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 > 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 'Stright angle';
  }
  else if (angle > 180 && angle < 360) {
    return 'Reflex angle';
  }
  else {return 'Invalid angle';}

  // TODO: Implement this function
}

// 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");
assertEquals (getAngleType(90), "Right angle");

// const acute = getAngleType(45);
// assertEquals(acute, "Acute angle");
assertEquals (getAngleType(45),"Acute angle");

// const obtuse = getAngleType(120);
// assertEquals(obtuse, "Obtuse angle");
assertEquals (getAngleType(120),"Obtuse angle");

// const stright = getAngleType(180);
// assertEquals(stright, "Stright angle");
assertEquals (getAngleType(180),"Stright angle");
// const reflex = getAngleType(270);
// assertEquals(reflex, "Reflex angle");
assertEquals (getAngleType(270),"Reflex angle");

// const invalid = getAngleType(360);
// assertEquals(invalid, "Invalid angle");
assertEquals (getAngleType(360),"Invalid angle");
//Boundary cases
//  const invalid = getAngleType(0);
// assertEquals(invalid, "Invalid angle");
assertEquals (getAngleType(0),"Invalid angle");
//Outside range 
// const invalid = getAngleType(-10 , 400);
// assertEquals(invalid, "Invalid angle");
assertEquals (getAngleType(-10 , 400),"Invalid angle");