AtCoder Unit Test

Name: AtCoder Unit Test
Rating: 5 (1 reviews)
Author: YujiSoftware

Generate unit tests from AtCoder's problem page.

As of May 2026, AtCoder Unit Test has 799 users and a 5.00/5 rating from 1 reviews in the Developer Tools category.

YujiSoftware Developer Tools★ Featured

Chrome Web Store ↗.crx

Users−3.3%

799

Rating0%

5.00

1 reviews

Reviews0%

Version

3.1.0

Manifest V3

History

3 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	826	5.00	1	3.1.0
Apr 30, 2026	814	5.00	1	3.1.0
May 29, 2026	838	5.00	1	3.1.0
Now	799	5.00	1	3.1.0

Permissions & access

Permissions: clipboardWritestorage
Host access: *://atcoder.jp/contests/*/tasks/*

Screenshots

About

This is an extension that generates unit tests from the AtCoder problem page.
1. Open the AtCoder problem page
2. Click the icon on the toolbar
3. "Paste" in any editor

Now you are ready to run your unit tests.
When you run a test, it sends example input to the program and checks the output.
All green is OK. Submit it!

Tips: Since the contents of standard output (stdout) are captured, when debugging printf, go to error output (stderr).

Supported languages: Python3 (unittest), Java (JUnit5), Kotlin (JUnit5), C# (MS Test), Go, Ruby (RSpec)