Add unit tests for configuration utility

pkg/util/configuration/configuration_test.go

@@ -0,0 +1,153 @@
+/*
+Copyright 2022 The Kruise Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package configuration
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/openkruise/rollouts/pkg/util"
+	"github.com/stretchr/testify/assert"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/client/fake"
+)
+
+func TestGetTrafficRoutingIngressLuaScript(t *testing.T) {
+	os.Setenv("POD_NAMESPACE", "kruise-rollout")
+	defer os.Unsetenv("POD_NAMESPACE")
+
+	cases := []struct {
+		name           string
+		ingressType    string
+		existingCM     *corev1.ConfigMap
+		expectedScript string
+		expectErr      bool
+	}{
+		{
+			name:           "ConfigMap not found",
+			ingressType:    "nginx",
+			existingCM:     nil,
+			expectedScript: "",
+			expectErr:      false,
+		},
+		{
+			name:        "ConfigMap exists but key not found",
+			ingressType: "nginx",
+			existingCM: &corev1.ConfigMap{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: util.GetRolloutNamespace(),
+					Name:      RolloutConfigurationName,
+				},
+				Data: map[string]string{
+					"another-key": "another-value",
+				},
+			},
+			expectedScript: "",
+			expectErr:      false,
+		},
+		{
+			name:        "Successfully retrieve Lua script",
+			ingressType: "nginx",
+			existingCM: &corev1.ConfigMap{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: util.GetRolloutNamespace(),
+					Name:      RolloutConfigurationName,
+				},
+				Data: map[string]string{
+					fmt.Sprintf("%s.nginx", LuaTrafficRoutingIngressTypePrefix): "return 'hello world'",
+				},
+			},
+			expectedScript: "return 'hello world'",
+			expectErr:      false,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			var cli client.Client
+			if tc.existingCM != nil {
+				cli = fake.NewClientBuilder().WithRuntimeObjects(tc.existingCM).Build()
+			} else {
+				cli = fake.NewClientBuilder().Build()
+			}
+
+			script, err := GetTrafficRoutingIngressLuaScript(cli, tc.ingressType)
+			if tc.expectErr {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tc.expectedScript, script)
+			}
+		})
+	}
+}
+
+func TestGetRolloutConfiguration(t *testing.T) {
+	os.Setenv("POD_NAMESPACE", "kruise-rollout")
+	defer os.Unsetenv("POD_NAMESPACE")
+
+	cases := []struct {
+		name         string
+		existingCM   *corev1.ConfigMap
+		expectedData map[string]string
+		expectErr    bool
+	}{
+		{
+			name:         "ConfigMap not found",
+			existingCM:   nil,
+			expectedData: nil,
+			expectErr:    false,
+		},
+		{
+			name: "Successfully retrieve ConfigMap data",
+			existingCM: &corev1.ConfigMap{
+				ObjectMeta: metav1.ObjectMeta{
+					Namespace: util.GetRolloutNamespace(),
+					Name:      RolloutConfigurationName,
+				},
+				Data: map[string]string{
+					"key1": "value1",
+				},
+			},
+			expectedData: map[string]string{
+				"key1": "value1",
+			},
+			expectErr: false,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			var cli client.Client
+			if tc.existingCM != nil {
+				cli = fake.NewClientBuilder().WithRuntimeObjects(tc.existingCM).Build()
+			} else {
+				cli = fake.NewClientBuilder().Build()
+			}
+			data, err := getRolloutConfiguration(cli)
+			if tc.expectErr {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tc.expectedData, data)
+			}
+		})
+	}
+}