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71 lines
2.1 KiB
Markdown
71 lines
2.1 KiB
Markdown
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# Integration Tests
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## Running tests
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The main entry point for running tests is the `./test.sh` script.
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It can be used to run the entire test suite, or just a single test case.
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### Run all tests
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```sh
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./test.sh
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```
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### Run a single test case
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```sh
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./test.sh <directory-name>
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```
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### Configuring a test run
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In addition to the match pattern, which can be given as the first positional argument, certain behavior can be changed by setting environment variables:
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#### `BUILD_IMAGE`
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When set, the test script will build an up-to-date `docker-volume-backup` image from the current state of your source tree, and run the tests against it.
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```sh
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BUILD_IMAGE=1 ./test.sh
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```
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The default behavior is not to build an image, and instead look for a version on your host system.
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#### `IMAGE_TAG`
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Setting this value lets you run tests against different existing images, so you can compare behavior:
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```sh
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IMAGE_TAG=v2.30.0 ./test.sh
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```
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#### `NO_IMAGE_CACHE`
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When set, images from remote registries will not be cached and shared between sandbox containers.
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```sh
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NO_IMAGE_CACHE=1 ./test.sh
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```
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By default, two local images are created that persist the image data and provide it to containers at runtime.
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## Understanding the test setup
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The test setup runs each test case in an isolated Docker container, which itself is running an otherwise unused Docker daemon.
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This means, tests can rely on noone else using that daemon, making expectations about the number of running containers and so forth.
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As the sandbox container is also expected to be torn down post test, the scripts do not need to do any clean up or similar.
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## Anatomy of a test case
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The `test.sh` script looks for an exectuable file called `run.sh` in each directory.
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When found, it is executed and signals success by returning a 0 exit code.
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Any other exit code is considered a failure and will halt execution of further tests.
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There is an `util.sh` file containing a few commonly used helpers which can be used by putting the following prelude to a new test case:
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```sh
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cd "$(dirname "$0")"
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. ../util.sh
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current_test=$(basename $(pwd))
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```
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