Run unit tests in CI

Author: stefanprodan

.github/actions/kubebuilder/Dockerfile

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+FROM giantswarm/tiny-tools
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

.github/actions/kubebuilder/action.yml

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+name: 'kubebuilder'
+description: 'A GitHub Action to run kubebuilder commands'
+author: 'Stefan Prodan'
+branding:
+  icon: 'command'
+  color: 'blue'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'

.github/actions/kubebuilder/entrypoint.sh

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+#!/bin/sh -l
+
+VERSION=2.3.1
+
+curl -sL https://go.kubebuilder.io/dl/${VERSION}/linux/amd64 | tar -xz -C /tmp/
+
+mkdir -p $GITHUB_WORKSPACE/kubebuilder
+mv /tmp/kubebuilder_${VERSION}_linux_amd64/* $GITHUB_WORKSPACE/kubebuilder/
+ls -lh $GITHUB_WORKSPACE/kubebuilder/bin
+
+echo "::add-path::$GITHUB_WORKSPACE/kubebuilder/bin"
+echo "::add-path::$RUNNER_WORKSPACE/$(basename $GITHUB_REPOSITORY)/kubebuilder/bin"

.github/workflows/test.yaml

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+name: test
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  unit:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Restore Go cache
+        uses: actions/cache@v1
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.14.x
+      - name: Setup Kubebuilder
+        uses: ./.github/actions/kubebuilder
+      - name: Run tests
+        run: make test
+        env:
+          KUBEBUILDER_ASSETS: ${{ github.workspace }}/kubebuilder/bin
+      - name: Check if working tree is dirty
+        run: |
+          if [[ $(git diff --stat) != '' ]]; then
+            echo 'run make test and commit changes'
+            exit 1
+          fi