Current File : //home/forge/takeaseat.eco-n-tech.co.uk/node_modules/@nodelib/fs.walk/src/providers/stream.spec.ts
import * as assert from 'assert';
import { Readable } from 'stream';
import * as sinon from 'sinon';
import AsyncReader from '../readers/async';
import Settings from '../settings';
import * as tests from '../tests';
import StreamProvider from './stream';
class TestProvider extends StreamProvider {
protected readonly _reader: AsyncReader = new tests.TestAsyncReader() as unknown as AsyncReader;
constructor(_root: string, _settings: Settings = new Settings()) {
super(_root, _settings);
this._stream.emit = sinon.stub();
this._stream.push = sinon.stub();
}
public get reader(): tests.TestAsyncReader {
return this._reader as unknown as tests.TestAsyncReader;
}
public get stream(): sinon.SinonStubbedInstance<Readable> {
return this._stream as unknown as sinon.SinonStubbedInstance<Readable>;
}
}
describe('Providers → Stream', () => {
describe('.read', () => {
it('should return stream', () => {
const provider = new TestProvider('directory');
const stream = provider.read();
assert.ok(stream instanceof Readable);
});
it('should call reader function with correct set of arguments', () => {
const provider = new TestProvider('directory');
provider.read();
assert.ok(provider.reader.read.called);
});
it('should re-emit the "error" event from reader', () => {
const provider = new TestProvider('directory');
provider.reader.onError.yields(tests.EPERM_ERRNO);
provider.read();
assert.deepStrictEqual(provider.stream.emit.args, [['error', tests.EPERM_ERRNO]]);
});
it('should call the "push" method with entry value for the "entry" event from reader', () => {
const provider = new TestProvider('directory');
const fakeEntry = tests.buildFakeFileEntry();
provider.reader.onEntry.yields(fakeEntry);
provider.read();
assert.deepStrictEqual(provider.stream.push.args, [[fakeEntry]]);
});
it('should call the "push" method with "null" value for the "end" event from reader', () => {
const provider = new TestProvider('directory');
provider.reader.onEnd.yields();
provider.read();
assert.deepStrictEqual(provider.stream.push.args, [[null]]);
});
it('should do not destroy reader when it is already destroyed', () => {
const provider = new TestProvider('directory');
const stream = provider.read();
stream.destroy();
assert.ok(stream.destroyed);
assert.doesNotThrow(() => stream.destroy());
});
});
});
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