Construct an expectation object

For advanced use only. If you are creating your own expectation, you should call expect() instead. See vignette("custom-expectation") for more details.

expectation(type, message, srcref = NULL, trace = NULL)

new_expectation(
  type,
  message,
  ...,
  srcref = NULL,
  trace = NULL,
  .subclass = NULL
)

exp_signal(exp)

is.expectation(x)

Arguments

type	Expectation type. Must be one of "success", "failure", "error", "skip", "warning".
message	Message describing test failure
srcref	Optional srcref giving location of test.
trace	An optional backtrace created by rlang::trace_back(). When supplied, the expectation is displayed with the backtrace.
...	Additional attributes for the expectation object.
.subclass	An optional subclass for the expectation object.
exp	An expectation object, as created by new_expectation().
x	object to test for class membership

Details

Create an expectation with expectation() or new_expectation() and signal it with exp_signal().