Sisyphus

is an alarmingly decent testing framework in less than 500 LOC. Code, test, fail, repeat. Like rolling a boulder up a hill.

Test suites...

• Are arrays of assertions
• Can be written in your modules
• Don't have a crazy DSL
• Run in browsers
• Output wherever you want, and look pretty (devtools, for starters)
• Support high-level browser automation (for integration testing)

Tests...

• Are written with eq and refeq
• That's it
• Seriously
• What did you want

Also, on a philosophical note...

• Don't write tests for your types (write types for your types)
• Don't write tests for your tests (write tests for your code)
• Never write a test instead of an assertion (make guarantees!)