initial matador ng commit

test/backends/QueryFixture.cpp

@@ -0,0 +1,52 @@
+#include "QueryFixture.hpp"
+
+#include "matador/sql/query.hpp"
+
+#include "catch2/catch_test_macros.hpp"
+
+namespace matador::test {
+
+QueryFixture::QueryFixture()
+  : db(connection::dns)
+  , schema(db.dialect().default_schema_name())
+{
+  db.open();
+}
+
+QueryFixture::~QueryFixture() {
+    while (!tables_to_drop.empty()) {
+        drop_table_if_exists(tables_to_drop.top());
+        tables_to_drop.pop();
+    }
+}
+
+void QueryFixture::check_table_exists(const std::string &table_name) const
+{
+  auto result = db.exists(table_name);
+  REQUIRE(result.is_ok());
+  REQUIRE(*result);
+}
+
+void QueryFixture::check_table_not_exists(const std::string &table_name) const
+{
+  auto result = db.exists(table_name);
+  REQUIRE(result.is_ok());
+  REQUIRE(!*result);
+}
+
+void QueryFixture::drop_table_if_exists(const std::string &table_name) const {
+  const auto result = db.exists(table_name).and_then([&table_name, this](bool exists) {
+    if (exists) {
+      if (sql::query::drop()
+      .table(table_name)
+      .execute(db).is_ok()) {
+        this->check_table_not_exists(table_name);
+      } else {
+        FAIL("Failed to drop table");
+      }
+    }
+    return utils::ok(true);
+  });
+}
+
+}