Does code execute silently?
Checks that the code produces no output, messages, or warnings.
expect_silent(object)
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.  | 
The first argument, invisibly.
Other expectations: 
comparison-expectations,
equality-expectations,
expect_error(),
expect_length(),
expect_match(),
expect_named(),
expect_null(),
expect_output(),
expect_reference(),
inheritance-expectations,
logical-expectations
expect_silent("123")
f <- function() {
  message("Hi!")
  warning("Hey!!")
  print("OY!!!")
}
## Not run: 
expect_silent(f())
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.