refactor and organize code

internal/net/gphttp/middleware/middleware_test.go

@@ -0,0 +1,37 @@
+package middleware
+
+import (
+	"net/http"
+	"strconv"
+	"strings"
+	"testing"
+
+	. "github.com/yusing/go-proxy/internal/utils/testing"
+)
+
+type testPriority struct {
+	Value int `json:"value"`
+}
+
+var test = NewMiddleware[testPriority]()
+
+func (t testPriority) before(w http.ResponseWriter, r *http.Request) bool {
+	w.Header().Add("Test-Value", strconv.Itoa(t.Value))
+	return true
+}
+
+func TestMiddlewarePriority(t *testing.T) {
+	priorities := []int{4, 7, 9, 0}
+	chain := make([]*Middleware, len(priorities))
+	for i, p := range priorities {
+		mid, err := test.New(OptionsRaw{
+			"priority": p,
+			"value":    i,
+		})
+		ExpectNoError(t, err)
+		chain[i] = mid
+	}
+	res, err := newMiddlewaresTest(chain, nil)
+	ExpectNoError(t, err)
+	ExpectEqual(t, strings.Join(res.ResponseHeaders["Test-Value"], ","), "3,0,1,2")
+}