AtCoder Unit Test

by YujiSoftware · Developer Tools

FeaturedManifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

Generate unit tests from AtCoder's problem page.

Users

815

+7 in 30 days

Rating

5.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#35K

#29K among extensions

Version

3.1.0

updated 19 Mar 2024

Users

monthly, 3 years

Latest, 15 Oct 2026: 815 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years

Latest, 15 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About AtCoder Unit Test

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)