Common assertion functions, especially useful for testing
default
A library of assertion functions.
If the assertion is false an AssertionError will be thrown which will
result in pretty-printed diff of failing assertion.
Make an assertion, error will be thrown if expr does not have truthy value.
Make an assertion that actual and expected are almost equal numbers through
a given tolerance. It can be used to take into account IEEE-754 double-precision
floating-point representation limitations.
If the values are not almost equal then throw.
Make an assertion that actual includes 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 is not null or undefined. If not then throw.
Make an assertion that obj is an instance of type.
If not then throw.
Make an assertion that error is an Error.
If not then an error will be thrown.
An error class and a string that should be included in the
error message can also be asserted.
Make an assertion that actual match RegExp expected. If not
then throw.
Make an assertion that actual and expected are not equal, deeply.
If not then throw.
Make an assertion that obj is not an instance of type.
If so, then throw.
Make an assertion that actual not match RegExp expected. If match
then throw.
Make an assertion that actual and expected are not strictly equal.
If the values are strictly equal then throw.
Make an assertion that actual object is a subset of expected object, deeply.
If not, then throw.
Executes a function which returns a promise, expecting it to reject.
Make an assertion that actual and expected are strictly equal. If
not then throw.
Make an assertion that actual includes expected. If not then throw.
Executes a function, expecting it to throw. If it does not, then it throws.
Deep equality comparison used in assertions
Forcefully throws a failed assertion
Use this to stub out methods that will throw when invoked.
Use this to assert unreachable code.
Make an assertion, error will be thrown if expr does not have truthy value.
Make an assertion that actual and expected are almost equal numbers through
a given tolerance. It can be used to take into account IEEE-754 double-precision
floating-point representation limitations.
If the values are not almost equal then throw.
Make an assertion that actual includes 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 is not null or undefined. If not then throw.
Make an assertion that obj is an instance of type.
If not then throw.
Make an assertion that error is an Error.
If not then an error will be thrown.
An error class and a string that should be included in the
error message can also be asserted.
Make an assertion that actual match RegExp expected. If not
then throw.
Make an assertion that actual and expected are not equal, deeply.
If not then throw.
Make an assertion that obj is not an instance of type.
If so, then throw.
Make an assertion that actual not match RegExp expected. If match
then throw.
Make an assertion that actual and expected are not strictly equal.
If the values are strictly equal then throw.
Make an assertion that actual object is a subset of expected object, deeply.
If not, then throw.
Executes a function which returns a promise, expecting it to reject.
Make an assertion that actual and expected are strictly equal. If
not then throw.
Make an assertion that actual includes expected. If not then throw.
Executes a function, expecting it to throw. If it does not, then it throws.
Deep equality comparison used in assertions
Forcefully throws a failed assertion
Converts the input into a string. Objects, Sets and Maps are sorted so as to make tests less flaky
Use this to stub out methods that will throw when invoked.
Use this to assert unreachable code.