Add operator-observability rules unit test (#1776)

* Vendor grafana/regexp package

Vendor grafana/regexp package, as it's needed for the alerts and
recording rules testing

Signed-off-by: assafad <aadmi@redhat.com>

* Add operator-observability rules unit test

Add rules unit test, which ensures that alerts and recording rules
definitions are following conventions.

Signed-off-by: assafad <aadmi@redhat.com>

---------

Signed-off-by: assafad <aadmi@redhat.com>

go.mod

@@ -122,6 +122,7 @@ require (
 	github.com/gorilla/mux v1.8.0 // indirect
 	github.com/gorilla/websocket v1.5.0 // indirect
 	github.com/gosuri/uitable v0.0.4 // indirect
+	github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd // indirect
 	github.com/gregjones/httpcache v0.0.0-20190203031600-7a902570cb17 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.16.0 // indirect
 	github.com/h2non/filetype v1.1.1 // indirect

go.sum

@@ -862,6 +862,8 @@ github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWm
 github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/gosuri/uitable v0.0.4 h1:IG2xLKRvErL3uhY6e1BylFzG+aJiwQviDDTfOKeKTpY=
 github.com/gosuri/uitable v0.0.4/go.mod h1:tKR86bXuXPZazfOTG1FIzvjIdXzd0mo4Vtn16vt0PJo=
+github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd h1:PpuIBO5P3e9hpqBD0O/HjhShYuM6XE0i/lbE6J94kww=
+github.com/grafana/regexp v0.0.0-20221122212121-6b5c0a4cb7fd/go.mod h1:M5qHK+eWfAv8VR/265dIuEpL3fNfeC21tXXp9itM24A=
 github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=
 github.com/gregjones/httpcache v0.0.0-20190203031600-7a902570cb17 h1:prg2TTpTOcJF1jRWL2zSU1FQNgB0STAFNux8GK82y8k=
 github.com/gregjones/httpcache v0.0.0-20190203031600-7a902570cb17/go.mod h1:FecbI9+v66THATjSRHfNgh1IVFe/9kFxbXtjV0ctIMA=

pkg/monitoring/rules/rules_suite_test.go

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

pkg/monitoring/rules/rules_test.go

@@ -0,0 +1,37 @@
+package rules_test
+
+import (
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
+	"github.com/machadovilaca/operator-observability/pkg/testutil"
+
+	"github.com/kubevirt/cluster-network-addons-operator/pkg/monitoring/rules"
+)
+
+var _ = Describe("Rules Validation", func() {
+	var linter *testutil.Linter
+
+	BeforeEach(func() {
+		Expect(rules.SetupRules("")).To(Succeed())
+		linter = testutil.New()
+	})
+
+	It("Should validate alerts", func() {
+		linter.AddCustomAlertValidations(
+			testutil.ValidateAlertNameLength,
+			testutil.ValidateAlertRunbookURLAnnotation,
+			testutil.ValidateAlertHealthImpactLabel,
+			testutil.ValidateAlertPartOfAndComponentLabels)
+
+		alerts := rules.ListAlerts()
+		problems := linter.LintAlerts(alerts)
+		Expect(problems).To(BeEmpty())
+	})
+
+	It("Should validate recording rules", func() {
+		recordingRules := rules.ListRecordingRules()
+		problems := linter.LintRecordingRules(recordingRules)
+		Expect(problems).To(BeEmpty())
+	})
+})