Update test_toml_file.py

Author: DimmaDont

tests/test_toml_file.py

@@ -105,3 +105,12 @@ def test_default_eol_is_os_linesep(tmpdir):
     linesep = os.linesep.encode()
     with open(toml_path, "rb") as f:
         assert f.read() == b"a = 1" + linesep + b"b = 2" + linesep
+
+def test_readwrite_eol_windows(tmpdir):
+    toml_path = str(tmpdir / "pyproject.toml")
+    doc = TOMLDocument()
+    doc.add("a", 1)
+    f = TOMLFile(toml_path)
+    f.write(doc)
+    readback = f.read()
+    assert doc.as_string() == readback.as_string()