Support matching of paragraph matcher with no style

2 files changed, 26 insertions, 1 deletions

diff --git a/mammoth/conversion.py b/mammoth/conversion.py
index 4a4cf99..624f6cb 100644
--- a/mammoth/conversion.py
+++ b/mammoth/conversion.py
@@ -53,7 +53,9 @@ class DocumentConverter(object):
     def _find_html_path_for_paragraph(self, paragraph):
         for style in self._styles:
             document_matcher = style.document_matcher
-            if document_matcher.element_type == "paragraph" and document_matcher.style_name == paragraph.style_name:
+            if document_matcher.element_type == "paragraph" and (
+                    document_matcher.style_name is None or
+                    document_matcher.style_name == paragraph.style_name):
                 return style.html_path
                 
         return html_paths.path([html_paths.element("p")])
diff --git a/tests/conversion_tests.py b/tests/conversion_tests.py
index ab90eb0..d05a103 100644
--- a/tests/conversion_tests.py
+++ b/tests/conversion_tests.py
@@ -33,5 +33,28 @@ def paragraphs_are_converted_by_satisfying_matching_paths():
     assert_equal('<p class="tip">Tip</p>', result.value)
 
 
+@istest
+def default_paragraph_style_is_used_if_no_matching_style_is_found():
+    result = convert_document_element_to_html(
+        documents.paragraph(style_name="TipsParagraph", children=[
+            _run_with_text("Tip")
+        ]),
+    )
+    assert_equal('<p>Tip</p>', result.value)
+
+
+@istest
+def default_paragraph_style_is_specified_by_mapping_plain_paragraphs():
+    result = convert_document_element_to_html(
+        documents.paragraph(style_name="TipsParagraph", children=[
+            _run_with_text("Tip")
+        ]),
+        styles=[
+            style_reader.read_style("p => p.tip")
+        ]
+    )
+    assert_equal('<p class="tip">Tip</p>', result.value)
+
+
 def _run_with_text(text):
     return documents.run(children=[documents.text(text)])