From 9a8bfee8b7654ee3c574009c0ff1899ef969fadf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Wilson=20J=C3=BAnior?= <wilsonpjunior@gmail.com>
Date: Tue, 23 Jan 2024 10:18:20 -0300
Subject: [PATCH] Add tests

---
 controllers/controller.go      |   4 ++
 controllers/controller_test.go | 100 +++++++++++++++++++++++++++++++++
 2 files changed, 104 insertions(+)

diff --git a/controllers/controller.go b/controllers/controller.go
index f1db206b1..cf6d8eb13 100644
--- a/controllers/controller.go
+++ b/controllers/controller.go
@@ -1336,6 +1336,10 @@ func mergeInstanceWithConfig(instance *v1alpha1.RpaasInstance, config *v1alpha1.
 		instanceConfig = instance.Spec.PlanTemplate.Config
 	}
 
+	if config == nil {
+		config = &v1alpha1.NginxConfig{}
+	}
+
 	mergedConfig, err := mergeConfig(*config, instanceConfig)
 	if err != nil {
 		return nil, err
diff --git a/controllers/controller_test.go b/controllers/controller_test.go
index d4cb700d4..153bf81b5 100644
--- a/controllers/controller_test.go
+++ b/controllers/controller_test.go
@@ -25,6 +25,7 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/intstr"
 	"k8s.io/client-go/tools/record"
+	"k8s.io/utils/pointer"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/client/fake"
@@ -399,6 +400,105 @@ func Test_mergePlans(t *testing.T) {
 	}
 }
 
+func Test_mergeInstanceWithConfig(t *testing.T) {
+	t.Parallel()
+	tests := []struct {
+		instance *v1alpha1.RpaasInstance
+		config   *v1alpha1.NginxConfig
+		expected *v1alpha1.RpaasInstance
+	}{
+		{
+			// case 0: nil config
+			instance: &v1alpha1.RpaasInstance{},
+			config:   nil,
+			expected: &v1alpha1.RpaasInstance{
+				Spec: v1alpha1.RpaasInstanceSpec{
+					PlanTemplate: &v1alpha1.RpaasPlanSpec{
+						Config: v1alpha1.NginxConfig{},
+					},
+				},
+			},
+		},
+		{
+			// case 1: empty config
+			instance: &v1alpha1.RpaasInstance{},
+			config:   &v1alpha1.NginxConfig{},
+			expected: &v1alpha1.RpaasInstance{
+				Spec: v1alpha1.RpaasInstanceSpec{
+					PlanTemplate: &v1alpha1.RpaasPlanSpec{
+						Config: v1alpha1.NginxConfig{},
+					},
+				},
+			},
+		},
+
+		{
+			// case 2: merge without conflits
+			instance: &v1alpha1.RpaasInstance{
+				Spec: v1alpha1.RpaasInstanceSpec{
+					PlanTemplate: &v1alpha1.RpaasPlanSpec{
+						Config: v1alpha1.NginxConfig{
+							User: "nobody",
+						},
+					},
+				},
+			},
+			config: &v1alpha1.NginxConfig{
+				CachePath: "/tmp/cache",
+			},
+			expected: &v1alpha1.RpaasInstance{
+				Spec: v1alpha1.RpaasInstanceSpec{
+					PlanTemplate: &v1alpha1.RpaasPlanSpec{
+						Config: v1alpha1.NginxConfig{
+							User:      "nobody",
+							CachePath: "/tmp/cache",
+						},
+					},
+				},
+			},
+		},
+		{
+			// case 3: merge with conflicts, instance have precedence
+			instance: &v1alpha1.RpaasInstance{
+				Spec: v1alpha1.RpaasInstanceSpec{
+					PlanTemplate: &v1alpha1.RpaasPlanSpec{
+						Config: v1alpha1.NginxConfig{
+							User:         "nobody",
+							CacheEnabled: pointer.Bool(false),
+						},
+					},
+				},
+			},
+			config: &v1alpha1.NginxConfig{
+				User:         "root",
+				CachePath:    "/tmp/cache",
+				CacheEnabled: pointer.Bool(true),
+				VTSEnabled:   pointer.Bool(true),
+			},
+			expected: &v1alpha1.RpaasInstance{
+				Spec: v1alpha1.RpaasInstanceSpec{
+					PlanTemplate: &v1alpha1.RpaasPlanSpec{
+						Config: v1alpha1.NginxConfig{
+							User:         "nobody",
+							CachePath:    "/tmp/cache",
+							VTSEnabled:   pointer.Bool(true),
+							CacheEnabled: pointer.Bool(false),
+						},
+					},
+				},
+			},
+		},
+	}
+
+	for i, tt := range tests {
+		t.Run(fmt.Sprintf("case_%d", i), func(t *testing.T) {
+			result, err := mergeInstanceWithConfig(tt.instance, tt.config)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}
+
 func TestReconcileRpaasInstance_getRpaasInstance(t *testing.T) {
 	t.Parallel()