expect_that
Expect that a condition holds.
Description
![[Superseded]](../help/figures/lifecycle-superseded.svg)
An old style of testing that's no longer encouraged.
Usage
expect_that(object, condition, info = NULL, label = NULL)
Arguments
object |
Object to test. Supports limited unquoting to make it easier to generate readable failures within a function or for loop. See quasi_label for more details. |
condition, |
a function that returns whether or not the condition is met, and if not, an error message to display. |
info |
Extra information to be included in the message. This argument is soft-deprecated and should not be used in new code. Instead see alternatives in quasi_label. |
label |
Used to customise failure messages. For expert use only. |
Value
the (internal) expectation result as an invisible list
3rd edition
![[Deprecated]](../help/figures/lifecycle-deprecated.svg)
This style of testing is formally deprecated as of the 3rd edition.
Use a more specific expect_ function instead.
See Also
fail() for an expectation that always fails.
Examples
expect_that(5 * 2, equals(10)) expect_that(sqrt(2) ^ 2, equals(2)) ## Not run: expect_that(sqrt(2) ^ 2, is_identical_to(2)) ## End(Not run)