Assert that all names are among names of a list of data.frame.

Assert that all names are among names of a list of data.frame.

Usage

assert_all_tablenames(db, tab, null_ok = TRUE, qualifier = NULL)

Arguments

db

(list of data.frame) input to check for the presence of tables.

tab

(character) the names of the tables to be checked.

null_ok

(flag) can x be NULL.

qualifier

(string) to be returned if the check fails.

Value

invisible TRUE or an error message if the criteria are not fulfilled.

Examples

lsd <- list(
  mtcars = mtcars,
  iris = iris
)
assert_all_tablenames(lsd, c("mtcars", "iris"), qualifier = "first test:")