11,8 @@
 // execute the code to ensure all tests pass.
 
 function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (denominator === 0) return false;
+  return numerator < denominator ? true : false;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +32,8 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(2, 1), false);
+assertEquals(isProperFraction(0, 0), false);
+assertEquals(isProperFraction(-0, 0), false);
+assertEquals(isProperFraction(-5, 4), true);
+assertEquals(isProperFraction(-4, -5), false);

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

@@ -22,7 +22,39 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  const rank = [
+    "A",
+    "2",
+    "3",
+    "4",
+    "5",
+    "6",
+    "7",
+    "8",
+    "9",
+    "10",
+    "J",
+    "Q",
+    "K",
+  ];
+  const suit = ["♠", "♥", "♦", "♣"];
+
+  const cardValue = card.slice(0, -1);
+  console.log("card value: " + cardValue);
+  const cardSuit = card[card.length - 1];
+
+  if (!rank.includes(cardValue) || !suit.includes(cardSuit)) {
+    throw new Error("invalid input");
+  }
+
+  if ("A" === cardValue) {
+    return 11;
+  }
+  if (["J", "Q", "K"].includes(cardValue)) {
+    return 10;
+  }
+
+  return Number(cardValue);
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -40,6 +72,13 @@ 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("2♠"), 2);
+assertEquals(getCardValue("5♠"), 5);
+assertEquals(getCardValue("10♠"), 10);
 
 // Handling invalid cards
 try {

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

@@ -11,6 +11,34 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
   expect(getAngleType(1)).toEqual("Acute angle");
   expect(getAngleType(45)).toEqual("Acute angle");
   expect(getAngleType(89)).toEqual("Acute angle");
+  expect(getAngleType(95)).not.toEqual("Acute angle");
+});
+test(`should return "Right angle" when angle is 90)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(90)).toEqual("Right angle");
+  expect(getAngleType(45)).not.toEqual("Right angle");
+  expect(getAngleType(99)).not.toEqual("Right angle");
+});
+
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(90)).not.toEqual("Obtuse angle");
+  expect(getAngleType(100)).toEqual("Obtuse angle");
+  expect(getAngleType(180)).not.toEqual("Obtuse angle");
+  expect(getAngleType(200)).not.toEqual("Obtuse angle");
+});
+
+test(`should return "Straight angle" when (angle is 180)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(179)).not.toEqual("Straight angle");
+  expect(getAngleType(180)).toEqual("Straight angle");
+  expect(getAngleType(181)).not.toEqual("Straight angle");
+});
+test(`should return "Reflex angle" when (180 < angle < 361)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(179)).not.toEqual("Reflex angle");
+  expect(getAngleType(371)).not.toEqual("Reflex angle");
+  expect(getAngleType(200)).toEqual("Reflex angle");
 });
 
 // Case 2: Right angle

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

@@ -7,4 +7,33 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 // Special case: numerator is zero
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
+  expect(isProperFraction(0, 0)).toEqual(false);
+  expect(isProperFraction(-1, 0)).toEqual(false);
+});
+
+test(`should return true when numerator and denominator both positive and numerator < denominator`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+  expect(isProperFraction(4, 5)).toEqual(true);
+  expect(isProperFraction(2, 3)).toEqual(true);
+});
+
+test(`should return true when numerator and denominator both negative and numerator < denominator`, () => {
+  expect(isProperFraction(-3, -2)).toEqual(true);
+});
+
+test(`should return true when numerator is negative and numerator < denominator`, () => {
+  expect(isProperFraction(-3, 2)).toEqual(true);
+});
+
+test(`should return false when numerator > denominator`, () => {
+  expect(isProperFraction(2, 1)).toEqual(false);
+});
+
+test(`should return false when numerator > denominator, negative nums`, () => {
+  expect(isProperFraction(-1, -2)).toEqual(false);
+});
+
+test(`should return false when numerator == denominator`, () => {
+  expect(isProperFraction(-2, -2)).toEqual(false);
+  expect(isProperFraction(2, 2)).toEqual(false);
 });

