Test if an object has a specified property.

Test if a value is a boolean.

Test if a value is a plain object.

Test if a value is a string.

Insert supplied variable values into a format string.

Define a non-enumerable read-only property.

Format an error message for production.

Test if a value is a regular expression.

Create a string from a sequence of Unicode code points.

Replace search occurrences with a replacement string.

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.