swirl (version 2.2.15)

expr_uses_func: Test that a particular function has been used.

Description

Returns TRUE if the e$expr uses the function whose name is given as the first argument.

Usage

expr_uses_func(func)

Arguments

func

name of the function expected to be used

Value

• TRUE or FALSE

See Also

Other AnswerTests: AnswerTests; any_of_exprs; expr_creates_var; expr_identical_to; expr_is_a; func_of_newvar_equals; omnitest; val_has_length; val_matches; var_is_a

Examples

# Test that the user has entered an expression using sd()
#
expr_uses_func('sd')