Check if selenider can be used

Checks if selenider's dependencies are available, and that we are in an environment where it makes sense to open a selenider session.

skip_if_selenider_unavailable() skips a testthat test if selenider_available() returns FALSE.

Usage

selenider_available(session = c("chromote", "selenium"), online = TRUE)

skip_if_selenider_unavailable(session = c("chromote", "selenium"))

Arguments

session

Which session we should check. "chromote" is used by default.

online

Whether we need to check for an internet connection.

Value

A boolean flag: TRUE or FALSE.

Details

Specifically, the following is checked:

• The SELENIDER_AVAILABLE environment variable. Set this to "TRUE" or "FALSE" to override the return value of this function.

• Whether we are on CRAN (using the NOT_CRAN environment variable). If we are, the function returns FALSE.

• Whether an internet connection is available (using curl::nslookup()).

If session is "chromote", we also check:

• Whether chromote is installed.

• Whether chromote::find_chrome() does not error.

If session is "selenium", we check:

• Whether selenium is installed.

• Whether we can find a valid browser that is supported by selenium.

Examples

selenider_available()