added tests for sequence generator and table sequence pk generator

test/backends/SequenceTest.cpp

@@ -1,6 +1,7 @@
 #include "catch2/catch_test_macros.hpp"
 
 #include "matador/query/query.hpp"
+#include "matador/query/sequence_pk_generator.hpp"
 
 #include "SequenceFixture.hpp"
 
@@ -34,3 +35,27 @@ TEST_CASE_METHOD(SequenceFixture, "test create and drop sequence", "[sequence][c
     .execute(db);
   REQUIRE(result.is_ok());
 }
+
+TEST_CASE_METHOD(SequenceFixture, "Test nextval and currval through sequence pk generator", "[sequence][nextval][currval]") {
+  auto result = query::create()
+    .sequence("person_seq")
+    .execute(db);
+  REQUIRE(result.is_ok());
+
+  sequences_to_drop.emplace("person_seq");
+
+  sequence_pk_generator generator("person_seq");
+
+  auto pk_result = generator.next_id(db);
+  REQUIRE(pk_result.is_ok());
+  REQUIRE(*pk_result == 1);
+
+  pk_result = generator.current_id(db);
+  REQUIRE(pk_result.is_ok());
+  REQUIRE(*pk_result == 1);
+
+  result = query::drop()
+    .sequence("person_seq")
+    .execute(db);
+  REQUIRE(result.is_ok());
+}

test/backends/TableSequenceTest.cpp

@@ -4,6 +4,7 @@
 #include "matador/query/expression/expression_operators.hpp"
 #include "matador/query/query.hpp"
 #include "matador/query/table_column.hpp"
+#include "matador/query/table_pk_generator.hpp"
 
 #include "TableSequenceFixture.hpp"
 
@@ -37,4 +38,24 @@ TEST_CASE_METHOD(TableSequenceFixture, "test create and drop table sequence", "[
   REQUIRE(id_result);
   REQUIRE(id_result->has_value());
   REQUIRE(id_result->value() == 2);
+}
+
+TEST_CASE_METHOD(TableSequenceFixture, "Test nextval and currval through table sequence pk generator", "[table_sequence][nextval][currval]" ) {
+  const auto next_id_col = "next_id"_col;
+  auto result = query::query::insert()
+    .into(sequence_table_name, { "name", next_id_col})
+    .values({ "test_seq", 1 })
+    .execute(db);
+  REQUIRE(result);
+  REQUIRE(result->affected_rows == 1);
+
+  table_pk_generator generator(sequence_table_name, "test_seq");
+
+  auto pk_result = generator.next_id(db);
+  REQUIRE(pk_result.is_ok());
+  REQUIRE(*pk_result == 1);
+
+  pk_result = generator.current_id(db);
+  REQUIRE(pk_result.is_ok());
+  REQUIRE(*pk_result == 2);
 }