Function check

src/DataTypes/tests/gtest_dataTypeToAST.cpp:10–16

using namespace DB;

static void check(const std::string & type_name)
{
    auto type = DataTypeFactory::instance().get(type_name);
    auto ast = dataTypeToAST(type);
    auto new_type = DataTypeFactory::instance().get(ast);
    EXPECT_EQ(type->getName(), new_type->getName());
}

TEST(DataTypeToAST, SimpleTypes)
{