stdlib-js/assert-is-string

Define a non-enumerable read-only property.

Test if a value is a boolean.

Proxies nodejs require in order to allow overriding dependencies during testing.

tap-producing test harness for node and browsers

Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests and browser tests. Built for scale

Minimal TAP output formatter.

Benchmark harness.

Detect native Symbol.toStringTag support.

Determine the specification defined classification of an object.

Detect native Symbol support.