How to set a host on gin's test context? - unit-testing

Question

I would like to write a unit test for a controller but I keep getting a runtime error. I found out that it is due to the absence of the Host on the request, the ClientIP() method and request body. How can I set them on the test context?
Here is what I got so far. It fails on the line with Host: c.Request.Host.
Controller:
type loggingControllers struct {
LoggingService services.InterfaceLogging
}
func (l *loggingControllers) RegisterError(c *gin.Context) {
errorEvent := models.Error{
Badges: map[string]string{},
Host: c.Request.Host,
ClientIP: c.ClientIP(),
UserAgent: c.Request.UserAgent(),
Count: 1,
Timestamp: time.Now().Unix(),
}
err := json.NewDecoder(c.Request.Body).Decode(&errorEvent)
if err != nil {
utils.RespondWithError(c, http.StatusInternalServerError, err.Error())
return
}
go l.LoggingService.SaveError(errorEvent)
utils.RespondWithSuccess(c)
}
func GetLoggingControllerMock() loggingControllers {
loggingServiceMock := services.GetLoggingServiceMock()
return loggingControllers{
LoggingService: &loggingServiceMock,
}
}
Unit Test:
func TestLoggingControllers(t *testing.T) {
loggingControllers := GetLoggingControllerMock()
w := httptest.NewRecorder()
c, _ := gin.CreateTestContext(w)
loggingControllers.RegisterError(c)
}
Error Message:
--- FAIL: TestLoggingControllers (0.00s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x38 pc=0x15238ec]

Answer 1

Thanks to Adrian's comment I found the solution.
func TestLoggingControllers(t *testing.T) {
loggingControllers := GetLoggingControllerMock()
w := httptest.NewRecorder()
c, r := gin.CreateTestContext(w)
r.POST("/", loggingControllers.RegisterError)
c.Request, _ = http.NewRequest(http.MethodPost, "/", bytes.NewBuffer([]byte("{}")))
r.ServeHTTP(w, c.Request)
if w.Code != http.StatusOK {
t.Errorf("Expected status %d, got %d", http.StatusOK, w.Code)
}
}