Expectation: is the object true?

Description

This is a fall-back expectation 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

  is_true()

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

Arguments

See Also

is_false for complement

Other expectations: equals, expect_equal, expect_equivalent, expect_error, expect_false, expect_identical, expect_is, expect_match, expect_message, expect_output, expect_warning, gives_warning, is_a, is_equivalent_to, is_false, is_identical_to, matches, prints_text, shows_message, takes_less_than, throws_error

Examples

expect_that(2 == 2, is_true())
expect_true(2 == 2)
# Failed expectations will throw an error
## Not run: 
expect_that(2 != 2, is_true())

## End(Not run)
expect_that(!(2 != 2), is_true())
# or better:
expect_that(2 != 2, is_false())

a <- 1:3
expect_that(length(a) == 3, is_true())
# but better to use more specific expectation, if available
expect_that(length(a), equals(3))