node-query/test/helpers_test.js

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'use strict';
let chai = require('chai'),
assert = chai.assert,
expect = chai.expect,
should = chai.should();
let helpers = require('../lib/helpers');
suite('Helper Module Tests', () => {
suite('Type-checking methods', () => {
suite('Object wrappers are listed as their native type', () => {
test("Boolean Wrapper returns 'boolean' not 'object'", () => {
let item = Boolean(true);
expect(helpers.type(item)).to.deep.equal('boolean');
});
test("Number Wrapper returns 'number' not 'object", () => {
let item = Number(4867);
expect(helpers.type(item)).to.deep.equal('number');
});
test("String Wrapper returns 'string' not 'object'", () => {
let item = String("Foo");
expect(helpers.type(item)).to.deep.equal('string');
});
});
suite('is..Method methods exist', () => {
let types = ['Null','Undefined','Object','Array','String','Number','Boolean','Function','RegExp','NaN','Infinite'];
types.forEach(type => {
test(`is${type} method exists`, () => {
assert.ok(helpers[`is${type}`]);
});
});
});
suite('isScalar', () => {
let trueCases = {
'Strings are scalar': 'foo',
'Booleans are scalar': true,
'Numbers are scalar': 545
};
Object.keys(trueCases).forEach(desc => {
test(desc, () => {
expect(helpers.isScalar(trueCases[desc])).to.be.true;
});
});
let falseCases = {
'Arrays are not scalar': [],
'Objects are not scalar': [],
};
Object.keys(falseCases).forEach(desc => {
test(desc, () => {
expect(helpers.isScalar(falseCases[desc])).to.be.false;
});
});
});
suite('isInfinity', () => {
test('The type of 1/0 is infinity', () => {
expect(helpers.type(1/0)).to.equal('infinity');
});
test('isInfinity is the same as isInfinite', () => {
expect(helpers.isInfinite(1/0)).to.be.true;
});
});
suite('isNaN', () => {
test('The type of 0 / 0 is NaN', () => {
expect(helpers.type(0 / 0)).to.equal('nan');
});
test('isNaN method agrees with type', () => {
expect(helpers.isNaN(0 / 0)).to.be.true;
});
});
});
suite('Other helper methods', () => {
suite('stringTrim', () => {
test('stringTrim method works as expected', () => {
let orig = [' x y ', 'z ', ' q'];
let ret = ['x y', 'z', 'q'];
expect(orig.map(helpers.stringTrim)).to.be.deep.equal(ret);
});
});
suite('arrayPluck', () => {
let orig = [{
foo: 1
},{
foo: 2,
bar: 10
},{
foo: 3,
bar: 15
}];
test('Finding members in all objects', () => {
expect(helpers.arrayPluck(orig, 'foo')).to.be.deep.equal([1,2,3]);
});
test('Some members are missing in some objects', () => {
expect(helpers.arrayPluck(orig, 'bar')).to.be.deep.equal([10, 15]);
});
test('Empty case', () => {
expect(helpers.arrayPluck([], 'apple')).to.be.deep.equal([]);
});
});
suite('regexInArray', () => {
let orig = ['apple', ' string ', 6, 4, 7];
let cases = [{
'Dollar sign is not in any of the array items': /\$/,
'None of the numbers in the array match /5/': /5/
},{
"' string ' matches /^ ?string/": /^ ?string/,
"'apple' matches /APPLE/i": /APPLE/i
}];
[0, 1].forEach(i => {
let boolCase = cases[i];
Object.keys(boolCase).forEach(desc => {
test(desc, () => {
if (i) {
expect(helpers.regexInArray(orig, boolCase[desc])).to.be.true;
} else {
expect(helpers.regexInArray(orig, boolCase[desc])).to.be.false;
}
});
});
});
test('First argument is not an array', () => {
expect(helpers.regexInArray(5, /5/)).to.be.false;
});
test('Array is empty', () => {
expect(helpers.regexInArray([], /.*/)).to.be.false;
});
});
});
});