From bc78f4a0e9b039c3be31845ceecb7cbe0f64fa3f Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@klayout.de>
Date: Sun, 1 Sep 2024 21:26:25 +0200
Subject: [PATCH] Added test.

---
 .../gds2/unit_tests/dbGDS2ReaderTests.cc      |  21 ++++++++++++++++++
 testdata/gds/issue_1835.gds                   | Bin 0 -> 910 bytes
 testdata/gds/issue_1835_au.gds                | Bin 0 -> 660 bytes
 3 files changed, 21 insertions(+)
 create mode 100644 testdata/gds/issue_1835.gds
 create mode 100644 testdata/gds/issue_1835_au.gds

diff --git a/src/plugins/streamers/gds2/unit_tests/dbGDS2ReaderTests.cc b/src/plugins/streamers/gds2/unit_tests/dbGDS2ReaderTests.cc
index c503bab0a..f9fca1052 100644
--- a/src/plugins/streamers/gds2/unit_tests/dbGDS2ReaderTests.cc
+++ b/src/plugins/streamers/gds2/unit_tests/dbGDS2ReaderTests.cc
@@ -704,3 +704,24 @@ TEST(5_issue893)
   db::compare_layouts (_this, layout, fn_au, db::WriteGDS2, 1);
 }
 
+//  PCell saved as top cell
+TEST(6_issue1835)
+{
+  db::Manager m (false);
+  db::Layout layout (&m);
+
+  db::LoadLayoutOptions options;
+
+  {
+    tl::InputStream file (tl::testdata () + "/gds/issue_1835.gds");
+    db::Reader reader (file);
+    reader.read (layout, options);
+  }
+
+  tl_assert (layout.begin_top_down () != layout.end_top_cells ());
+  layout.convert_cell_to_static (*layout.begin_top_down ());
+
+  std::string fn_au (tl::testdata () + "/gds/issue_1835_au.gds");
+  db::compare_layouts (_this, layout, fn_au, db::WriteGDS2, 1);
+}
+
diff --git a/testdata/gds/issue_1835.gds b/testdata/gds/issue_1835.gds
new file mode 100644
index 0000000000000000000000000000000000000000..ecd49c3f1379add9c7f09267d12e2f9e623561cf
GIT binary patch
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diff --git a/testdata/gds/issue_1835_au.gds b/testdata/gds/issue_1835_au.gds
new file mode 100644
index 0000000000000000000000000000000000000000..8770350b017a47331bde24b3dd860fe9c725415c
GIT binary patch
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literal 0
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