Function TEST

absl/strings/internal/stringify_stream_test.cc:42–46

  }
};
TEST(StringifyStreamTest, AppendNChars) {
  std::ostringstream os;
  StringifyStream(os) << AppendNCharsTest{5, 'a'};
  EXPECT_EQ(os.str(), "aaaaa");
}

// Exercises the Append(absl::string_view) overload
struct AppendStringViewTest {