testthat (version 2.2.1)

logical-expectations: Expectation: is the object true/false?

Description

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.

Details

Attributes are ignored.

See Also

is_false() for complement

Other expectations: comparison-expectations, equality-expectations, expect_length, expect_match, expect_named, expect_null, inheritance-expectations, output-expectations

Examples

# NOT RUN {
expect_true(2 == 2)
# Failed expectations will throw an error
# }
# NOT RUN {
expect_true(2 != 2)
# }
# NOT RUN {
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)
# }