This is a special case because NULL is a singleton so it's possible
check for it either with expect_equal(x, NULL) or expect_type(x, "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
Other expectations:
comparison-expectations,
equality-expectations,
expect_error(),
expect_length(),
expect_match(),
expect_named(),
expect_output(),
expect_reference(),
expect_silent(),
inheritance-expectations,
logical-expectations
Examples
x <- NULL
y <- 10
expect_null(x)
show_failure(expect_null(y))
#> Failed expectation:
#> `y` is not NULL
#>
#> `actual` is a double vector (10)
#> `expected` is NULL