mreichelt / robolectric-appstart-leak-sample

Sample to show memory leak in Robolectric when testing app startup

Robolectric memory leak when calling multiple app startups

1. Run ./gradlew test (or run unit tests in the IDE)
2. Test pass ✅
3. But: notice in stdout that the memory is always increasing, and resources are not released:

Used heap Size = 46.65666961669922 MB
Used heap Size = 81.19964599609375 MB
Used heap Size = 108.21515655517578 MB
Called loadFromPath(/system/framework/framework-res.apk, true); mode=binary sdk=28
Used heap Size = 156.23092651367188 MB
Called loadFromPath(/system/framework/framework-res.apk, true); mode=binary sdk=29
Used heap Size = 207.0097427368164 MB
Used heap Size = 262.7805938720703 MB
Used heap Size = 322.60746002197266 MB
Used heap Size = 382.8641891479492 MB
Used heap Size = 447.7919006347656 MB

See picture:

How to analyze Heap Dump

1. Download leak_robo_appstart.hprof.7z
2. Decompress it
3. Analyze it with a tool of your choice, e.g. VisualVM