message: tests: Add more stream coverage tests
  Cover both char and wchar_t stream loading in a single run instead of
  using pugi::char_t.
diff: @@ -237,15 +237,27 @@ TEST(document_load_stream_nonseekable_out_of_memory)
  CHECK_ALLOC_FAIL(CHECK(doc.load(in).status == status_out_of_memory));
  }
  +TEST(document_load_stream_wide_nonseekable_out_of_memory)
  +{
  + wchar_t contents[] = L"<node />";
  + char_array_buffer<wchar_t> buffer(contents, contents + sizeof(contents) / sizeof(contents[0]));
  + std::basic_istream<wchar_t> in(&buffer);
  +
  + test_runner::_memory_fail_threshold = 1;
  +
  + pugi::xml_document doc;
  + CHECK_ALLOC_FAIL(CHECK(doc.load(in).status == status_out_of_memory));
  +}
  +
  TEST(document_load_stream_nonseekable_out_of_memory_large)
  {
  - std::basic_string<pugi::char_t> str;
  - str += STR("<node>");
  - for (int i = 0; i < 10000; ++i) str += STR("<node />");
  - str += STR("</node>");
  + std::basic_string<char> str;
  + str += "<node>";
  + for (int i = 0; i < 10000; ++i) str += "<node />";
  + str += "</node>";
  - char_array_buffer<pugi::char_t> buffer(&str[0], &str[0] + str.length());
  - std::basic_istream<pugi::char_t> in(&buffer);
  + char_array_buffer<char> buffer(&str[0], &str[0] + str.length());
  + std::basic_istream<char> in(&buffer);
  test_runner::_memory_fail_threshold = 10000 * 8 * 3 / 2;
  @@ -253,13 +265,17 @@ TEST(document_load_stream_nonseekable_out_of_memory_large)
  CHECK_ALLOC_FAIL(CHECK(doc.load(in).status == status_out_of_memory));
  }
  -TEST(document_load_stream_wide_nonseekable_out_of_memory)
  +TEST(document_load_stream_wide_nonseekable_out_of_memory_large)
  {
  - wchar_t contents[] = L"<node />";
  - char_array_buffer<wchar_t> buffer(contents, contents + sizeof(contents) / sizeof(contents[0]));
  + std::basic_string<wchar_t> str;
  + str += L"<node>";
  + for (int i = 0; i < 10000; ++i) str += L"<node />";
  + str += L"</node>";
  +
  + char_array_buffer<wchar_t> buffer(&str[0], &str[0] + str.length());
  std::basic_istream<wchar_t> in(&buffer);
  - test_runner::_memory_fail_threshold = 1;
  + test_runner::_memory_fail_threshold = 10000 * 8 * 3 / 2;
  pugi::xml_document doc;
  CHECK_ALLOC_FAIL(CHECK(doc.load(in).status == status_out_of_memory));
  