1-get-angle-type.js

// Implement a function getAngleType
//
// When given an angle in degrees, it should return a string indicating the type of angle:
// - "Acute angle" for angles greater than 0° and less than 90°
// - "Right angle" for exactly 90°
// - "Obtuse angle" for angles greater than 90° and less than 180°
// - "Straight angle" for exactly 180°
// - "Reflex angle" for angles greater than 180° and less than 360°
// - "Invalid angle" for angles outside the valid range.

// Assumption: The parameter is a valid number. (You do not need to handle non-numeric inputs.)

// Acceptance criteria:
// After you have implemented the function, write tests to cover all the cases, and
// execute the code to ensure all tests pass.

function getAngleType(angle) {
   if (angle === 90) return "Right angle";
   if (angle < 90) return "Acute angle";
   if (90 <angle && angle<180 ) return "Obtuse angle";
   if (angle === 180) return "Straight angle";
   if (180<angle && 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) {
  console.assert(
    actualOutput === targetOutput,
    `Expected ${actualOutput} to equal ${targetOutput}`
  );
}

// TODO: Write tests to cover all cases, including boundary and invalid cases.
// Example: Identify Right Angles
const right = getAngleType(90);
assertEquals(right, "Right angle");

// Case 2: Identify Acute Angles:
const acute = getAngleType(45);
assertEquals(acute, "Acute angle");

// Case 3: Identify Obtuse Angles:
const obtuse = getAngleType(120);
assertEquals(obtuse, "Obtuse angle");

// Case 4: Identify Straight Angles:
const straight = getAngleType(180);
assertEquals(straight, "Straight angle");

// Case 5: Identify Reflex Angles:
const reflex = getAngleType(300);
assertEquals(reflex, "Reflex angle");

//case 6: Identify Invalid angle:
assertEquals(getAngleType(367),"Invalid angle");

//case 7: Identify boundary angle:
assertEquals(getAngleType(1), "Acute angle");