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Create a test validation GitHub workflow
In this quickstart, you will learn how to create a GitHub workflow to test your .NET source code.
IEvangelist
dapine
02/16/2022
quickstart

Quickstart: Create a test validation GitHub workflow

In this quickstart, you will learn how to create a GitHub workflow to test your .NET source code. Automatically testing your .NET code within GitHub is referred to as continuous integration (CI), where pull requests or changes to the source trigger workflows to exercise. Along with building the source code, testing ensures that the compiled source code functions as the author intended. More often than not, unit tests serve as immediate feedback-loop to help ensure the validity of changes to source code.

[!INCLUDE prerequisites]

[!INCLUDE add-github-workflow]

Create a new file named build-and-test.yml, copy and paste the following YML contents into it:

:::code language="yml" source="snippets/dotnet-test-github-action/build-and-test.yml":::

In the preceding workflow composition:

  • The name: build and test defines the name, "build and test" will appear in workflow status badges.

    :::code language="yml" source="snippets/dotnet-test-github-action/build-and-test.yml" range="1":::

  • The on node signifies the events that trigger the workflow:

    :::code language="yml" source="snippets/dotnet-test-github-action/build-and-test.yml" range="3-9":::

    • Triggered when a push or pull_request occurs on the main branch where any files changed ending with the .cs or .csproj file extensions.

  • The env node defines named environment variables (env var).

    :::code language="yml" source="snippets/dotnet-test-github-action/build-and-test.yml" range="11-12":::

    • The environment variable DOTNET_VERSION is assigned the value '6.0.401'. The environment variable is later referenced to specify the dotnet-version of the actions/setup-dotnet@v3 GitHub Action.

  • The jobs node builds out the steps for the workflow to take.

    :::code language="yml" source="snippets/dotnet-test-github-action/build-and-test.yml" range="14-37" highlight="2,4-8,13-15,18,21,24":::

    • There is a single job, named build-<os> where the <os> is the operating system name from the strategy/matrix. The name and runs-on elements are dynamic for each value in the matrix/os. This will run on the latest versions of Ubuntu, Windows, and macOS.
    • The actions/setup-dotnet@v3 GitHub Action is used to setup the .NET SDK with the specified version from the DOTNET_VERSION environment variable.
    • The dotnet restore command is called.
    • The dotnet build command is called.
    • The dotnet test command is called.

[!INCLUDE add-status-badge]

Example test workflow status badge

Passing Failing No status
:::image type="content" source="media/test-badge-passing.svg" alt-text="GitHub: test passing badge"::: :::image type="content" source="media/test-badge-failing.svg" alt-text="GitHub: test failing badge"::: :::image type="content" source="media/test-badge-no-status.svg" alt-text="GitHub: test no-status badge":::

See also

Next steps

[!div class="nextstepaction"] Quickstart: Create a GitHub workflow to publish your .NET app