An old style of testing that's no longer encouraged.
expect_that(object, condition, info = NULL, label = NULL)
| 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. |
the (internal) expectation result as an invisible list
fail() for an expectation that always fails.
expect_that(5 * 2, equals(10)) expect_that(sqrt(2) ^ 2, equals(2)) if (FALSE) { expect_that(sqrt(2) ^ 2, is_identical_to(2)) }