Make an assertion, error will be thrown if expr does not have truthy value.

Make an assertion that actual and expected are equal, deeply. If not deeply equal, then throw.

Make an assertion that obj is an instance of type. If not then throw.

Executes a function which returns a promise, expecting it to reject.

Make an assertion that actual matches a snapshot. If the snapshot and actual do not a match, then throw.

Asserts that a spy is called as expected.

Asserts that a spy is called as much as expected and no more.

Make an assertion that actual and expected are strictly equal. If not then throw.

Executes a function, expecting it to throw. If it does not, then it throws.

Asserts at compile time that the provided type argument's type resolves to the expected boolean literal type.

Make the text bold.

Copies from src to dst until either EOF (null) is read from src or an error occurs. It resolves to the number of bytes copied or rejects with the first error encountered while copying.

Registers a test suite.

Expand the glob string from the specified root directory and yield each result as a WalkEntry object.

Takes an input date and a formatString to format to a string.

Greater than comparison

Registers an individual test case.

Less than comparison

Set text color to red.

Wraps a function or instance method with a Spy.

Remove ANSI escape codes from the string.

Registers a test suite.

Registers an individual test case.

Checks if type T exactly matches type U.