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adapter/src/api/viya/spec/writeStream.spec.ts
2022-06-20 19:48:42 +03:00

36 lines
991 B
TypeScript

import { WriteStream } from '../../../types'
import { writeStream } from '../writeStream'
import {
createWriteStream,
fileExists,
readFile,
deleteFile
} from '@sasjs/utils'
describe('writeStream', () => {
const filename = 'test.txt'
const content = 'test'
let stream: WriteStream
beforeAll(async () => {
stream = await createWriteStream(filename)
})
it('should resolve when the stream is written successfully', async () => {
await expect(writeStream(stream, content)).toResolve()
await expect(fileExists(filename)).resolves.toEqual(true)
await expect(readFile(filename)).resolves.toEqual(content + '\n')
await deleteFile(filename)
})
it('should reject when the write errors out', async () => {
jest
.spyOn(stream, 'write')
.mockImplementation((_, callback) => callback(new Error('Test Error')))
const error = await writeStream(stream, content).catch((e: any) => e)
expect(error.message).toEqual('Test Error')
})
})