120 lines
2.9 KiB
JavaScript
120 lines
2.9 KiB
JavaScript
const calculator = require('./calculator');
|
|
|
|
describe('add', () => {
|
|
test('adds 0 and 0', () => {
|
|
expect(calculator.add(0, 0)).toBe(0);
|
|
});
|
|
|
|
test.skip('adds 2 and 2', () => {
|
|
expect(calculator.add(2, 2)).toBe(4);
|
|
});
|
|
|
|
test.skip('adds positive numbers', () => {
|
|
expect(calculator.add(2, 6)).toBe(8);
|
|
});
|
|
|
|
// test.skip negative numbers
|
|
test.skip('adds negative numbers', () => {
|
|
expect(calculator.add(-5, -10)).toBe(-15);
|
|
});
|
|
|
|
// test.skip decimals
|
|
test.skip('adds decimals', () => {
|
|
expect(calculator.add(0.5, 1.5)).toBeCloseTo(2);
|
|
});
|
|
|
|
});
|
|
|
|
describe('subtract', () => {
|
|
test.skip('subtracts numbers', () => {
|
|
expect(calculator.subtract(10, 4)).toBe(6);
|
|
});
|
|
});
|
|
|
|
describe('sum', () => {
|
|
test.skip('computes the sum of an empty array', () => {
|
|
expect(calculator.sum([])).toBe(0);
|
|
});
|
|
|
|
test.skip('computes the sum of an array of one number', () => {
|
|
expect(calculator.sum([7])).toBe(7);
|
|
});
|
|
|
|
test.skip('computes the sum of an array of two numbers', () => {
|
|
expect(calculator.sum([7, 11])).toBe(18);
|
|
});
|
|
|
|
test.skip('computes the sum of an array of many numbers', () => {
|
|
expect(calculator.sum([1, 3, 5, 7, 9])).toBe(25);
|
|
});
|
|
|
|
// test subtracting negative number
|
|
test.skip('subtracts negative number', () => {
|
|
expect(calculator.subtract(10, -5)).toBe(15);
|
|
});
|
|
|
|
// test decimals
|
|
test.skip('subtracts decimals', () => {
|
|
expect(calculator.subtract(1.5, 0.5)).toBeCloseTo(1);
|
|
});
|
|
});
|
|
|
|
describe('multiply', () => {
|
|
test.skip('multiplies two numbers', () => {
|
|
expect(calculator.multiply([2, 4])).toBe(8);
|
|
});
|
|
|
|
test.skip('multiplies several numbers', () => {
|
|
expect(calculator.multiply([2, 4, 6, 8, 10, 12, 14])).toBe(645120);
|
|
});
|
|
|
|
// test 0
|
|
test.skip('multiplies by 0', () => {
|
|
expect(calculator.multiply([2, 0, 5])).toBe(0);
|
|
});
|
|
});
|
|
|
|
describe('power', () => {
|
|
test.skip('raises one number to the power of another number', () => {
|
|
expect(calculator.power(4, 3)).toBe(64); // 4 to third power is 64
|
|
});
|
|
|
|
|
|
// test power of 0
|
|
test.skip('0 to the power of anything is 0', () => {
|
|
expect(calculator.power(0, 5)).toBe(0);
|
|
});
|
|
});
|
|
|
|
describe('factorial', () => {
|
|
test.skip('computes the factorial of 0', () => {
|
|
expect(calculator.factorial(0)).toBe(1); // 0! = 1
|
|
});
|
|
|
|
test.skip('computes the factorial of 1', () => {
|
|
expect(calculator.factorial(1)).toBe(1);
|
|
});
|
|
|
|
test.skip('computes the factorial of 2', () => {
|
|
expect(calculator.factorial(2)).toBe(2);
|
|
});
|
|
|
|
test.skip('computes the factorial of 5', () => {
|
|
expect(calculator.factorial(5)).toBe(120);
|
|
});
|
|
|
|
test.skip('computes the factorial of 10', () => {
|
|
expect(calculator.factorial(10)).toBe(3628800);
|
|
});
|
|
|
|
// test non-integer
|
|
test.skip('throws error for non-integer', () => {
|
|
expect(() => calculator.factorial(1.5)).toThrow();
|
|
});
|
|
|
|
// test negative
|
|
test.skip('throws error for negative number', () => {
|
|
expect(() => calculator.factorial(-5)).toThrow();
|
|
});
|
|
});
|