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29 lines
878 B
JavaScript
29 lines
878 B
JavaScript
var assert = require('assert');
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var math = require('../../../index.js');
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describe('re', function() {
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it('should return the real part of a complex number', function() {
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assert.equal(math.re(math.complex(2,3)), 2);
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assert.equal(math.re(math.complex(-2,-3)), -2);
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assert.equal(math.re(math.i), 0);
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});
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it('should be the identity for a real number', function() {
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assert.equal(math.re(2), 2);
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});
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it('should be the identity for a string', function() {
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assert.equal(math.re('string'), 'string');
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});
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it('should be the identity for a boolean', function() {
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assert.equal(math.re(true), true);
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});
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it('should return the real part for each element in a matrix', function() {
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assert.deepEqual(math.re([2, math.complex('3-6i')]), [2, 3]);
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assert.deepEqual(math.re(math.matrix([2, math.complex('3-6i')])).valueOf(), [2, 3]);
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});
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}); |