Birmingham | ITP-Jan-26 | Ayodeji Ayorinde | Sprint 3| 1-implement-and-rewrite-tests-2

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,4 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+//Line 3 is adding 1 to the initial values of count which is 0 and reassing the new value (1+0 =1) to count

Sprint-1/1-key-exercises/2-initials.js

@@ -6,6 +6,7 @@ let lastName = "Johnson";
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
 let initials = ``;
-
+initials = firstName.slice(0, 1) + middleName.slice(0, 1) + lastName.slice(0, 1)
+console.log(initials)
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

Sprint-1/1-key-exercises/3-paths.js

@@ -17,7 +17,10 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+const dir = filePath.substring(0, lastSlashIndex);
+console.log(`The dir part of the filePath variable is  ${dir}`);
+const lastDotIndex = filePath.lastIndexOf(".");
+const ext = filePath.slice(lastDotIndex + 1);
+console.log(`The ext of ${filePath} is ${ext}`);
 
-// https://www.google.com/search?q=slice+mdn
+// https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -7,3 +7,13 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+//ANSWER
+// const minimum = 1 sets the minimum value to 1
+// const maximum = 100 sets the maximum value to 100
+//Math.random() generates a random decimal number, zero inclusive but not 1.
+// (maximum - minimum + 1) calculates how many whole numbers maximum  and minimum
+// Math.random() * (maximum - minimum + 1) ensures that the random decimal is within  the desired range.
+// Math.floor(...) rounds the number down to the nearest whole integer
+// + minimum shifts the range upward so it starts at minimum instead of 0
+// The program generated random numbers from 0 to 100 as whole integers.

Sprint-1/2-mandatory-errors/0.js

@@ -1,2 +1,4 @@
 This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
+We don't want the computer to run these 2 lines - how can we solve this problem?
+//ANSWER:
+//We change the two lines to comments by using double forward slash (//) at the beginning of the two lines.

Sprint-1/2-mandatory-errors/1.js

@@ -2,3 +2,9 @@
 
 const age = 33;
 age = age + 1;
+// ANSWER
+// In the solution above, 'age' is a constant variable becuse the keyword 'const' was used with it hence the value cannot change.
+
+// Solution:
+let age = 33;
+age += 1;

Sprint-1/2-mandatory-errors/2.js

@@ -3,3 +3,10 @@
 
 console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+//ANSWER:
+// The 'cityOfBirth' was not assigned before the console.log statement
+// Solution will be to switch the lines as shown below:
+
+
+const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);

Sprint-1/2-mandatory-errors/3.js

@@ -7,3 +7,6 @@ const last4Digits = cardNumber.slice(-4);
 // Then run the code and see what error it gives.
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+const cardNumber2 = String(cardNumber);
+const last4Digits = cardNumber2.slice(-4);

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,6 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+//const 12HourClockTime = "20:53";
+//const 24hourClockTime = "08:53";
+
+// SUggested Solutions:
+const ClockTime12Hour = "20:53";
+const ClockTime24hour = "08:53";

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,13 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
-
+//ANSWER: Four function calls asides console.log.
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
-
+//ANSWER: The comma in the replaceAll() function in Line 5 is missing between the rguments. Put the comma back in to fix it.
 // c) Identify all the lines that are variable reassignment statements
-
+//ANSWER: Lines that are variable reassignment statements are Lines 4 & 5.
 // d) Identify all the lines that are variable declarations
-
+//ANSWER: Variable declarations line: 1,2,7,& 8
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+//ANSWER: The expression first removes the comma(,) in carPrice and then converts it to a number.
+

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -12,14 +12,16 @@ console.log(result);
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
-
+//ANSWER: There were six variable declarations
 // b) How many function calls are there?
-
+//ANSWER: There were  no function calls except for the log() function
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
-
+//ANSWER: The remainder (%) operator returns the remainder left over when one operand is divided by a second operand. It always takes the sign of the dividend.
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
+//ANSWER: Line 4 with find the remainder whenmovieLength is divided by 60 and assigns the remainder to remainingSeconds (24)
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
-
+//ANSWER: The variable result represents the total lenth of the movie which shows the total hours, minutes and seconds remain in string format.
+// A better name will be movieTotalTime.
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+//ANSWER: The code semed to  work for all values of movieLength.

