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

Make an assertion that actual contains the expected values. If not then an error will be thrown.

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

Make an assertion that actual match RegExp expected. If not then thrown

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

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

Make an assertion that actual contains expected. If not then thrown.

Executes a function, expecting it to throw. If it does not, then it throws. An error class and a string that should be included in the error message can also be asserted.

Executes a function which returns a promise, expecting it to throw or reject. If it does not, then it throws. An error class and a string that should be included in the error message can also be asserted.

Forcefully throws a failed assertion

Use this to stub out methods that will throw when invoked.

Use this to assert unreachable code.