1 files changed, 52 insertions, 0 deletions
diff --git a/chromium/base/util/ranges/functional_unittest.cc b/chromium/base/util/ranges/functional_unittest.cc
new file mode 100644
index 00000000000..c3fe5487aa7
--- /dev/null
+++ b/chromium/base/util/ranges/functional_unittest.cc
@@ -0,0 +1,52 @@
+// Copyright 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/util/ranges/functional.h"
+
+#include <vector>
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace util {
+
+TEST(RangesTest, Identity) {
+  static constexpr identity id;
+
+  std::vector<int> v;
+  EXPECT_EQ(&v, &id(v));
+
+  constexpr int arr = {0};
+  static_assert(arr == id(arr), "");
+}
+
+TEST(RangesTest, Invoke) {
+  struct S {
+    int data_member = 123;
+
+    int member_function() { return 42; }
+  };
+
+  S s;
+  EXPECT_EQ(123, invoke(&S::data_member, s));
+  EXPECT_EQ(42, invoke(&S::member_function, s));
+
+  auto add_functor = [](int i, int j) { return i + j; };
+  EXPECT_EQ(3, invoke(add_functor, 1, 2));
+}
+
+TEST(RangesTest, EqualTo) {
+  ranges::equal_to eq;
+  EXPECT_TRUE(eq(0, 0));
+  EXPECT_FALSE(eq(0, 1));
+  EXPECT_FALSE(eq(1, 0));
+}
+
+TEST(RangesTest, Less) {
+  ranges::less lt;
+  EXPECT_FALSE(lt(0, 0));
+  EXPECT_TRUE(lt(0, 1));
+  EXPECT_FALSE(lt(1, 0));
+}
+
+}  // namespace util