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75 lines
3.5 KiB
JavaScript
75 lines
3.5 KiB
JavaScript
// test divide
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var assert = require('assert');
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math = require('../../../math.js'),
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approx = require('../../../tools/approx.js'),
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divide = math.divide,
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complex = math.complex;
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// parser
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assert.equal(math.eval('4 / 2'), 2);
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assert.equal(math.eval('8 / 2 / 2'), 2);
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assert.equal(math.eval('divide(4, 2)'), 2);
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// number
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assert.equal(divide(4, 2), 2);
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assert.equal(divide(-4, 2), -2);
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assert.equal(divide(4, -2), -2);
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assert.equal(divide(-4, -2), 2);
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assert.equal(divide(4, 0), Infinity);
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assert.equal(divide(0, -5), 0);
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assert.ok(isNaN(divide(0, 0)));
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// wrong arguments
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assert.throws(function () {divide(2,3,4); });
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assert.throws(function () {divide(2); });
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// complex
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assert.deepEqual(divide(complex('2+3i'), 2), complex('1+1.5i'));
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assert.deepEqual(divide(complex('2+3i'), complex('4i')), complex('0.75 - 0.5i'));
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assert.deepEqual(divide(complex('2i'), complex('4i')), complex('0.5'));
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assert.deepEqual(divide(4, complex('1+2i')), complex('0.8 - 1.6i'));
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approx.deepEqual(divide(complex(2, 3), complex(4, 5)), complex('0.5609756097560976 + 0.0487804878048781i'));
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approx.deepEqual(divide(complex(2, 3), complex(4, -5)), complex('-0.170731707317073 + 0.536585365853659i'));
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approx.deepEqual(divide(complex(2, 3), complex(-4, 5)), complex('0.170731707317073 - 0.536585365853659i'));
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approx.deepEqual(divide(complex(2, 3), complex(-4, -5)), complex('-0.5609756097560976 - 0.0487804878048781i'));
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approx.deepEqual(divide(complex(2, -3), complex(4, 5)), complex('-0.170731707317073 - 0.536585365853659i'));
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approx.deepEqual(divide(complex(2, -3), complex(4, -5)), complex('0.5609756097560976 - 0.0487804878048781i'));
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approx.deepEqual(divide(complex(2, -3), complex(-4, 5)), complex('-0.5609756097560976 + 0.0487804878048781i'));
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approx.deepEqual(divide(complex(2, -3), complex(-4, -5)), complex('0.170731707317073 + 0.536585365853659i'));
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approx.deepEqual(divide(complex(-2, 3), complex(4, 5)), complex('0.170731707317073 + 0.536585365853659i'));
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approx.deepEqual(divide(complex(-2, 3), complex(4, -5)), complex('-0.5609756097560976 + 0.0487804878048781i'));
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approx.deepEqual(divide(complex(-2, 3), complex(-4, 5)), complex('0.5609756097560976 - 0.0487804878048781i'));
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approx.deepEqual(divide(complex(-2, 3), complex(-4, -5)), complex('-0.170731707317073 - 0.536585365853659i'));
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approx.deepEqual(divide(complex(-2, -3), complex(4, 5)), complex('-0.5609756097560976 - 0.0487804878048781i'));
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approx.deepEqual(divide(complex(-2, -3), complex(4, -5)), complex('0.170731707317073 - 0.536585365853659i'));
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approx.deepEqual(divide(complex(-2, -3), complex(-4, 5)), complex('-0.170731707317073 + 0.536585365853659i'));
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approx.deepEqual(divide(complex(-2, -3), complex(-4, -5)), complex('0.5609756097560976 + 0.0487804878048781i'));
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// unit
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assert.equal(divide(math.unit('5 m'), 10).toString(), '500 mm');
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assert.throws(function () {divide(10, math.unit('5 m')).toString()});
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// matrix, array, range
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assert.deepEqual(divide(math.range(2,2,6), 2), [1,2,3]);
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a = math.matrix([[1,2],[3,4]]);
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assert.deepEqual(divide(a, 2), math.matrix([[0.5,1],[1.5,2]]));
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assert.deepEqual(divide(a.valueOf(), 2), [[0.5,1],[1.5,2]]);
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assert.deepEqual(divide([], 2), []);
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assert.deepEqual(divide([], 2), []);
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assert.deepEqual(math.format(divide(1, [
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[ 1, 4, 7],
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[ 3, 0, 5],
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[-1, 9, 11]
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])), math.format([
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[ 5.625, -2.375, -2.5],
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[ 4.75, -2.25, -2],
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[-3.375, 1.625, 1.5]
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]));
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a = math.matrix([[1,2],[3,4]]);
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b = math.matrix([[5,6],[7,8]]);
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assert.deepEqual(divide(a, b), math.matrix([[3,-2], [2,-1]]));
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assert.throws(function () {divide(a, [[1]])});
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