# Testing Tools
## How to Check Compatibility Between Compilers
Since the interfaces used in the cpp bridgetest are not changed often
one can just build the `cppobj.uno.dll` and the `constructors.uno.dll`
(`testtools/source/bridgetest`) in an
old environment and then use them in the new environment. That is the files
are copied into the `testtools/wntmsciXX.pro` folder which corresponds to the
new environment.
On Windows this test will typically fail because the tests use the
`cppu::getCaughtException` function, which only works when all libs are build
using the same runtime.
This part of the test can switched off. To do this go into the
`testtools/source/bridgetest` folder and call
dmake compcheck=1
This will add a new compiler define (`-DCOMPCHECK`) and will be used in the
`bridgetest.cxx` to switch off the code which uses the `getCaughtException` function.
However, there is still a test which causes the test component to throw
and `IllegalArgumentException`. This still works.
## Using source / bridgetest for Stress Testing
Start a modified `bridgetest_server` (with the final `--singleaccept` argument
removed from the uno executable call) or a modified `bridgetest_javaserver` (with
the final `singleaccept` argument replaced with `multi` in the java executable
call), then start a modified `bridgetest_client` (with a final `stress` argument
added to the uno executable call). The client will continuously establish
connections to the server which are immediately destroyed again. The test will
run forever, unless an error occurs.
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