Add basic unit test framework (#390)

Co-authored-by: Marco Franssen <[email protected]>

tests/unit/main.go

@@ -0,0 +1 @@
+package unit

tests/unit/spire_test.go

@@ -0,0 +1,44 @@
+package unit_test
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
+	helmchart "helm.sh/helm/v3/pkg/chart"
+	helmloader "helm.sh/helm/v3/pkg/chart/loader"
+	helmutil "helm.sh/helm/v3/pkg/chartutil"
+	helmengine "helm.sh/helm/v3/pkg/engine"
+)
+
+func ValueStringRender(chart *helmchart.Chart, values string) (map[string]string, error) {
+	v, err := helmutil.ReadValues([]byte(values))
+	if err != nil {
+		return nil, err
+	}
+	ro := helmutil.ReleaseOptions{Name: "spire", Namespace: "spire-server", Revision: 1, IsUpgrade: false, IsInstall: true}
+	v, err = helmutil.ToRenderValues(chart, v, ro, helmutil.DefaultCapabilities);
+	if err != nil {
+		return nil, err
+	}
+	objs, err := helmengine.Render(chart, v)
+	return objs, err
+}
+
+var _ = Describe("Spire", func() {
+	chart, err := helmloader.Load("../../charts/spire")
+	Expect(err).Should(Succeed())
+	Describe("spire-server.upstream.cert-manager", func() {
+		It("issuer_name when set is passed through", func() {
+			objs, err := ValueStringRender(chart, `
+spire-server:
+  upstreamAuthority:
+    certManager:
+      enabled: true
+      issuer_name: abc123
+`)
+			Expect(err).Should(Succeed())
+			notes := objs["spire/charts/spire-server/templates/configmap.yaml"]
+			Expect(notes).Should(ContainSubstring("abc123"))
+		})
+	})
+})

tests/unit/unit_suite_test.go

@@ -0,0 +1,13 @@
+package unit_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestUnit(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Unit Suite")
+}