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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/expectations-matches.R
\name{expect_match}
\alias{expect_match}
\alias{expect_no_match}
\title{Does a string match a regular expression?}
\usage{
expect_match(
object,
regexp,
perl = FALSE,
fixed = FALSE,
...,
all = TRUE,
info = NULL,
label = NULL
)
expect_no_match(
object,
regexp,
perl = FALSE,
fixed = FALSE,
...,
all = TRUE,
info = NULL,
label = NULL
)
}
\arguments{
\item{object}{Object to test.
Supports limited unquoting to make it easier to generate readable failures
within a function or for loop. See \link{quasi_label} for more details.}
\item{regexp}{Regular expression to test against.}
\item{perl}{logical. Should Perl-compatible regexps be used?}
\item{fixed}{If \code{TRUE}, treats \code{regexp} as a string to be matched exactly
(not a regular expressions). Overrides \code{perl}.}
\item{...}{
Arguments passed on to \code{\link[base:grep]{base::grepl}}
\describe{
\item{\code{ignore.case}}{if \code{FALSE}, the pattern matching is \emph{case
sensitive} and if \code{TRUE}, case is ignored during matching.}
\item{\code{useBytes}}{logical. If \code{TRUE} the matching is done
byte-by-byte rather than character-by-character. See
\sQuote{Details}.}
}}
\item{all}{Should all elements of actual value match \code{regexp} (TRUE),
or does only one need to match (FALSE).}
\item{info}{Extra information to be included in the message. This argument
is soft-deprecated and should not be used in new code. Instead see
alternatives in \link{quasi_label}.}
\item{label}{Used to customise failure messages. For expert use only.}
}
\description{
Does a string match a regular expression?
}
\details{
\code{expect_match()} is a wrapper around \code{\link[=grepl]{grepl()}}. See its documentation for
more detail about the individual arguments. \code{expect_no_match()} provides
the complementary case, checking that a string \emph{does not} match a regular
expression.
}
\section{Functions}{
\itemize{
\item \code{expect_no_match()}: Check that a string doesn't match a regular
expression.
}}
\examples{
expect_match("Testing is fun", "fun")
expect_match("Testing is fun", "f.n")
expect_no_match("Testing is fun", "horrible")
\dontrun{
expect_match("Testing is fun", "horrible")
# Zero-length inputs always fail
expect_match(character(), ".")
}
}
\seealso{
Other expectations:
\code{\link{comparison-expectations}},
\code{\link{equality-expectations}},
\code{\link{expect_error}()},
\code{\link{expect_length}()},
\code{\link{expect_named}()},
\code{\link{expect_null}()},
\code{\link{expect_output}()},
\code{\link{expect_reference}()},
\code{\link{expect_silent}()},
\code{\link{inheritance-expectations}},
\code{\link{logical-expectations}}
}
\concept{expectations}
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