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README.TESTS
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README.TESTS
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TESTING OVERVIEW
----------------
The normal test suite is under ./tests/suite/base
Run it with
$ make check
Or if you want to run it manually, do
$ lua tests/run-tests.lua tests/suite/base
CREATING A NEW TEST CASE
------------------------
A test case in this testing environment is made of the following components
./t/test_name.test
./t/test_name.lua (optional)
./t/test_name.options (optional)
./r/test_name.result
The basics are like in the server test suite.
a ./t/test_name.test contains SQL statements and mysqltest commands as defined in the manual
http://dev.mysql.com/doc/mysqltest/en/mysqltest-commands.html
The corresponding ./r/test_name.result contains the output of the statements above, as produced by mysqltest.
In addition to the above basics, when preparing a test case for MySSQL Proxy, you can add the following ones:
./t/test_name.lua
This is a Lua script that gets loaded to MySQL Proxy before the test starts.
If no such test is defined, the Proxy starts with an empty script.
./t/test_name.options
This file contains Lua instructions that are executed before the test.
For the user's convenience, there are a few functions that you can call from this file
* start_proxy(proxy_name, options_table)
starts a proxy instance, with given parameters. The proxy name is
used to retrieve information about this instance, to use the proxy
or to remove it
example:
start_proxy('my_name',
{
["proxy-backend-addresses"] = PROXY_HOST .. ':' .. PROXY_MASTER_PORT ,
["proxy-read-only-backend-addresses"] = PROXY_HOST .. ':' .. PROXY_SLAVE_PORT ,
["proxy-address"] = PROXY_HOST .. ':' .. PROXY_PORT ,
["admin-address"] = PROXY_HOST .. ':' .. ADMIN_PORT ,
["pid-file"] = PROXY_PIDFILE,
["proxy-lua-script"] = 'my_name.lua',
})
As illustrated, there are several global variables that can be referenced within this
options file:
PROXY_HOST
PROXY_PORT
ADMIN_PORT
(TODO: complete the list)
* stop_proxy()
removes all proxy instances created with start_proxy()
* simulate_replication([master_options,slave_options])
starts two instances of the proxy, both pointing to the same
backend server. You can connect to a real replication, by
supplying appropriate options
* chain_proxy(first_lua_script, second_lua_script [, use_replication])
starts two proxy instances, the first one pointing to the backend
server, the second one pointing to the first instance.
If use_replication is given (boolean), then a master backend is used
instead of a real backend. If no master/slave replication is
available, simulate_replication() is called
* sql_execute(queries, proxy_name)
sends one or more queries to a given proxy. ('queries' can be either
a string or an array of strings)
If no proxy name is provided, the query is sent to the backend server.
SKIPPING TESTS
--------------
If you want to skip one or more tests, edit the file suite_name/tests_to_skip.lua
CREATING A NEW TEST SUITE
-------------------------
The Proxy test suite follows the same principles used by the server test suite.
There is a directory (usually ./t) containing .test scripts, with the
instructions to run. And there is another directory (./r) containing the
expected results. For each .test file in ./t, there must be a corresponding
.tesult file in ./r
For more information on the test framework, see the manual.
http://dev.mysql.com/doc/mysqltest/en/index.html
To run your test suite, create a directory under ./trunk/tests/suite, add two
subdirectories /t and /r, and then use the above mentioned command.
For example:
$ mkdir tests/suite/myapp
$ mkdir tests/suite/myapp/t
$ mkdir tests/suite/myapp/r
# add test and result files under t and r
$ lua tests/run-tests.lua tests/suite/myapp
LIBRARY PATHS
-------------
The test suite uses the following paths to search for Lua libraries when
a 'require' statement is issued. Each path is associated to an environment
variable:
This directory contains Lua libraries
variable default description
-------------- ------------------------- -----------------------
LUA_LDIR /usr/share/lua/5.1/?.lua server wide Lua libraries
LUA_PATH /usr/local/share/?.lua MySQL Proxy Lua libraries
LUA_USER_PATH ./trunk/lib/?.lua user defined libraries
In addition to the above paths, the current suite is searched for
libraries as well.
suite_name .. '/t/?.lua'
TROUBLESHOOTING
---------------
If Lua complains about missing the lfs library, prepend the LUA_CPATH variable to the actual command:
$ LUA_CPATH='tests/.libs/?.so' lua tests/run-tests.lua tests/suite/base
If the test suite complains about access denied, perhaps you need to provide a password.
The default user for the test suite is 'root', with no password.
If you want to run the tests with a different username and password,
set the following environment variables
MYSQL_USER
MYSQL_PASSWORD