Test if an object has a specified property.

Test if a value is a number having a nonnegative integer value.

Test if a value is a plain object.

Insert supplied variable values into a format string.

Symbol iterator.

stdlib TypeScript type declarations.

Define a non-enumerable read-only property.

Format an error message for production.

Test if a value is iterator-like.

Test if a double-precision floating-point numeric value is NaN.

Uniformly distributed pseudorandom numbers between 0 and 1.

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.