feat: add reloader scenario tests

apptests/appscenarios/appscenarios.go

@@ -0,0 +1,74 @@
+// Package appscenarios provides a set of application test scenarios that can be executed
+// in a Kubernetes environment. The package defines an AppScenario interface that specifies the
+// behavior and name of each scenario, and a List type that implements methods to execute, get,
+// and check scenarios.
+//
+// The package currently supports one scenario for the reloader application, but more scenarios can be
+// added by implementing the AppScenario interface and registering them in the scenariosList variable.
+package appscenarios
+
+import (
+	"context"
+	"fmt"
+	"path/filepath"
+
+	"github.com/mesosphere/kommander-applications/apptests/environment"
+)
+
+// AppScenario defines the behavior and name of an application test scenario
+type AppScenario interface {
+	Execute(context.Context, *environment.Env) error // logic implemented by a scenario
+	Name() string                                    // scenario name
+}
+
+type List map[string]AppScenario
+
+// Execute runs all the scenarios in the list and returns the first error encountered, if any.
+func (s List) Execute(ctx context.Context, env *environment.Env) error {
+	for _, sc := range s {
+		if err := sc.Execute(ctx, env); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Get returns the associated scenario for the given application name, or nil if it does not exist.
+func Get(application string) AppScenario {
+	s, ok := scenariosList[application]
+	if !ok {
+		return nil
+	}
+	return s
+}
+
+// Has checks if the associated scenario for the given application exist.
+func Has(application string) bool {
+	_, ok := scenariosList[application]
+	return ok
+}
+
+// AbsolutePathTo returns the absolute path to the given application directory.
+func AbsolutePathTo(application string) (string, error) {
+	dir, err := filepath.Abs(filepath.Join("../../services/", application))
+	if err != nil {
+		return "", err
+	}
+
+	// filepath.Glob returns a sorted slice of matching paths
+	matches, err := filepath.Glob(filepath.Join(dir, "*"))
+	if err != nil {
+		return "", err
+	}
+
+	if len(matches) == 0 {
+		return "", fmt.Errorf("no application directory found for %s", application)
+	}
+
+	return matches[0], nil
+}
+
+// This is the ScenarioList of all available scenarios.
+var scenariosList = List{
+	"reloader": reloader{},
+}

apptests/appscenarios/appscenarios_test.go

@@ -0,0 +1,17 @@
+package appscenarios
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAbsolutePathTo(t *testing.T) {
+	absAppPath, err := AbsolutePathTo("reloader")
+	assert.NoError(t, err)
+
+	expected := filepath.Join("kommander-applications", "services", "reloader")
+	assert.Contains(t, absAppPath, expected)
+	assert.NotEmpty(t, filepath.Base(absAppPath))
+}

apptests/appscenarios/reloader.go

@@ -0,0 +1,75 @@
+package appscenarios
+
+import (
+	"context"
+	"path/filepath"
+	"time"
+
+	fluxhelmv2beta1 "github.com/fluxcd/helm-controller/api/v2beta1"
+	"github.com/mesosphere/kommander-applications/apptests/environment"
+	"github.com/mesosphere/kommander-applications/apptests/flux"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/wait"
+	genericCLient "sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+type reloader struct{}
+
+func (r reloader) Name() string {
+	return "reloader"
+}
+
+var _ AppScenario = (*reloader)(nil)
+
+const (
+	pollInterval       = 2 * time.Second
+	kommanderNamespace = "kommander"
+)
+
+func (r reloader) Execute(ctx context.Context, env *environment.Env) error {
+	appPath, err := AbsolutePathTo(r.Name())
+	if err != nil {
+		return err
+	}
+
+	// apply defaults config maps first
+	defaultKustomizations := filepath.Join(appPath, "/defaults")
+	err = env.ApplyKustomizations(ctx, defaultKustomizations, map[string]string{
+		"releaseNamespace": kommanderNamespace,
+	})
+	if err != nil {
+		return err
+	}
+	// apply the rest of kustomizations
+	err = env.ApplyKustomizations(ctx, appPath, map[string]string{
+		"releaseNamespace": kommanderNamespace,
+	})
+	if err != nil {
+		return err
+	}
+
+	client, err := genericCLient.New(env.K8sClient.Config(), genericCLient.Options{Scheme: flux.NewScheme()})
+	if err != nil {
+		return err
+	}
+
+	hr := &fluxhelmv2beta1.HelmRelease{}
+	hr.SetName(r.Name())
+	hr.SetNamespace(kommanderNamespace)
+
+	err = wait.PollUntilContextCancel(ctx, pollInterval, true, func(ctx context.Context) (done bool, err error) {
+		err = client.Get(ctx, genericCLient.ObjectKeyFromObject(hr), hr)
+		if err != nil {
+			return false, err
+		}
+
+		for _, cond := range hr.Status.Conditions {
+			return cond.Status == metav1.ConditionTrue &&
+				cond.Type == fluxhelmv2beta1.ReleasedCondition, nil
+		}
+
+		return true, nil
+	})
+
+	return err
+}

apptests/appscenarios/reloader_test.go

@@ -0,0 +1,21 @@
+package appscenarios
+
+import (
+	"context"
+	"testing"
+
+	"github.com/mesosphere/kommander-applications/apptests/environment"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestListExecute(t *testing.T) {
+	env := environment.Env{}
+	ctx := context.Background()
+
+	err := env.Provision(ctx)
+	assert.NoError(t, err)
+
+	r := reloader{}
+	err = r.Execute(ctx, &env)
+	assert.NoError(t, err)
+}