mathjs/test/function/set/setSize.test.js

// test setSize
var assert = require('assert');
var math = require('../../../index');

describe('setSize', function () {
  it('should return the number of elements of a set', function () {
    assert.strictEqual(math.setSize([]), 0);
    assert.strictEqual(math.setSize([1]), 1);
    assert.strictEqual(math.setSize([1, 2]), 2);
    assert.strictEqual(math.setSize([1, math.complex(2,2)]), 2);
  });

  it('should return the number of elements of a multiset', function () {
    assert.strictEqual(math.setSize([1, 1]), 2);
    assert.strictEqual(math.setSize([1, 1], true), 1);
    assert.strictEqual(math.setSize([1, 2, 1], true), 2);
  });
  
  it('should return a number', function() {
	assert.equal(math.typeof(math.setSize([1, 2, 3])), 'number');
  });

  it('should throw an error in case of invalid type of arguments', function() {
    assert.throws(function () {math.setSize([], []);}, /TypeError: Unexpected type of argument/);
  });

  it('should throw an error in case of invalid number of arguments', function() {
    assert.throws(function () {math.setSize();}, /TypeError: Too few arguments/);
  });

});