Function testFromStdString

Tests/CMakeLib/testString.cxx:154–165

static std::string const stdstr = "abc";

static bool testFromStdString(cm::String const& str)
{
#if defined(_GLIBCXX_USE_CXX11_ABI) && _GLIBCXX_USE_CXX11_ABI
  // It would be nice to check this everywhere, but several platforms
  // still use a CoW implementation even in C++11.
  ASSERT_TRUE(str.data() != stdstr.data());
#endif
  ASSERT_TRUE(str.size() == 3);
  ASSERT_TRUE(std::strncmp(str.data(), stdstr.data(), 3) == 0);
  ASSERT_TRUE(str.is_stable());
  return true;
}

static bool testConstructFromStdString()
{