implemented unit testing of log package

ctl/log/log_test.go

@@ -0,0 +1,141 @@
+/*
+ * Copyright The Kmesh 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 logs
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	testLoggerName  = "default"
+	testLoggerLevel = "debug"
+)
+
+func TestLoggerEndToEnd(t *testing.T) {
+	// Mock HTTP server for Kmesh daemon pod
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case patternLoggers:
+			if r.Method == http.MethodGet {
+				if r.URL.Query().Get("name") == "" {
+					// Get all logger names
+					loggerNames := []string{testLoggerName, "anotherLogger"}
+					json.NewEncoder(w).Encode(loggerNames)
+				} else {
+					// Get specific logger level
+					loggerInfo := LoggerInfo{
+						Name:  testLoggerName,
+						Level: testLoggerLevel,
+					}
+					json.NewEncoder(w).Encode(loggerInfo)
+				}
+			} else if r.Method == http.MethodPost {
+				// Set logger level
+				var loggerInfo LoggerInfo
+				json.NewDecoder(r.Body).Decode(&loggerInfo)
+				w.WriteHeader(http.StatusOK)
+				w.Write([]byte("Logger level updated successfully"))
+			}
+		default:
+			w.WriteHeader(http.StatusNotFound)
+		}
+	}))
+	defer server.Close()
+
+	// Mock Kubernetes port forwarding
+	utils.CreateKubeClient = func() (interface{}, error) {
+		return nil, nil
+	}
+	utils.CreateKmeshPortForwarder = func(cli interface{}, podName string) (utils.PortForwarder, error) {
+		return &mockPortForwarder{address: server.URL}, nil
+	}
+
+	// Test cases
+	t.Run("Get all loggers", func(t *testing.T) {
+		output := captureOutput(func() {
+			cmd := NewCmd()
+			cmd.SetArgs([]string{"test-pod"})
+			cmd.Execute()
+		})
+		assert.Contains(t, output, "Existing Loggers")
+		assert.Contains(t, output, testLoggerName)
+	})
+
+	t.Run("Get logger level", func(t *testing.T) {
+		output := captureOutput(func() {
+			cmd := NewCmd()
+			cmd.SetArgs([]string{"test-pod", testLoggerName})
+			cmd.Execute()
+		})
+		assert.Contains(t, output, fmt.Sprintf("Logger Name: %s", testLoggerName))
+		assert.Contains(t, output, fmt.Sprintf("Logger Level: %s", testLoggerLevel))
+	})
+
+	t.Run("Set logger level", func(t *testing.T) {
+		output := captureOutput(func() {
+			cmd := NewCmd()
+			cmd.SetArgs([]string{"test-pod", "--set", fmt.Sprintf("%s:%s", testLoggerName, testLoggerLevel)})
+			cmd.Execute()
+		})
+		assert.Contains(t, output, "Logger level updated successfully")
+	})
+
+	t.Run("Invalid set flag", func(t *testing.T) {
+		output := captureOutput(func() {
+			cmd := NewCmd()
+			cmd.SetArgs([]string{"test-pod", "--set", "invalid"})
+			cmd.Execute()
+		})
+		assert.Contains(t, output, "Invalid set flag")
+	})
+}
+
+// Helper function to capture CLI output
+func captureOutput(f func()) string {
+	var buf bytes.Buffer
+	old := os.Stdout
+	os.Stdout = &buf
+	f()
+	os.Stdout = old
+	return buf.String()
+}
+
+// Mock PortForwarder
+type mockPortForwarder struct {
+	address string
+}
+
+func (m *mockPortForwarder) Start() error {
+	return nil
+}
+
+func (m *mockPortForwarder) Close() {
+}
+
+func (m *mockPortForwarder) Address() string {
+	return m.address
+}