{ # crash the connect()

    my $ok = eval { 
        App::RPi::EnvUI::DB->new(
            db_file => '/'
        ); 
        1; 
    };

    is 
        $ok, 
        undef, 
        "when a DBH can't be created, we die";
    
    like 
        $@, 
        qr/unable to open database/,
        "...and the error message is sane";
}

{ # good connect()

    my $db = App::RPi::EnvUI::DB->new(
        testing => 1
    );

    is 
        ref $db->{db}, 
        'DBI::db', 
        "dbh loaded ok";
}