tests(router/atc): ensure request path is normalized before extractin…

…g segments from it (#12407)

KAG-3351

spec/01-unit/08-router_spec.lua

@@ -5544,6 +5544,38 @@ do
       assert.falsy(match_t)
     end)
 
+    it("exec() should normalize uri with http.segments.*", function()
+      local use_case = {
+        {
+          service = service,
+          route   = {
+            id = "e8fb37f1-102d-461e-9c51-6608a6bb8101",
+            expression = [[http.path.segments.0 == "foo" && http.path.segments.1 == "bar" && http.path.segments.2 == "baz" && ]] ..
+                         [[http.path.segments.len == 3]],
+            priority = 100,
+          },
+        },
+      }
+
+      local router = assert(new_router(use_case))
+
+      local ctx = {}
+      local _ngx = mock_ngx("GET", "/foo/bar/baz", { a = "1", })
+      router._set_ngx(_ngx)
+
+      local match_t = router:exec(ctx)
+      assert.truthy(match_t)
+      assert.same(use_case[1].route, match_t.route)
+
+      local ctx = {}
+      local _ngx = mock_ngx("GET", "/foo//bar///baz//", { a = "1", })
+      router._set_ngx(_ngx)
+
+      local match_t = router:exec(ctx)
+      assert.truthy(match_t)
+      assert.same(use_case[1].route, match_t.route)
+    end)
+
     it("exec() should hit cache with http.segments.*", function()
       local use_case = {
         {