Added the test infrastructure for postgres

include/sqlgen/postgres/Connection.hpp

@@ -23,7 +23,7 @@ class Connection : public sqlgen::Connection {
 
  public:
   Connection(const Credentials& _credentials)
-      : credentials_(_credentials), conn_(make_conn(_credentials.to_str())) {}
+      : conn_(make_conn(_credentials.to_str())), credentials_(_credentials) {}
 
   static rfl::Result<Ref<sqlgen::Connection>> make(
       const Credentials& _credentials) noexcept;

tests/CMakeLists.txt

@@ -23,6 +23,10 @@ target_link_libraries(
 find_package(GTest)
 gtest_discover_tests(sqlgen-tests)
 
+if(SQLGEN_POSTGRES)
+    add_subdirectory(postgres)
+endif()
+
 if(SQLGEN_SQLITE3)
     add_subdirectory(sqlite)
 endif()

tests/postgres/CMakeLists.txt

@@ -0,0 +1,19 @@
+project(sqlgen-postgres-tests)
+
+file(GLOB_RECURSE SOURCES CONFIGURE_DEPENDS "*.cpp")
+
+add_executable(
+    sqlgen-postgres-tests 
+    ${SOURCES}
+)
+target_precompile_headers(sqlgen-postgres-tests PRIVATE [["sqlgen.hpp"]] <iostream> <string> <functional> <gtest/gtest.h>)
+
+
+target_link_libraries(
+    sqlgen-postgres-tests
+    PRIVATE 
+    "${SQLGEN_GTEST_LIB}"
+)
+
+find_package(GTest)
+gtest_discover_tests(sqlgen-postgres-tests)

tests/postgres/test_to_select_from.cpp

@@ -0,0 +1,25 @@
+#include <gtest/gtest.h>
+
+#include <sqlgen.hpp>
+#include <sqlgen/postgres.hpp>
+#include <sqlgen/transpilation/to_select_from.hpp>
+
+namespace test_to_select_from {
+
+struct TestTable {
+  std::string field1;
+  int32_t field2;
+  sqlgen::PrimaryKey<uint32_t> id;
+  std::optional<std::string> nullable;
+};
+
+TEST(postgres, test_to_select_from) {
+  /*const auto select_from_stmt =
+      sqlgen::transpilation::to_select_from<TestTable>();
+  const auto conn = sqlgen::postgres::connect().value();
+  const auto expected =
+      R"(SELECT "field1", "field2", "id", "nullable" FROM "TestTable";)";
+
+  EXPECT_EQ(conn->to_sql(select_from_stmt), expected);*/
+}
+}  // namespace test_to_select_from