runc/tests/integration/README.md

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# runc Integration Tests
Integration tests provide end-to-end testing of runc.
Note that integration tests do **not** replace unit tests.
As a rule of thumb, code should be tested thoroughly with unit tests.
Integration tests on the other hand are meant to test a specific feature end
to end.
Integration tests are written in *bash* using the
[bats](https://github.com/sstephenson/bats) framework.
## Running integration tests
The easiest way to run integration tests is with Docker:
```
$ make integration
```
Alternatively, you can run integration tests directly on your host through make:
```
$ sudo make localintegration
```
Or you can just run them directly using bats
```
$ sudo bats tests/integration
```
To run a single test bucket:
```
$ make integration TESTFLAGS="/checkpoint.bats"
```
To run them on your host, you will need to setup a development environment plus
[bats](https://github.com/sstephenson/bats#installing-bats-from-source)
For example:
```
$ cd ~/go/src/github.com
$ git clone https://github.com/sstephenson/bats.git
$ cd bats
$ ./install.sh /usr/local
```
> **Note**: There are known issues running the integration tests using
> **devicemapper** as a storage driver, make sure that your docker daemon
> is using **aufs** if you want to successfully run the integration tests.
## Writing integration tests
[helper functions]
(https://github.com/opencontainers/runc/blob/master/test/integration/helpers.bash)
are provided in order to facilitate writing tests.
```sh
#!/usr/bin/env bats
# This will load the helpers.
load helpers
# setup is called at the beginning of every test.
function setup() {
# see functions teardown_hello and setup_hello in helpers.bash, used to
# create a pristine environment for running your tests
teardown_hello
setup_hello
}
# teardown is called at the end of every test.
function teardown() {
teardown_hello
}
@test "this is a simple test" {
run "$RUNC" start containerid
# "run" automatically populates $status, $output and $lines.
# Please refer to bats documentation to find out more.
[ "$status" -eq 0 ]
# check expected output
[[ "${output}" == *"Hello"* ]]
}
```