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code-server/test/utils/helpers.ts
2021-07-26 11:21:30 -07:00

64 lines
1.8 KiB
TypeScript

import { promises as fs } from "fs"
import * as os from "os"
import * as path from "path"
/**
* Return a mock of @coder/logger.
*/
export function createLoggerMock() {
return {
field: jest.fn(),
level: 2,
logger: {
debug: jest.fn(),
error: jest.fn(),
info: jest.fn(),
trace: jest.fn(),
warn: jest.fn(),
},
}
}
/**
* Clean up directories left by a test. It is recommended to do this when a test
* starts to avoid potentially accumulating infinite test directories.
*/
export async function clean(testName: string): Promise<void> {
const dir = path.join(os.tmpdir(), `code-server/tests/${testName}`)
await fs.rmdir(dir, { recursive: true })
}
/**
* Create a uniquely named temporary directory for a test.
*/
export async function tmpdir(testName: string): Promise<string> {
const dir = path.join(os.tmpdir(), `code-server/tests/${testName}`)
await fs.mkdir(dir, { recursive: true })
return await fs.mkdtemp(path.join(dir, `${testName}-`), { encoding: "utf8" })
}
/**
* @description Helper function to use an environment variable.
*
* @returns an array (similar to useState in React) with a function
* to set the value and reset the value
*/
export function useEnv(key: string): [(nextValue: string | undefined) => string | undefined, () => void] {
const initialValue = process.env[key]
const setValue = (nextValue: string | undefined) => (process.env[key] = nextValue)
// Node automatically converts undefined to string 'undefined'
// when assigning an environment variable.
// which is why we need to delete it if it's supposed to be undefined
// Source: https://stackoverflow.com/a/60147167
const resetValue = () => {
if (initialValue !== undefined) {
process.env[key] = initialValue
} else {
delete process.env[key]
}
}
return [setValue, resetValue]
}