AlreadyExistsf returns an error which satisfies IsAlreadyExists().

AssertError is an assert helper to check for an expected error.

BadRequestf returns an error which satisfies IsBadRequest().

Cause returns the cause of the provided error.

Forbiddenf returns an error which satisfies IsForbidden().

IsAlreadyExists reports whether the error was created with AlreadyExistsf().

IsBadRequest reports whether err was created with BadRequestf().

IsForbidden reports whether the error was created with Forbiddenf().

IsNotFound reports whether err was created with NotFoundf().

IsNotImplemented reports whether err was created with NotImplementedf().

IsTimeout reports whether err was created with Timeoutf().

IsUnauthorized reports whether err was created with Unauthorizedf().

NotFoundf returns an error which satisfies IsNotFound().

NotImplementedf returns an error which satisfies IsNotImplemented().

RequireError is a require helper to check for an expected error.

Timeoutf returns an error which satisfies IsTimeout().

Unauthorizedf returns an error which satisfies IsUnauthorized().

WriteHTTPStatus writes the provided error to the provided response writer.

Err defines the extended error struct.