Memory leak issue with jest #1817
Description
What is the expected behavior?
Node heap size shouldn't grow in every test.
What is the actual behavior?
Heap size increases after every test file.
With nock:
PASS test/function-86.js (22 MB heap size)
PASS test/function-75.js (22 MB heap size)
PASS test/function-1.js (22 MB heap size)
PASS test/function-43.js (26 MB heap size)
PASS test/function-24.js (26 MB heap size)
...
PASS test/function-48.js (133 MB heap size)
PASS test/function-82.js (137 MB heap size)
PASS test/function-87.js (137 MB heap size)
PASS test/function-20.js (137 MB heap size)
PASS test/function-79.js (140 MB heap size)
Test Suites: 100 passed, 100 total
Tests: 100 passed, 100 total
Snapshots: 0 total
Time: 25.506s, estimated 26s
Without nock:
PASS test/function-86.js (19 MB heap size)
PASS test/function-75.js (19 MB heap size)
PASS test/function-1.js (19 MB heap size)
PASS test/function-65.js (19 MB heap size)
PASS test/function-96.js (19 MB heap size)
...
PASS test/function-93.js (20 MB heap size)
PASS test/function-61.js (20 MB heap size)
PASS test/function-49.js (20 MB heap size)
PASS test/function-87.js (20 MB heap size)
PASS test/function-79.js (20 MB heap size)
Test Suites: 100 passed, 100 total
Tests: 100 passed, 100 total
Snapshots: 0 total
Time: 27.079s
How to reproduce the issue
Even a single require/import of nock seems to cause the issue.
Minimal test case: https://github.com/juhosuominen/jest-nock-memory-leak
Versions
| Software | Version(s) |
|---|---|
| Nock | 11.7.0 |
| Node | 11.15.0 |