Function TEST

tests/exp_update_test.cpp:25–119

namespace {

TEST(UpdateLazy, Basic) {
  struct UpdateJsonTest {
    std::string target;
    std::string source;
    std::string updated;
  };
  std::vector<UpdateJsonTest> tests = {
      {
          .target = "null",
          .source = "123",
          .updated = "123",
      },
      {
          .target = "[]",
          .source = R"({"a":1})",
          .updated = R"({"a":1})",
      },
      {
          .target = "[1,2,3]",
          .source = R"([4,5,6])",
          .updated = R"([4,5,6])",
      },
      {
          .target = R"({"a":2})",
          .source = R"({"a":1})",
          .updated = R"({"a":1})",
      },
      {
          .target = R"({"a":{"b":0}})",
          .source = R"({"a":{"b":1}})",
          .updated = R"({"a":{"b":1}})",
      },
      {
          .target = R"({"a":{"b":0}})",
          .source = R"({"a":{"c":1}})",
          .updated = R"({"a":{"b":0,"c":1}})",
      },
      {
          .target = R"({"a":{"b":0,"c":0}})",
          .source = R"({"a":{"c":1}})",
          .updated = R"({"a":{"b":0,"c":1}})",
      },
      {
          .target = R"({"a":{"b":0,"c":0,"d":0}})",
          .source = R"({"a":{"c":1}})",
          .updated = R"({"a":{"b":0,"c":1,"d":0}})",
      },
      {
          .target = R"({"b":0,"c":0,"d":0})",
          .source = R"({"c":1})",
          .updated = R"({"b":0,"c":1,"d":0})",
      },
      {
          .target = R"({"a":{"b":0, "c":0,"d":0}})",
          .source = R"({"a":{"d":1}})",
          .updated = R"({"a":{"b":0,"c":0,"d":1}})",
      },
      {