Assert that an output does not match a regular expression

assert_not_matches() checks that an output field does not match a Perl-compatible regular expression. A missing field passes.

Usage

assert_not_matches(
  field = NULL,
  pattern,
  message = NULL,
  ignore_case = FALSE,
  type = c("assert", "suggest")
)

Arguments

field

The output field to check. With NULL, the whole output is checked, which suits outputs with a single field. A missing field fails the check.

pattern

A regular expression (Perl syntax) that must not match.

message

The message shown when the check fails, which with_assertions() also sends back to the model on a retry. With NULL, a message naming the field and pattern.

ignore_case

If TRUE, ignore case when matching.

type

"assert" (the default) for a hard assertion, which makes with_assertions() retry when it fails, or "suggest" for a soft one, which only gives a warning.

Value

An assertion for assertion_set() or with_assertions().

See also

Other assertions: assert_contains(), assert_custom(), assert_length(), assert_matches(), assert_not_contains(), assert_not_empty(), assert_one_of(), assert_range(), assertions, with_assertions()

Examples

assert_not_matches("answer", "https?://", "Do not include links")
#> 
#> ── Hard Assertion 
#> • Field: any field
#> • Message: "Do not include links"
assert_not_matches("summary", "```", "Do not include code blocks")
#> 
#> ── Hard Assertion 
#> • Field: any field
#> • Message: "Do not include code blocks"