Add field type migration test

data/mods/TEST_DATA/field_type_migrations.json

@@ -0,0 +1,7 @@
+[
+  {
+    "type": "field_type_migration",
+    "from_field": "test_fd_migration_old_id",
+    "to_field": "test_fd_migration_new_id"
+  }
+]

data/mods/TEST_DATA/fields.json

@@ -64,5 +64,10 @@
     "display_items": false,
     "display_field": true,
     "looks_like": "fd_fog"
+  },
+  {
+    "id": "test_fd_migration_new_id",
+    "type": "field_type",
+    "intensity_levels": [ { "name": "migrated" } ]
   }
 ]

tests/submap_load_test.cpp

@@ -27,6 +27,8 @@
 static const construction_str_id construction_constr_ground_cable( "constr_ground_cable" );
 static const construction_str_id construction_constr_rack_coat( "constr_rack_coat" );
 
+static const field_type_str_id field_test_fd_migration_new_id( "test_fd_migration_new_id" );
+
 static const furn_str_id furn_f_bookcase( "f_bookcase" );
 static const furn_str_id furn_f_coffin_c( "f_coffin_c" );
 static const furn_str_id furn_f_crate_o( "f_crate_o" );
@@ -781,7 +783,7 @@ static std::string submap_cosmetic_ss(
     "  \"computers\": [ ]\n"
     "}\n"
 );
-static std::string submap_pre_migration_ss(
+static std::string submap_ter_furn_pre_migration_ss(
     "{\n"
     "  \"version\": 32,\n"
     "  \"coordinates\": [ 0, 0, 0 ],\n"
@@ -804,6 +806,25 @@ static std::string submap_pre_migration_ss(
     "  \"computers\": [ ]\n"
     "}\n"
 );
+static std::string submap_fd_pre_migration_ss(
+    "{\n"
+    "  \"version\": 32,\n"
+    "  \"coordinates\": [ 0, 0, 0 ],\n"
+    "  \"turn_last_touched\": 0,\n"
+    "  \"temperature\": 0,\n"
+    "  \"terrain\": [ [ \"t_dirt\", 144 ] ],\n"
+    "  \"radiation\": [ 0, 144 ],\n"
+    "  \"furniture\": [ ],\n"
+    "  \"items\": [ ],\n"
+    "  \"traps\": [ ],\n"
+    "  \"fields\": [ 0, 0, [ \"test_fd_migration_old_id\", 1, 1997 ] ],\n"
+    "  \"cosmetics\": [ ],\n"
+    "  \"spawns\": [ ],\n"
+    "  \"vehicles\": [ ],\n"
+    "  \"partial_constructions\": [ ],\n"
+    "  \"computers\": [ ]\n"
+    "}\n"
+);
 
 static_assert( SEEX == 12, "Reminder to update submap tests when SEEX changes." );
 static_assert( SEEY == 12, "Reminder to update submap tests when SEEY changes." );
@@ -823,7 +844,9 @@ static JsonValue submap_vehicle = json_loader::from_string( submap_vehicle_ss );
 static JsonValue submap_construction = json_loader::from_string( submap_construction_ss );
 static JsonValue submap_computer = json_loader::from_string( submap_computer_ss );
 static JsonValue submap_cosmetic = json_loader::from_string( submap_cosmetic_ss );
-static JsonValue submap_pre_migration = json_loader::from_string( submap_pre_migration_ss );
+static JsonValue submap_ter_furn_pre_migration = json_loader::from_string(
+            submap_ter_furn_pre_migration_ss );
+static JsonValue submap_fd_pre_migration = json_loader::from_string( submap_fd_pre_migration_ss );
 
 static void load_from_jsin( submap &sm, const JsonValue &jsin )
 {
@@ -1448,7 +1471,7 @@ TEST_CASE( "submap_computer_load", "[submap][load]" )
 TEST_CASE( "submap_ter_furn_migration", "[submap][load]" )
 {
     submap sm;
-    load_from_jsin( sm, submap_pre_migration );
+    load_from_jsin( sm, submap_ter_furn_pre_migration );
     submap_checks checks;
     checks.terrain = false;
     checks.furniture = false;
@@ -1487,3 +1510,30 @@ TEST_CASE( "submap_ter_furn_migration", "[submap][load]" )
     REQUIRE( furn_sw == furn_test_f_migration_new_id );
     REQUIRE( furn_se == furn_test_f_migration_new_id );
 }
+
+TEST_CASE( "submap_fd_migration", "[submap][load]" )
+{
+    submap sm;
+    load_from_jsin( sm, submap_fd_pre_migration );
+    submap_checks checks;
+    checks.fields = false;
+
+    REQUIRE( is_normal_submap( sm, checks ) );
+
+    const field field_ne = sm.get_field( corner_ne );
+
+    // North east corner should have migrated from test_fd_migration_old_id to test_fd_migration_new_id
+    std::string fields_list;
+    bool found_field_new_id = false;
+    int total_fields = 0;
+    auto it = field_ne.begin();
+    while( it != field_ne.end() ) {
+        const field_type_id &type = it->first;
+        fields_list += type.id().str() + " ";
+        found_field_new_id |= type == field_test_fd_migration_new_id;
+        total_fields++;
+        it++;
+    }
+    INFO( string_format( "%d fields found: %s", total_fields, fields_list ) );
+    REQUIRE( ( found_field_new_id && total_fields == 1 ) );
+}