// test larger
var assert = require('assert'),
    math = require('../../../src/index.js'),
    complex = math.complex,
    matrix = math.matrix,
    unit = math.unit,
    larger = math.larger;

describe('larger', function() {

  it('should be parsed correctly', function() {
    assert.equal(math.eval('2 > 3'), false);
    assert.equal(math.eval('2 > 2'), false);
    assert.equal(math.eval('2 > 1'), true);
    assert.equal(math.eval('larger(2, 3)'), false);
    assert.equal(math.eval('larger(2, 2)'), false);
    assert.equal(math.eval('larger(2, 1)'), true);
  });

  it('should compare two numbers correctly', function() {
    assert.equal(larger(2, 3), false);
    assert.equal(larger(2, 2), false);
    assert.equal(larger(2, 1), true);
    assert.equal(larger(0, 0), false);
    assert.equal(larger(-2, 2), false);
    assert.equal(larger(-2, -3), true);
    assert.equal(larger(-3, -2), false);
  });

  it('should compare two complex numbers correctly', function() {
    assert.equal(larger(complex(1,1), complex(1,2)), false);
    assert.equal(larger(complex(1,1), complex(1,1)), false);
    assert.equal(larger(complex(1,1), complex(2,1)), false);
    assert.equal(larger(complex(1,6), complex(7,1)), false);
    assert.equal(larger(complex(4,1), complex(2,2)), true);
    assert.equal(larger(complex(2,0), 3), false);
    assert.equal(larger(complex(2,0), 2), false);
    assert.equal(larger(complex(2,0), 1), true);
    assert.equal(larger(3, complex(2,0)), true);
    assert.equal(larger(2, complex(2,0)), false);
    assert.equal(larger(1, complex(2,0)), false);
  });

  it('should add two measures of the same unit', function() {
    assert.equal(larger(unit('100cm'), unit('10inch')), true);
    assert.equal(larger(unit('99cm'), unit('1m')), false);
    //assert.equal(larger(unit('100cm'), unit('1m')), false); // dangerous, round-off errors
    assert.equal(larger(unit('101cm'), unit('1m')), true);
  });

  it('should throw an error if comparing a unit with a number', function() {
    assert.throws(function () {larger(unit('100cm'), 22)});
  });

  it('should perform lexical comparison for two strings', function() {
    assert.equal(larger('0', 0), false);

    assert.equal(larger('abd', 'abc'), true);
    assert.equal(larger('abc', 'abc'), false);
    assert.equal(larger('abc', 'abd'), false);
  });

  it('should perform element-wise comparison for two matrices of same size', function() {
    assert.deepEqual(larger([1,4,6], [3,4,5]), [false, false, true]);
    assert.deepEqual(larger([1,4,6], matrix([3,4,5])), matrix([false, false, true]));
  });

  it('should throw an error if matrices are different sizes', function() {
    assert.throws(function () {larger([1,4,6], [3,4])});
  });

});