test: Add a test to SDK GetGroup using a mock http server

internal/sdk/cloudian/sdk_test.go

@@ -1,16 +1,71 @@
 package cloudian
 
 import (
+	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"math/rand"
+	"net/http"
+	"net/http/httptest"
 	"reflect"
 	"strings"
 	"testing"
 	"testing/quick"
 )
 
+func TestGetGroup(t *testing.T) {
+	// Create a mock server
+	mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(`{
+			"active": "true",
+			"groupId": "QA",
+			"groupName": "Quality Assurance Group",
+			"ldapEnabled": false,
+			"ldapGroup": "",
+			"ldapMatchAttribute": "",
+			"ldapSearch": "",
+			"ldapSearchUserBase": "",
+			"ldapServerURL": "",
+			"ldapUserDNTemplate": "",
+			"s3endpointshttp": ["ALL"],
+			"s3endpointshttps": ["ALL"],
+			"s3websiteendpoints": ["ALL"]
+			}`))
+	}))
+	defer mockServer.Close()
+
+	mockClient := &http.Client{}
+
+	req, err := http.NewRequestWithContext(context.TODO(), http.MethodGet, mockServer.URL, nil)
+	if err != nil {
+		t.Fatalf("Failed to create request: %v", err)
+	}
+
+	resp, err := mockClient.Do(req)
+	if err != nil {
+		t.Fatalf("Failed to send request: %v", err)
+	}
+	defer resp.Body.Close()
+
+	cloudianClient := Client{
+		baseURL:    mockServer.URL,
+		httpClient: mockClient,
+		authHeader: "",
+	}
+
+	group, err := cloudianClient.GetGroup(context.TODO(), "QA")
+
+	if err != nil {
+		t.Errorf("Error getting group: %v", err)
+	}
+
+	if group.GroupID != "QA" {
+		t.Errorf("Expected QA, got %v", group.GroupID)
+	}
+}
+
 func TestRealisticGroupSerialization(t *testing.T) {
 	jsonString := `{
 			"active": "true",