mirror of
https://github.com/josdejong/mathjs.git
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93 lines
3.9 KiB
JavaScript
93 lines
3.9 KiB
JavaScript
var assert = require('assert'),
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math = require('../../../index.js'),
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subset = math.subset,
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matrix = math.matrix,
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range = math.range,
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index = math.index;
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describe('subset', function() {
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var a = [[1,2], [3,4]];
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var b = math.matrix(a);
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it('should get the right subset of an array', function() {
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assert.deepEqual(subset(a, index([0,2], 1)), [[2],[4]]);
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assert.deepEqual(subset(a, index(1,0)), 3);
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});
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it('should throw an error if trying to access an invalid subset of an array', function() {
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assert.throws(function () {subset(a, index(6, 0))}, RangeError);
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assert.throws(function () {subset(a, index(1))}, RangeError);
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assert.throws(function () {subset(a, index(1,0,0))}, RangeError);
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assert.throws(function () {subset(a, index(1.3, 0))}, TypeError);
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});
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it('should get the right subset of a matrix', function() {
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assert.deepEqual(subset(b, index([0,2], 1)), matrix([[2],[4]]));
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assert.deepEqual(subset(b, index(1, 0)), 3);
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});
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it('should throw an error if trying to access an invalid subset of a matrix', function() {
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assert.throws(function () {subset(b, index(6, 0))}, RangeError);
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assert.throws(function () {subset(b, index(1))}, RangeError);
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assert.throws(function () {subset(b, index(1,0,0))}, RangeError);
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assert.throws(function () {subset(b, index(1.3, 0))}, TypeError);
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});
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it('should get the right subset of a string', function() {
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assert.deepEqual(subset('hello', index(1)), 'e');
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assert.deepEqual(subset('hello', index([4,-1,-1])), 'olleh');
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});
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it('should throw an error if trying to access an invalid subset of a string', function() {
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assert.throws(function () {subset('hello', 1)}, TypeError);
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assert.throws(function () {subset('hello', index([6]))}, SyntaxError);
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assert.throws(function () {subset('hello', index([-2]))}, SyntaxError);
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assert.throws(function () {subset('hello', index([1.3]))}, TypeError);
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});
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var d = [[1,2], [3,4]];
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var g = matrix([[1,2], [3,4]]);
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it('should set the right subset of an array', function() {
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assert.deepEqual(d, [[1,2], [3,4]]);
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assert.deepEqual(subset(d, index([0,2], 1), [[-2],[-4]]), [[1,-2], [3,-4]]);
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assert.deepEqual(d, [[1,2], [3,4]]);
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assert.deepEqual(subset(d, index(2, [0,2]), [[5,6]]), [[1,2], [3,4], [5,6]]);
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assert.deepEqual(d, [[1,2], [3,4]]);
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assert.deepEqual(subset(d, index(0,0), 123), [[123,2], [3,4]]);
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});
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it('should throw an error if setting the subset of an array with an invalid replacement', function() {
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assert.throws(function () {subset(d, index(1), 123)}, RangeError);
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assert.throws(function () {subset(d, index(1.3,0), 123)}, TypeError);
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});
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it('should set the right subset of a matrix', function() {
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assert.deepEqual(g, matrix([[1,2], [3,4]]));
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assert.deepEqual(subset(g, index([0,2], 1), [[-2],[-4]]), matrix([[1,-2], [3,-4]]));
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assert.deepEqual(g, matrix([[1,2], [3,4]]));
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assert.deepEqual(subset(g, index(2, [0,2]), [[5,6]]), matrix([[1,2], [3,4], [5,6]]));
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});
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it('should throw an error if setting the subset of a matrix with an invalid replacement', function() {
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assert.throws(function () {subset(d, index(1), 123)}, RangeError);
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assert.throws(function () {subset(d, index(1.3,0), 123)}, TypeError);
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});
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it('should set the right subset of a string', function() {
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var j = 'hello';
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assert.deepEqual(subset(j, index(0), 'H'), 'Hello');
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assert.deepEqual(j, 'hello');
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assert.deepEqual(subset(j, index(5), '!'), 'hello!');
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assert.deepEqual(j, 'hello');
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assert.deepEqual(subset(j, index([5,11]), ' world'), 'hello world');
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assert.deepEqual(j, 'hello');
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});
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it('should throw an error if setting the subset of a string with an invalid replacement', function() {
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assert.throws(function () {subset('hello', index([1,2]), '1234')}, RangeError);
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assert.throws(function () {subset('hello', index(1,2), 'a')}, RangeError);
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});
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}); |