chore: import upstream snapshot with attribution

bazel/tests/cpp/BUILD.bazel

@@ -0,0 +1,19 @@
+load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
+
+cc_library(
+    name = "example_lib",
+    srcs = ["example.cc"],
+    hdrs = ["example.h"],
+    visibility = ["//visibility:public"],
+)
+
+cc_test(
+    name = "example_test",
+    size = "small",
+    srcs = ["example_test.cc"],
+    tags = ["team:ci"],
+    deps = [
+        ":example_lib",
+        "@com_google_googletest//:gtest_main",
+    ],
+)

bazel/tests/cpp/example.cc

@@ -0,0 +1,9 @@
+#include "example.h"
+
+int SumMapValues(const std::unordered_map<int, int> &map) {
+  int sum = 0;
+  for (const auto &[_, val] : map) {
+    sum += val;
+  }
+  return sum;
+}

bazel/tests/cpp/example.h

@@ -0,0 +1,9 @@
+#ifndef __EXAMPLE_H__
+#define __EXAMPLE_H__
+
+#include <unordered_map>
+
+// Function to calculate the sum of values in an unordered_map
+int SumMapValues(const std::unordered_map<int, int> &map);
+
+#endif  // __EXAMPLE_H__

bazel/tests/cpp/example_test.cc

@@ -0,0 +1,10 @@
+#include "example.h"
+
+#include <gtest/gtest.h>
+
+#include <unordered_map>
+
+TEST(SumMapTest, HandlesEmptyMap) {
+  std::unordered_map<int, int> empty_map;
+  EXPECT_EQ(SumMapValues(empty_map), 0);
+}