These are fall-back expectations that you can use when none of the other more specific expectations apply. The disadvantage is that you may get a less informative error message.
Usage
expect_true(object, info = NULL, label = NULL)
expect_false(object, 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.
- 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.
See also
is_false() for complement
Other expectations:
comparison-expectations,
equality-expectations,
expect_error(),
expect_length(),
expect_match(),
expect_named(),
expect_null(),
expect_output(),
expect_reference(),
expect_silent(),
inheritance-expectations
Examples
expect_true(2 == 2)
# Failed expectations will throw an error
if (FALSE) {
expect_true(2 != 2)
}
expect_true(!(2 != 2))
# or better:
expect_false(2 != 2)
a <- 1:3
expect_true(length(a) == 3)
# but better to use more specific expectation, if available
expect_equal(length(a), 3)