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testing_and_dependencies.md

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Dependency management

We use go-modules to manage golang dependencies. In order to add a new package dependency to the project, you can perform go get <PACKAGE>@<VERSION> or edit the go.mod file and append the package along with the version you want to use.

Updating dependencies

The Makefile contains a rule called revendor which performs go mod vendor and go mod tidy.

  • go mod vendor resets the main module's vendor directory to include all packages needed to build and test all the main module's packages. It does not include test code for vendored packages.
  • go mod tidy makes sure go.mod matches the source code in the module. It adds any missing modules necessary to build the current module's packages and dependencies, and it removes unused modules that don't provide any relevant packages.
make revendor

The dependencies are installed into the vendor folder which should be added to the VCS.

⚠️ Make sure you test the code after you have updated the dependencies!

Testing

This section describes the process to execute tests. For more details about kind of tests that are executed, please refer test documentation

Unit tests

We have created make target verify which will internally run different rules like fmt for formatting, lint for linting check and most importantly test which will check the code against predefined unit tests. As currently there aren't enough test cases written to cover the entire code, you must check for failure cases manually and include test cases before raising pull request. We will eventually add more test cases for complete code coverage.

make verify

By default, we run tests without computing code coverage. To get the code coverage, you can set the environment variable COVER to true. This will log the code coverage percentage at the end of test logs. Also, all cover profile files will be accumulated under test/output/coverprofile.out directory. You can visualize the exact code coverage by running make show-coverage after running make verify with code coverage enabled.

Integration tests

You can also run integration tests for etcd-backup-restore on any given Kubernetes cluster. The test creates namespace integration-test on the cluster and deploys the etcd-backup-restore helm chart which in turn deploys the required secrets, configmap, services and finally the statefulset which contains the pod that runs etcd and backup-restore as a sidecar.

make integration-test-cluster

⚠️ Prerequisite for this command is to set the following environment variables:

  • INTEGRATION_TEST_KUBECONFIG: kubeconfig to the cluster on which you wish to run the test
  • ETCD_WRAPPER_VERSION: optional, defaults to v0.2.0
  • ETCDBR_VERSION: optional, defaults to v0.12.1
  • ACCESS_KEY_ID: S3 credentials
  • SECRET_ACCESS_KEY: S3 credentials
  • REGION: S3 credentials
  • STORAGE_CONTAINER: S3 bucket name

If you have a working setup of TestMachinery, you can run the integration tests on a TM-generated cluster as well.

Performance regression tests

Furthermore, you can check any regression in performance in terms of memory consumption and CPU utilization, bby running the provided performance regression tests.

make perf-regression-test

⚠️ Prerequisite for this command is to set the following environment variables:

  • PERF_TEST_KUBECONFIG: kubeconfig to the cluster on which you wish to run the test
  • ETCD_VERSION: optional, defaults to v3.3.17
  • ETCDBR_VERSION: etcd-backup-restore version to test against