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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.


expect_true(object, info = NULL, label = NULL)

expect_false(object, info = NULL, label = NULL)



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.


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.


Used to customise failure messages. For expert use only.


Attributes are ignored.


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)