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Merge pull request #3846 from cdr/jsjoeio-test-should-enable-proxy

feat: add tests for shouldEnableProxy
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Joe Previte 2021-07-26 11:38:09 -07:00 committed by GitHub
commit 6d928a0666
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4 changed files with 92 additions and 2 deletions

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@ -62,7 +62,7 @@ function newProxyAgent(inVSCode: boolean): http.Agent {
// If they have $NO_PROXY set to example.com then this check won't work!
// But that's drastically unlikely.
function shouldEnableProxy(): boolean {
export function shouldEnableProxy(): boolean {
let shouldEnable = false
const httpProxy = proxyFromEnv.getProxyForUrl(`http://example.com`)

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@ -1,5 +1,5 @@
import { promises as fs } from "fs"
import { tmpdir } from "../../test/utils/helpers"
import { tmpdir, useEnv } from "../../test/utils/helpers"
/**
* This file is for testing test helpers (not core code).
@ -12,3 +12,30 @@ describe("test helpers", () => {
expect(fs.access(pathToTempDir)).resolves.toStrictEqual(undefined)
})
})
describe("useEnv", () => {
beforeAll(() => {
jest.resetModules()
process.env.TEST_USE_ENV = "test environment variable"
})
afterAll(() => {
delete process.env.TEST_USE_ENV
})
it("should set and reset the env var", () => {
const envKey = "TEST_ENV_VAR"
const [setValue, resetValue] = useEnv(envKey)
setValue("hello-world")
expect(process.env[envKey]).toEqual("hello-world")
resetValue()
expect(process.env[envKey]).toEqual(undefined)
})
it("should set and reset the env var where a value was already set", () => {
const envKey = "TEST_USE_ENV"
expect(process.env[envKey]).toEqual("test environment variable")
const [setValue, resetValue] = useEnv(envKey)
setValue("hello there")
expect(process.env[envKey]).toEqual("hello there")
resetValue()
expect(process.env[envKey]).toEqual("test environment variable")
})
})

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@ -0,0 +1,39 @@
import { shouldEnableProxy } from "../../../src/node/proxy_agent"
import { useEnv } from "../../utils/helpers"
describe("shouldEnableProxy", () => {
const [setHTTPProxy, resetHTTPProxy] = useEnv("HTTP_PROXY")
const [setHTTPSProxy, resetHTTPSProxy] = useEnv("HTTPS_PROXY")
const [setNoProxy, resetNoProxy] = useEnv("NO_PROXY")
beforeEach(() => {
jest.resetModules() // Most important - it clears the cache
resetHTTPProxy()
resetNoProxy()
resetHTTPSProxy()
})
it("returns true when HTTP_PROXY is set", () => {
setHTTPProxy("http://proxy.example.com")
expect(shouldEnableProxy()).toBe(true)
})
it("returns true when HTTPS_PROXY is set", () => {
setHTTPSProxy("https://proxy.example.com")
expect(shouldEnableProxy()).toBe(true)
})
it("returns false when NO_PROXY is set", () => {
setNoProxy("*")
expect(shouldEnableProxy()).toBe(false)
})
it("should return false when neither HTTP_PROXY nor HTTPS_PROXY is set", () => {
expect(shouldEnableProxy()).toBe(false)
})
it("should return false when NO_PROXY is set to https://example.com", () => {
setNoProxy("https://example.com")
expect(shouldEnableProxy()).toBe(false)
})
it("should return false when NO_PROXY is set to http://example.com", () => {
setNoProxy("http://example.com")
expect(shouldEnableProxy()).toBe(false)
})
})

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@ -37,3 +37,27 @@ export async function tmpdir(testName: string): Promise<string> {
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]
}