1 files changed, 129 insertions, 0 deletions
diff --git a/source/blender/io/common/intern/hierarchy_context_order_test.cc b/source/blender/io/common/intern/hierarchy_context_order_test.cc
new file mode 100644
index 00000000000..7273b92c479
--- /dev/null
+++ b/source/blender/io/common/intern/hierarchy_context_order_test.cc
@@ -0,0 +1,129 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2019 Blender Foundation.
+ * All rights reserved.
+ */
+#include "IO_abstract_hierarchy_iterator.h"
+
+#include "testing/testing.h"
+
+extern "C" {
+#include "BLI_utildefines.h"
+}
+
+namespace blender::io {
+
+namespace {
+
+Object *fake_pointer(int value)
+{
+  return static_cast<Object *>(POINTER_FROM_INT(value));
+}
+
+}  // namespace
+
+class HierarchyContextOrderTest : public testing::Test {
+};
+
+TEST_F(HierarchyContextOrderTest, ObjectPointerTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.duplicator = nullptr;
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(2);
+  ctx_b.duplicator = nullptr;
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_a < ctx_a);
+}
+
+TEST_F(HierarchyContextOrderTest, DuplicatorPointerTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.duplicator = fake_pointer(1);
+  ctx_a.export_name = "A";
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(1);
+  ctx_b.duplicator = fake_pointer(1);
+  ctx_b.export_name = "B";
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_a < ctx_a);
+}
+
+TEST_F(HierarchyContextOrderTest, ExportParentTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.export_parent = fake_pointer(1);
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(1);
+  ctx_b.export_parent = fake_pointer(2);
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_a < ctx_a);
+}
+
+TEST_F(HierarchyContextOrderTest, TransitiveTest)
+{
+  HierarchyContext ctx_a = {0};
+  ctx_a.object = fake_pointer(1);
+  ctx_a.export_parent = fake_pointer(1);
+  ctx_a.duplicator = nullptr;
+  ctx_a.export_name = "A";
+
+  HierarchyContext ctx_b = {0};
+  ctx_b.object = fake_pointer(2);
+  ctx_b.export_parent = nullptr;
+  ctx_b.duplicator = fake_pointer(1);
+  ctx_b.export_name = "B";
+
+  HierarchyContext ctx_c = {0};
+  ctx_c.object = fake_pointer(2);
+  ctx_c.export_parent = fake_pointer(2);
+  ctx_c.duplicator = fake_pointer(1);
+  ctx_c.export_name = "C";
+
+  HierarchyContext ctx_d = {0};
+  ctx_d.object = fake_pointer(2);
+  ctx_d.export_parent = fake_pointer(3);
+  ctx_d.duplicator = nullptr;
+  ctx_d.export_name = "D";
+
+  EXPECT_LT(ctx_a, ctx_b);
+  EXPECT_LT(ctx_a, ctx_c);
+  EXPECT_LT(ctx_a, ctx_d);
+  EXPECT_LT(ctx_b, ctx_c);
+  EXPECT_LT(ctx_b, ctx_d);
+  EXPECT_LT(ctx_c, ctx_d);
+
+  EXPECT_FALSE(ctx_b < ctx_a);
+  EXPECT_FALSE(ctx_c < ctx_a);
+  EXPECT_FALSE(ctx_d < ctx_a);
+  EXPECT_FALSE(ctx_c < ctx_b);
+  EXPECT_FALSE(ctx_d < ctx_b);
+  EXPECT_FALSE(ctx_d < ctx_c);
+}
+
+}  // namespace blender::io