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# iptables Tests
iptables tests are run via `scripts/iptables_test.sh`.
## Test Structure
Each test implements `TestCase`, providing (1) a function to run inside the
container and (2) a function to run locally. Those processes are given each
others' IP addresses. The test succeeds when both functions succeed.
The function inside the container (`ContainerAction`) typically sets some
iptables rules and then tries to send or receive packets. The local function
(`LocalAction`) will typically just send or receive packets.
### Adding Tests
1) Add your test to the `iptables` package.
2) Register the test in an `init` function via `RegisterTestCase` (see
`filter_input.go` as an example).
3) Add it to `iptables_test.go` (see the other tests in that file).
Your test is now runnable with bazel!
## Run individual tests
Build the testing Docker container:
```bash
$ bazel run //test/iptables/runner-image -- --norun
```
Run an individual test via:
```bash
$ bazel test //test/iptables:iptables_test --test_filter=<TESTNAME>
```
To run an individual test with `runc`:
```bash
$ bazel test //test/iptables:iptables_test --test_filter=<TESTNAME> --test_arg=--runtime=runc
```
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