Test if a value is a function.

Object constructor.

Insert supplied variable values into a format string.

Return an array of an object's own enumerable property names and symbols.

Format an error message for production.

Detect native Symbol support.

Test if a value is an object.

Symbols.

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 ca

Minimal TAP output formatter.

Benchmark harness.