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index.test.js
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index.test.js
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/* eslint-env jest */
const fs = require('fs')
const tmp = require('tmp')
const util = require('util')
const index = require('./index')
const spawn = require('./src/spawn')
const aliasGenerator = require('./src/alias-file-generator')
jest.unmock('child_process')
const access = util.promisify(fs.access)
let dirSyncSpy
beforeEach(() => {
dirSyncSpy = jest.spyOn(tmp, 'dirSync')
})
afterEach(() => {
dirSyncSpy.mockRestore()
})
describe('spawn', () => {
it('should remove the tempDir when spawnProcess throws', () => {
expect.assertions(1)
const spy = jest.spyOn(spawn, 'spawnProcess')
spy.mockImplementation(() => {
throw new Error()
})
const input = ['sh', ['./test-scripts/hello-world.sh']]
return index.spawnPromise(...input).catch(() => {
const tempDir = dirSyncSpy.mock.results[0].value.name
return access(tempDir, fs.constants.F_OK).catch(error => {
expect(error.code).toBe('ENOENT')
spy.mockRestore()
})
})
})
it('should remove the tempDir when createAliasFiles throws', () => {
expect.assertions(1)
const spy = jest.spyOn(aliasGenerator, 'createAliasFiles')
spy.mockImplementation(() => {
throw new Error()
})
const input = ['sh', ['./test-scripts/hello-world.sh']]
return index.spawnPromise(...input).catch(() => {
const tempDir = dirSyncSpy.mock.results[0].value.name
return access(tempDir, fs.constants.F_OK).catch(error => {
expect(error.code).toBe('ENOENT')
spy.mockRestore()
})
})
})
it('should throw if "node" is one of the mocks', () => {
const nodeMock = jest.fn()
const input = ['sh', ['./test-scripts/hello-world.sh'], {
mocks: {
node: nodeMock
}
}]
expect(nodeMock).not.toHaveBeenCalled()
expect(index.spawnPromise(...input)).rejects.toThrowErrorMatchingSnapshot()
})
it('should ignore IPC messages sent by the user', async () => {
expect.assertions(3)
const input = ['sh', ['./test-scripts/ipc-invader.sh']]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 0,
signal: '',
stderr: '',
stdout: `Hello World
`
})
expect(dirSyncSpy).toHaveBeenCalledTimes(1)
const tempDir = dirSyncSpy.mock.results[0].value.name
return access(tempDir, fs.constants.F_OK).catch(error => {
expect(error.code).toBe('ENOENT')
})
})
it('should set environment variables', async () => {
const input = [
'sh',
['./test-scripts/log-env.sh'],
{
env: {
AA: '_AA',
BB: '_BB',
CC: '_CC',
DD: '_DD'
}
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 0,
signal: '',
stderr: `_BB
_DD
`,
stdout: `_AA
_CC
`
})
})
it('should work when ignoring stdio', async () => {
const input = [
'sh',
['./test-scripts/hello-world.sh'],
{
stdio: ['ignore', 'ignore', 'ignore', 'ignore']
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 0,
signal: '',
stderr: '',
stdout: ''
})
})
it('should work when no mocks are provided', async () => {
expect.assertions(3)
const input = ['sh', ['./test-scripts/hello-world.sh']]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 0,
signal: '',
stderr: '',
stdout: `Hello World
`
})
expect(dirSyncSpy).toHaveBeenCalledTimes(1)
const tempDir = dirSyncSpy.mock.results[0].value.name
return access(tempDir, fs.constants.F_OK).catch(error => {
expect(error.code).toBe('ENOENT')
})
})
it('should pass a number as the argument', async () => {
const input = [
'sh',
['./test-scripts/exit-with-input.sh', 47]
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 47,
signal: '',
stderr: '',
stdout: ''
})
})
})
describe('spawn with mocks', () => {
it('should work when a mock is provided', async () => {
const ls = jest.fn(() => {
return {
code: 127,
stderr: 'MOCK_STDERR',
stdout: 'MOCK_STDOUT'
}
})
const input = [
'sh',
['./test-scripts/ls.sh'],
{
mocks: { ls }
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 127,
signal: '',
stderr: 'MOCK_STDERR',
stdout: 'MOCK_STDOUT'
})
})
it('should work when a mock and args are provided', async () => {
const mv = jest.fn((file1, file2) => {
return {
code: 12,
stderr: '',
stdout: ''
}
})
const args = ['./test-scripts/mv.sh', 'venus', 'pluto']
const input = [
'sh',
args,
{
mocks: { mv }
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 12,
signal: '',
stderr: '',
stdout: ''
})
expect(mv).toHaveBeenCalledTimes(1)
expect(mv).toHaveBeenCalledWith(...args.slice(1))
})
it('should work when returning a number from a mock', async () => {
const mv = jest.fn((file1, file2) => {
return 12
})
const args = ['./test-scripts/mv.sh', 'venus', 'pluto']
const input = [
'sh',
args,
{
mocks: { mv }
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 12,
signal: '',
stderr: '',
stdout: ''
})
expect(mv).toHaveBeenCalledTimes(1)
expect(mv).toHaveBeenCalledWith(...args.slice(1))
})
it('should work when returning a string from a mock', async () => {
const mv = jest.fn((file1, file2) => {
return 'MOCK_STDOUT'
})
const args = ['./test-scripts/mv.sh', 'venus', 'pluto']
const input = [
'sh',
args,
{
mocks: { mv }
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 0,
signal: '',
stderr: '',
stdout: 'MOCK_STDOUT'
})
expect(mv).toHaveBeenCalledTimes(1)
expect(mv).toHaveBeenCalledWith(...args.slice(1))
})
it('should call the ls mock several times', async () => {
const ls = jest.fn()
ls.mockImplementationOnce(() => {
return {
stdout: `quill
ignore
quip
ignore
`
}
})
ls.mockImplementationOnce(() => {
return {
stdout: `ignore
quibble
ignore
`
}
})
const input = [
'sh',
['./test-scripts/ls-then-grep.sh'],
{
mocks: { ls }
}
]
const data = await index.spawnPromise(...input)
expect(data).toEqual({
code: 0,
signal: '',
stderr: `quibble
`,
stdout: `quill
quip
`
})
})
})