One step to speed up testing cycle based on code diff. For multiple languages.

squ is a simple enough tool to squeeze your test suites and speed up testing cycle based on code diff.

Before vs After

Before: I have to run all the cases for even a tiny change, which takes 40 minutes. Which means 0.32 USD per push.

$ pytest --collect-only
============================= test session starts ==============================
platform darwin -- Python 3.7.4, pytest-7.2.2, pluggy-0.12.0
rootdir: /Users/fengzhangchi/github_workspace/stagesepx
plugins: cov-2.7.1
collected 45 items

...

========================= 45 tests collected in 15.30s =========================

After: Only need to run the influenced cases.

$ ./squ | xargs pytest --collect-only
============================= test session starts ==============================
platform darwin -- Python 3.7.4, pytest-7.2.2, pluggy-0.12.0
plugins: cov-2.7.1
collected 5 items

...

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
========================= 5 tests collected in 14.93s ==========================

All you need is simply adding the ./squ | xargs prefix.

Usage

Language	Before	After
Python	pytest	squ | xargs pytest
Java	mvn test	squ | xargs mvn test
Golang	go test	squ | xargs go test

But brings much benefits:

Repo	Language	Analyze time	Before Cases	After Cases	Optimize
stagesepx (our own case)	Python	~1 s	45	0~15	~75%
Jacoco	Java	~7 s	1364	0~983	~50%
sibyl2	Golang	~1 s	53	0~20	~70%

See https://github.com/opensibyl/squ for details!