chore: import upstream snapshot with attribution

test/cpp/cinn/common/is_reachable_predicator_test.cc

@@ -0,0 +1,38 @@
+// Copyright (c) 2023 CINN Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "paddle/cinn/common/is_reachable_predicator.h"
+
+#include <glog/logging.h>
+#include <gtest/gtest.h>
+
+namespace cinn {
+namespace common {
+
+TEST(IsReachablePredicator, simple) {
+  IsReachablePredicator<int> IsReachable(
+      // Get min depth
+      [](int x) { return std::abs(x); },
+      // Get max depth
+      [](int x) { return std::abs(x); },
+      // visit next node
+      [](int x, const std::function<void(int)>& Handler) {
+        Handler(x + (x / std::abs(x)));
+      });
+  EXPECT_TRUE(IsReachable(33, 99, [](int) {}));
+  EXPECT_FALSE(IsReachable(33, -99, [](int) {}));
+}
+
+}  // namespace common
+}  // namespace cinn