Demonstrate a parsing error w/ EOL w/ empty line

Ref: PyCQA/redbaron#186

Author: webknjaz

tests/test_regression.py

@@ -1,4 +1,6 @@
-from baron import parse, dumps
+import pytest
+
+from baron import parse, parser, dumps
 
 
 def test_regression_trailing_comment_after_colon():
@@ -22,3 +24,25 @@ def test_regression_trailing_comment_after_colon_no_space_dump():
 def test_comment_in_middle_of_ifelseblock():
     code = 'if a:\n    pass\n# comment\nelse:\n    pass\n'
     assert dumps(parse(code)) == code
+
+
+@pytest.mark.parametrize(
+    'code',
+    (
+        'sss = "some str"\\\n# some comment\nprint(sss)',
+        'sss = "some str"\\\n\nprint(sss)',
+    ),
+)
+def test_eol_esc_no_continuation(code):
+    """Test that parser reads escaped EOL continuation w/ empty line."""
+    assert dumps(parse(code)) == code
+
+
+def test_eol_esc_invalid_continuation():
+    """Test that illegal escaped EOL continuation raises an error."""
+    code = 'sss = "some str"\\\nprint(sss)'
+    with pytest.raises(
+            parser.ParsingError,
+            match='Error, got an unexpected token SPACE here:',
+    ):
+        parse(code)