v0.5.3

- Мелкие исправления увеличивающие работу конвертера

tests/test_dfd.py

@@ -112,6 +112,7 @@ def test_write_dfd_outputs_uses_local_or_kroki(tmp_path):
         return True
 
     with patch("md2gost.dfd._compile_dot", return_value=(fake_dot, False)), \
+         patch("md2gost.dfd._render_dot_local_combined", return_value=set()), \
          patch("md2gost.dfd._render_dot_local", side_effect=fake_local), \
          patch("md2gost.dfd._render_dot_kroki", return_value=False):
         assert write_dfd_outputs(SAMPLE_LEVEL0, png, svg, scale=1)
@@ -119,6 +120,64 @@ def test_write_dfd_outputs_uses_local_or_kroki(tmp_path):
     assert "Клиент" in svg.read_text(encoding="utf-8")
 
 
+def test_write_dfd_outputs_one_graphviz_run_for_both_formats(tmp_path):
+    """PNG + SVG come from a single Graphviz process; no per-format retry."""
+    png = tmp_path / "a.png"
+    svg = tmp_path / "a.svg"
+    single = []
+
+    def fake_combined(dot, targets, *, context):
+        for out_path, fmt in targets:
+            Path(out_path).write_bytes(
+                b"\x89PNG\r\n\x1a\n" + b"\x00" * 32 if fmt == "png" else b"<svg/>"
+            )
+        return {fmt for _, fmt in targets}
+
+    with patch("md2gost.dfd._compile_dot", return_value=("digraph G {}", False)), \
+         patch("md2gost.dfd._render_dot_local_combined", side_effect=fake_combined), \
+         patch("md2gost.dfd._render_dot_local", side_effect=lambda *a, **k: single.append(a) or True), \
+         patch("md2gost.dfd._render_dot_kroki", return_value=False):
+        assert write_dfd_outputs(SAMPLE_LEVEL0, png, svg, scale=1)
+    assert single == []
+    assert png.read_bytes().startswith(b"\x89PNG")
+    assert svg.read_bytes().startswith(b"<svg")
+
+
+def test_write_dfd_outputs_retries_format_missed_by_combined(tmp_path):
+    """If the combined run only produced PNG, SVG still goes through the old path."""
+    png = tmp_path / "a.png"
+    svg = tmp_path / "a.svg"
+    retried = []
+
+    def fake_combined(dot, targets, *, context):
+        for out_path, fmt in targets:
+            if fmt == "png":
+                Path(out_path).write_bytes(b"\x89PNG\r\n\x1a\n" + b"\x00" * 32)
+        return {"png"}
+
+    def fake_local(dot, out_path, fmt, *, context):
+        retried.append(fmt)
+        Path(out_path).write_bytes(b"<svg/>")
+        return True
+
+    with patch("md2gost.dfd._compile_dot", return_value=("digraph G {}", False)), \
+         patch("md2gost.dfd._render_dot_local_combined", side_effect=fake_combined), \
+         patch("md2gost.dfd._render_dot_local", side_effect=fake_local), \
+         patch("md2gost.dfd._render_dot_kroki", return_value=False):
+        assert write_dfd_outputs(SAMPLE_LEVEL0, png, svg, scale=1)
+    assert retried == ["svg"]
+    assert svg.read_bytes().startswith(b"<svg")
+
+
+def test_render_dot_local_combined_single_target_is_noop():
+    from md2gost.dfd import _render_dot_local_combined
+
+    with patch("md2gost.dfd.resolve_graphviz_engine") as resolve:
+        assert _render_dot_local_combined("digraph G {}", [(Path("a.png"), "png")],
+                                          context=False) == set()
+    resolve.assert_not_called()
+
+
 def test_write_dfd_outputs_falls_back_to_kroki(tmp_path):
     png = tmp_path / "a.png"