I am writing a script that reads connection information from a config
file, and based, on what it finds, connects to multiple mysql servers
and performs tasks. To test this script, I need to set up test
servers, but getting them running without causing the tests to be
rerun when they stop is a bit..tricky. I cannot say that I'm proud of
it, but here is how I did it:
tc_my_script_spec.rb:
require 'my_script'
...
def setup_test_servers
teardown_test_servers(:kill)
...
pids = []
...
pid = fork {`nohup mysqld_safe --no-defaults #{server_options * ' '}
&`}
raise "mysqld_safe fork failed" if $? != 0
if pid
pids << pid
else
exit!
end
...
pids.each{|pid| Process.kill(9,pid)}
Spec::Runner.configure do |config|
config.after(:suite)
at_exit(teardown_test_servers(nil)
end
end
end
def teardown_test_servers(kill)
@servers.each do |server, data|
connection_options = {
:host => data[:host],
:port => data[:port],
:user => 'shutdown',
}
connection_string = '--no-defaults ' + connect_options.map{|opt,
val| "--#{opt}=#{val}"} * ' '
if doit_status("mysqladmin #{connect_string} ping 2>&1") == 0
doit("mysqladmin #{connect_string} shutdown")
end
doit("rm -rf #{datadir}") if kill or !File.exists? "#{datadir}/keep"
end
def doit(command)
response = core_do(command)
$? != 0 and raise "Command: #{command}\nExit code :#{'%x' % $?}.\n#
{response}"
response
end
def doit_status(command)
core_do(command)
$? >> 8
end
def core_do(command)
response = `#{command}`
signal = $? & 0x7f
kill(signal, 0) if signal != 0
response
end
...
describe ...
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