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Add is.nodeStream() (#34)

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Brandon Smith 2017-11-19 15:16:06 -05:00 • committed by Sindre Sorhus
parent ae3adc9818
commit a04a04c131
4 changed files with 38 additions and 1 deletions
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2
source/index.ts
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@ -238,6 +238,8 @@ namespace is { // tslint:disable-line:no-namespace
export const domElement = (value: any) => object(value) && value.nodeType === NODE_TYPE_ELEMENT && string(value.nodeName) &&
!plainObject(value) && DOM_PROPERTIES_TO_CHECK.every(property => property in value);
export const nodeStream = (value: any) => !nullOrUndefined(value) && isObject(value) && function_(value.pipe);
export const infinite = (value: any) => value === Infinity || value === -Infinity;
const isAbsoluteMod2 = (value: number) => (rem: number) => integer(rem) && Math.abs(rem % 2) === value;

25
source/tests/test.ts
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@ -1,4 +1,8 @@
import * as fs from 'fs';
import * as net from 'net';
import * as Stream from 'stream';
import * as util from 'util';
import * as tempy from 'tempy';
import test, {TestContext, Context} from 'ava';
import {jsdom} from 'jsdom';
import m from '..';
@ -286,7 +290,8 @@ const types = new Map<string, Test>([
'canvas',
'script'
].map(createDomElement) }
], ['non-domElements', {
],
['non-domElements', {
is: value => !m.domElement(value),
fixtures: [
document.createTextNode('data'),
@ -297,6 +302,20 @@ const types = new Map<string, Test>([
document.createDocumentFragment()
]
}],
['nodeStream', {
is: m.nodeStream,
fixtures: [
fs.createReadStream('readme.md'),
fs.createWriteStream(tempy.file()),
new net.Socket(),
new Stream.Duplex(),
new Stream.PassThrough(),
new Stream.Readable(),
new Stream.Transform(),
new Stream.Stream(),
new Stream.Writable()
]
}],
['infinite', {
is: m.infinite,
fixtures: [
@ -641,6 +660,10 @@ test('is.domElement', t => {
t.false(m.domElement({nodeType: 1, nodeName: 'div'}));
});
test('is.nodeStream', t => {
testType(t, 'nodeStream');
});
test('is.infinite', t => {
testType(t, 'infinite', ['number']);
});