Test that the value of the expression is of a specific class.
Returns TRUE if a variable of the given name exists
in the global environment and is of the given class.
var_is_a(class, var_name)
class |
expected class which the given variable |
var_name |
name of the variable |
TRUE or FALSE
Other AnswerTests:
AnswerTests,
any_of_exprs(),
calculates_same_value(),
expr_creates_var(),
expr_identical_to(),
expr_is_a(),
expr_uses_func(),
func_of_newvar_equals(),
omnitest(),
val_has_length(),
val_matches()
## Not run:
# Test that a variable named "x" in the global environmentis numeric.
var_is_a('numeric', 'x')
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.