Miscs improvements (Interro02)

tests/test_utils_compile.py

@@ -0,0 +1,48 @@
+import contextlib
+import io
+import subprocess
+import tempfile
+import unittest
+from pathlib import Path
+from unittest.mock import patch
+
+from copienator import utils
+
+
+class CompileToPdfTests(unittest.TestCase):
+    def test_warns_when_latex_fails_even_if_partial_pdf_exists(self):
+        with tempfile.TemporaryDirectory() as temporary:
+            output = Path(temporary) / "result.pdf"
+
+            def failed_run(*_args, **kwargs):
+                (Path(kwargs["cwd"]) / "text.pdf").write_bytes(b"partial")
+                return subprocess.CompletedProcess(
+                    args=[], returncode=1,
+                    stdout="! LaTeX Error: Something's wrong--perhaps a missing \\item.\n",
+                )
+
+            console = io.StringIO()
+            with patch.object(utils.subprocess, "run", side_effect=failed_run), \
+                    contextlib.redirect_stdout(console):
+                utils.compile_to_pdf("broken", output)
+
+            self.assertEqual(output.read_bytes(), b"partial")
+            self.assertIn("Warning: LaTeX compilation failed", console.getvalue())
+            self.assertIn("missing \\item", console.getvalue())
+
+    def test_warns_when_no_pdf_is_produced(self):
+        with tempfile.TemporaryDirectory() as temporary:
+            output = Path(temporary) / "result.pdf"
+            result = subprocess.CompletedProcess(args=[], returncode=0, stdout="")
+
+            console = io.StringIO()
+            with patch.object(utils.subprocess, "run", return_value=result), \
+                    contextlib.redirect_stdout(console):
+                utils.compile_to_pdf("valid", output)
+
+            self.assertFalse(output.exists())
+            self.assertIn("produced no PDF", console.getvalue())
+
+
+if __name__ == "__main__":
+    unittest.main()