use new resolveRoutePath replace path.Join && add UseIf

path_test.go

@@ -0,0 +1,99 @@
+// touka/path_test.go
+package touka
+
+import (
+	"fmt"
+	"path"
+	"strings"
+	"testing"
+)
+
+func TestResolveRoutePath(t *testing.T) {
+	// 定义一组测试用例
+	testCases := []struct {
+		basePath     string
+		relativePath string
+		expected     string
+	}{
+		// --- 基本情况 ---
+		{basePath: "/api", relativePath: "/v1", expected: "/api/v1"},
+		{basePath: "/api/", relativePath: "v1", expected: "/api/v1"},
+		{basePath: "/api", relativePath: "v1", expected: "/api/v1"},
+		{basePath: "/api/", relativePath: "/v1", expected: "/api/v1"},
+
+		// --- 尾部斜杠处理 ---
+		{basePath: "/api", relativePath: "/v1/", expected: "/api/v1/"},
+		{basePath: "/api/", relativePath: "v1/", expected: "/api/v1/"},
+		{basePath: "", relativePath: "/v1/", expected: "/v1/"},
+		{basePath: "/", relativePath: "/v1/", expected: "/v1/"},
+
+		// --- 根路径和空路径 ---
+		{basePath: "/", relativePath: "/", expected: "/"},
+		{basePath: "/api", relativePath: "/", expected: "/api/"},
+		{basePath: "/api/", relativePath: "/", expected: "/api/"},
+		{basePath: "/", relativePath: "/users", expected: "/users"},
+		{basePath: "/users", relativePath: "", expected: "/users"},
+		{basePath: "", relativePath: "/users", expected: "/users"},
+
+		// --- 路径清理测试 (由 path.Clean 处理) ---
+		{basePath: "/api/v1", relativePath: "../v2", expected: "/api/v2"},
+		{basePath: "/api/v1/", relativePath: "../v2/", expected: "/api/v2/"},
+		{basePath: "/api//v1", relativePath: "/users", expected: "/api/v1/users"},
+		{basePath: "/api/./v1", relativePath: "/users", expected: "/api/v1/users"},
+	}
+
+	for _, tc := range testCases {
+		// 使用 t.Run 为每个测试用例创建一个子测试，方便定位问题
+		testName := fmt.Sprintf("base:'%s', rel:'%s'", tc.basePath, tc.relativePath)
+		t.Run(testName, func(t *testing.T) {
+			result := resolveRoutePath(tc.basePath, tc.relativePath)
+			if result != tc.expected {
+				t.Errorf("resolveRoutePath('%s', '%s') = '%s'; want '%s'",
+					tc.basePath, tc.relativePath, result, tc.expected)
+			}
+		})
+	}
+}
+
+// 性能基准测试，用于观测优化效果
+func BenchmarkResolveRoutePath(b *testing.B) {
+	basePath := "/api/v1/some/long/path"
+	relativePath := "/users/profile/details/"
+
+	// b.N 是由 testing 包提供的循环次数
+	for i := 0; i < b.N; i++ {
+		// 在循环内调用被测试的函数
+		resolveRoutePath(basePath, relativePath)
+	}
+}
+
+// （可选）可以保留旧的实现，进行性能对比
+func resolveRoutePath_Old(basePath, relativePath string) string {
+	if relativePath == "/" {
+		if basePath != "" && basePath != "/" && !strings.HasSuffix(basePath, "/") {
+			return basePath + "/"
+		}
+		return basePath
+	}
+	finalPath := path.Clean(basePath + "/" + relativePath)
+	if strings.HasSuffix(relativePath, "/") && !strings.HasSuffix(finalPath, "/") {
+		return finalPath + "/"
+	}
+	return finalPath
+}
+
+func BenchmarkResolveRoutePath_Old(b *testing.B) {
+	basePath := "/api/v1/some/long/path"
+	relativePath := "/users/profile/details/"
+	for i := 0; i < b.N; i++ {
+		resolveRoutePath_Old(basePath, relativePath)
+	}
+}
+
+func BenchmarkJoinStd(b *testing.B) {
+	basePath := "/api/v1/some/long/path"
+	relativePath := "/users/profile/details/"
+	for i := 0; i < b.N; i++ {
+		path.Join(basePath, relativePath)
+	}
+}