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -25,3 +25,13 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+// 2. Lines 3 to 6: extracts "399" as a string and assigns the values to penceStringWithoutTrailingP.
+//    It uses the substring to extract from position 0 to 3.
+// 3. Line 8: padStart is used to pad the values in penceStringWithoutTrailingP with "0" from the start of the value to make up a length of 3.
+//    Since penceStringWithoutTrailingP already has "399" with a length of 3, no padding is done.
+// 4. Line 9 to 12: substring is used to extract from paddedPenceNumberString,  starting from position 0 to 1 giving 3 which is stored in the variable pounds.
+// 5. Line 14 to 16: substring is used to extract from paddedPenceNumberString, starting from position 1 to the end givin "99"
+//    "99" is padded with "0" from the end of the value to make a length of 2 but sincw "99" already has a length of 2, no padding is done.
+//    "99" is assigned to the variable pence.
+// 6. Line 18: uses console.log() to print the values of pounds and pence preceeded by "£" and separated by "." to give "£3.99"
+

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

@@ -16,6 +16,19 @@
 
 function getAngleType(angle) {
   // TODO: Implement this function
+  if (angle >= 0 && 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 > 180 && angle <= 360) {
+    return "Reflex angle";
+  } else {
+    return "Invalid angle";
+  }
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -35,3 +48,18 @@ function assertEquals(actualOutput, targetOutput) {
 // Example: Identify Right Angles
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+
+const acute = getAngleType(70);
+assertEquals(acute, "Acute angle");
+
+const obtuse = getAngleType(140);
+assertEquals(obtuse, "Obtuse angle");
+
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+
+const reflex = getAngleType(190);
+assertEquals(reflex, "Reflex angle");
+
+const invalid = getAngleType(370);
+assertEquals(invalid, "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 (numerator < denominator) {
+    return "true";
+  } else {
+    return "false";
+  }
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +36,7 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+
+assertEquals(isProperFraction(1, 2), "true");
+assertEquals(isProperFraction(2, 2), "false");
+assertEquals(isProperFraction(7, 4), "false");

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

@@ -23,6 +23,16 @@
 
 function getCardValue(card) {
   // TODO: Implement this function
+  rankCard = card.slice(0, 1);
+  if (rankCard === "A") {
+    return 11;
+  } else if (rankCard === "J" || rankCard === "Q" || rankCard === "K") {
+    return 10;
+  } else if (+rankCard >= 2 && +rankCard <= 10) {
+    return +rankCard;
+  } else {
+    return rankCard.toThrow();
+  }
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -46,9 +56,7 @@ try {
   getCardValue("invalid");
 
   // This line will not be reached if an error is thrown as expected
-  console.error("Error was not thrown for invalid card 😢");
-} catch (e) {
-  console.log("Error thrown for invalid card 🎉");
-}
+  console.error("Error was not thrown for invalid card");
+} catch (e) { }
 
-// What other invalid card cases can you think of?
+// What other invalid card cases can you think of? "13♠"

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

@@ -14,7 +14,31 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" when (angle === 90)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(90)).toEqual("Right angle");
+});
 // Case 3: Obtuse angles
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(145)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
 // Case 4: Straight angle
+test(`should return "Straight angle" when (angle === 180)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
 // Case 5: Reflex angles
+test(`should return "Reflex angle" when (180 < angle < 360)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(245)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
 // Case 6: Invalid angles
+test(`should return "Invalid angle" when (angle > 360)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(90)).toEqual("Invalid angle");
+});

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

@@ -8,3 +8,19 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+
+
+// Special case: positives
+test(`should return false when denominator is zero`, () => {
+  expect(isProperFraction(1, 7)).toEqual(false);
+});
+
+// Special case: negatives
+test(`should return false when denominator is zero`, () => {
+  expect(isProperFraction(1, -7)).toEqual(false);
+});
+
+// Special case: zero
+test(`should return false when denominator is zero`, () => {
+  expect(isProperFraction(10, 0)).toEqual(false);
+});

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

@@ -11,9 +11,34 @@ test(`Should return 11 when given an ace card`, () => {
 
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
+
+test("Should return 2–10 for their respective card values", () => {
+  const cards = ["2", "3", "4", "5", "6", "7", "8", "9", "10"];
+  cards.forEach(card => {
+    expect(getCardValue(card)).toEqual(Number(card));
+  });
+});
+
 //   Face Cards (J, Q, K)
+test("Should return 2–10 for their respective card values", () => {
+  const cards = ["J", "Q", "K"];
+  cards.forEach(card => {
+    expect(getCardValue(card)).toEqual(10);
+  });
+});
+
 //   Invalid Cards
 
+test("Should return invalid for their respective card values", () => {
+  const cards = ["L", "M", "N"];
+  cards.forEach(card => {
+    expect(getCardValue(card)).toEqual(Number("Invalid"));
+
+  });
+});
+
+
+
 // 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