google-auth-library leaks memory when it is imported

[pvatterott]

Whenever google-auth-library is imported in our codebase, our test suites start crashing with FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory

I was able to isolate this to an issue with a downstream dependency, agent-base, which has an open issue: TooTallNate/node-agent-base#22

Environment details

• OS: Ubuntu 18.04.1
• Node.js version: 10.13.0
• npm version: yarn 1.7.0
• google-auth-library version: 2.0.0

Steps to reproduce

You can reproduce using jest --detectLeaks, like in the linked issue:

const auth = require("google-auth-library");

describe("google-auth-library", () => {
    it(`should not leak`, async () => {
        expect(auth).toBeTruthy();
    });
});

jest --detectLeaks
tests/auth-library.spec.ts
  ● Test suite failed to run

    EXPERIMENTAL FEATURE!
    Your test suite is leaking memory. Please ensure all references are cleaned.

    There is a number of things that can leak memory:
      - Async operations that have not finished (e.g. fs.readFile).
      - Timers not properly mocked (e.g. setInterval, setTimeout).
      - Keeping references to the global scope.

      at node_modules/jest-cli/build/TestScheduler.js:275:22

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        0.653s

[JustinBeckwith]

Greetings! We now load https-proxy-agent only when you're specifically asking for a proxy. Unless you're doing that, hopefully this isn't a problem :)

[pvatterott]

Great! That's perfect, thanks for the help