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35 lines
1.3 KiB
JavaScript
35 lines
1.3 KiB
JavaScript
// test index construction
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var assert = require('assert'),
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error = require('../../../lib/error/index'),
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math = require('../../../index');
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describe('index', function() {
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it('should create an index', function() {
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var index = math.index([2,6]);
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assert.ok(index instanceof math.type.Index);
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assert.deepEqual(index._ranges, [{start:2, end:6, step:1}]);
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var index2 = math.index([0,4], [5,2,-1]);
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assert.ok(index2 instanceof math.type.Index);
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assert.deepEqual(index2._ranges, [{start:0, end:4, step: 1}, {start:5, end: 2, step:-1}]);
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});
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it('should create an index from bignumbers (downgrades to numbers)', function() {
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var index = math.index([math.bignumber(2), math.bignumber(6)], math.bignumber(3));
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assert.ok(index instanceof math.type.Index);
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assert.deepEqual(index._ranges, [{start:2, end:6, step:1}, {start: 3, end: 4, step: 1}]);
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});
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it('should LaTeX index', function () {
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var expr1 = math.parse('index(1)');
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var expr2 = math.parse('index(1,2)');
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var expr3 = math.parse('index(1,2,3)');
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assert.equal(expr1.toTex(), '\\mathrm{index}\\left(1\\right)');
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assert.equal(expr2.toTex(), '\\mathrm{index}\\left(1,2\\right)');
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assert.equal(expr3.toTex(), '\\mathrm{index}\\left(1,2,3\\right)');
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});
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});
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