Add command line interface

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..3177997
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,64 @@
+# generat3D - evaluate Daz DSON scenes and write .dbz files
+# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+#
+# 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.
+
+import contextlib
+import gzip
+import io
+import json
+import shutil
+import tempfile
+import unittest
+from pathlib import Path
+
+from generat3d.__main__ import main
+
+DATA = Path(__file__).parent / "data"
+
+
+class CliTest(unittest.TestCase):
+    def setUp(self):
+        self.tmp = tempfile.TemporaryDirectory()
+        self.dir = Path(self.tmp.name)
+        self.duf = self.dir / "scene.duf"
+        shutil.copy(DATA / "scene.duf", self.duf)
+
+    def tearDown(self):
+        self.tmp.cleanup()
+
+    def run_main(self, *args):
+        out, err = io.StringIO(), io.StringIO()
+        with contextlib.redirect_stdout(out), contextlib.redirect_stderr(err):
+            code = main(list(args))
+        return code, out.getvalue(), err.getvalue()
+
+    def test_default_output_beside_scene(self):
+        code, out, _ = self.run_main(str(self.duf), "-L", str(DATA / "lib"))
+        self.assertEqual((code, out), (0, ""))
+        doc = json.loads(gzip.decompress((self.dir / "scene.dbz").read_bytes()))
+        self.assertEqual(doc["figures"][0]["name"], "Fig")
+
+    def test_explicit_output(self):
+        target = self.dir / "other.dbz"
+        code, _, _ = self.run_main(str(self.duf), "-L", str(DATA / "lib"), "-o", str(target))
+        self.assertEqual(code, 0)
+        self.assertTrue(target.exists())
+
+    def test_error_exits_1_without_output(self):
+        code, _, err = self.run_main(str(self.duf), "-L", str(self.dir / "nope"))
+        self.assertEqual(code, 1)
+        self.assertIn("generat3d: error: library root not found", err)
+        self.assertFalse((self.dir / "scene.dbz").exists())