pub fn test_client_from_env() -> Result<Option<HttpClient>, BaseOverrideError>Expand description
The allow-http test client for the overrides set in the environment, or
None when no BaseOverride::selects_test_client variable is set and
the caller should build its production client.
In test mode every row that is set is registered – selecting or not – and nothing else is: see the module docs on exclusivity.
§Errors
BaseOverrideError::NotAUrl for a set variable that does not parse, in
test mode. A malformed non-selecting variable outside test mode is the
source’s to report, as before.