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

@@ -13,8 +13,27 @@ test(`Should return 11 when given an ace card`, () => {
 //   Number Cards (2-10)
 //   Face Cards (J, Q, K)
 //   Invalid Cards
+test(`Should return 10 when given a K, Q or J card`, () => {
+  expect(getCardValue("K♠")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+  expect(getCardValue("J♠")).toEqual(10);
+});
+
+test(`Should return the number of the card given a numeric card card`, () => {
+  expect(getCardValue("10♠")).toEqual(10);
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("3♠")).toEqual(3);
+});
+
+test(`Should throw an error if invalid card`, () => {
+  expect(() => {
+    getCardValue("2😬");
+  }).toThrow();
+  expect(() => {
+    getCardValue("22♠");
+  }).toThrow();
+});
 
 // 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.js

@@ -1,5 +1,11 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let total = 0;
+  for (const char of stringOfCharacters) {
+    if (char === findCharacter) {
+      total += 1;
+    }
+  }
+  return total;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,21 @@ 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 zero occurrences of a character", () => {
+  const str = "aaaaa";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario: Non-consecutive occurrances
+// Given the input string `str`,
+// And a character `char` that appears in more than one block within `str`.
+// When the function is called with these inputs,
+// Then it should return the number of total occurrances.
+test("should count non-contiguous occurrences of a character", () => {
+  const str = "aaaaabba";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(6);
+});

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

@@ -1,5 +1,19 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  // 11 is a special case
+  if (num === 11) {
+    return "11th";
+  }
+  const lastDigit = num % 10;
+  switch (lastDigit) {
+    case 1:
+      return String(num) + "st";
+    case 2:
+      return String(num) + "nd";
+    case 3:
+      return String(num) + "rd";
+    default:
+      return String(num) + "th";
+  }
 }
 
 module.exports = getOrdinalNumber;

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

@@ -18,3 +18,41 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// Case 2: Numbers ending with 2
+// When the number ends with 2
+// Then the function should return a string by appending "nd" to the number.
+test("should append 'nd' for numbers ending with 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
+});
+
+// Case 3: Numbers ending with 3
+// When the number ends with 3
+// Then the function should return a string by appending "rd" to the number.
+test("should append 'rd' for numbers ending with 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(223)).toEqual("223rd");
+});
+
+// Case 4: the general(ish) case
+// When numbers end with 0, 4, 5, 6, 7, 8, 9
+// The function should return a string by appending "th" to the number
+test("should append 'th' for numbers ending with 0, 4, 5, 6, 7, 8, 9", () => {
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(24)).toEqual("24th");
+  expect(getOrdinalNumber(25)).toEqual("25th");
+  expect(getOrdinalNumber(46)).toEqual("46th");
+  expect(getOrdinalNumber(57)).toEqual("57th");
+  expect(getOrdinalNumber(78)).toEqual("78th");
+  expect(getOrdinalNumber(89)).toEqual("89th");
+});
+
+// Case 5: The special case of 11
+// When the number is 11
+// Then the function should return a string by appending "th" to the number.
+test("should append 'th' for 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});

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

@@ -1,5 +1,18 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("invalid input: negative number");
+  }
+  if (count === 1) {
+    return str;
+  }
+
+  if (count === 0) {
+    return "";
+  }
+
+  if (count > 1) {
+    return str.repeat(count);
+  }
 }
 
 module.exports = repeatStr;

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

@@ -8,8 +8,7 @@ const repeatStr = require("./repeat-str");
 // Given a target string `str` and a positive integer `count` greater than 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return a string that contains the original `str` repeated `count` times.
-
-test("should repeat the string count times", () => {
+test("should repeat the string 3 times", () => {
   const str = "hello";
   const count = 3;
   const repeatedStr = repeatStr(str, count);
@@ -20,13 +19,30 @@ 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.
+test("should not repeat string with a count of 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 empty string with a count of 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 error when count < 0", () => {
+  const str = "hello";
+  const count = -2;
+  expect(() => repeatStr(str, count)).toThrow();
+});