| is_a {testthat} | R Documentation |
Tests whether or not an object inherits from any of a list of classes.
is_a(class) expect_is(object, class, info = NULL, label = NULL)
class |
character vector of class names |
object |
object to test |
info |
extra information to be included in the message (useful when writing tests in loops). |
label |
object label. When |
Other expectations: equals,
expect_equal,
expect_equivalent,
expect_error, expect_false,
expect_identical,
expect_match, expect_message,
expect_output, expect_true,
expect_warning,
gives_warning,
is_equivalent_to, is_false,
is_identical_to, is_true,
matches, prints_text,
shows_message,
takes_less_than, throws_error
expect_that(1, is_a("numeric"))
a <- matrix(1:10, nrow = 5)
expect_that(a, is_a("matrix"))
expect_that(mtcars, is_a("data.frame"))
expect_is(mtcars, "data.frame")
# alternatively for classes that have an is method
expect_that(is.data.frame(mtcars), is_true())
# doesn't read quite as nicely