package api

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
)

func TestError(t *testing.T) {
	gin.SetMode(gin.TestMode)
	router := gin.New()
	router.GET("/error", func(c *gin.Context) {
		Error(c, http.StatusBadRequest, "invalid request")
	})

	req := httptest.NewRequest(http.MethodGet, "/error", nil)
	rec := httptest.NewRecorder()

	router.ServeHTTP(rec, req)

	if rec.Code != http.StatusBadRequest {
		t.Fatalf("status = %d, want %d", rec.Code, http.StatusBadRequest)
	}

	var body ErrorResponse
	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
		t.Fatalf("unmarshal response: %v", err)
	}

	if body.Error.Message != "invalid request" {
		t.Errorf("message = %q, want %q", body.Error.Message, "invalid request")
	}
}