feat: register routes with name

internal/router/router_test.go

@@ -0,0 +1,24 @@
+package router_test
+
+import (
+	"net/http"
+	"testing"
+
+	"git.juancwu.dev/juancwu/budgit/internal/router"
+	"github.com/stretchr/testify/assert"
+)
+
+// TestRouter_DuplicateWildcardPanics pins a property we rely on: net/http.ServeMux
+// refuses to register a pattern that uses the same wildcard name twice. URL() in
+// the routes package leans on this guarantee to replace each key exactly once, so
+// if this ever regresses we want loud test failure, not silently wrong URLs.
+func TestRouter_DuplicateWildcardPanics(t *testing.T) {
+	r := router.New()
+	assert.PanicsWithError(
+		t,
+		`parsing "GET /here/{token}/there/{token}": at offset 24: duplicate wildcard name "token"`,
+		func() {
+			r.Get("/here/{token}/there/{token}", func(http.ResponseWriter, *http.Request) {})
+		},
+	)
+}