Ignore img tags without alt nor src in markdown writer

2 files changed, 11 insertions, 1 deletions

diff --git a/mammoth/writers/markdown.py b/mammoth/writers/markdown.py
index 5e3cf00..0183423 100644
--- a/mammoth/writers/markdown.py
+++ b/mammoth/writers/markdown.py
@@ -37,7 +37,10 @@ def _hyperlink(attributes):
 def _image(attributes):
     src = attributes.get("src", "")
     alt_text = attributes.get("alt", "")
-    return _WriterOutput("![{0}]({1})".format(alt_text, src), "")
+    if src or alt_text:
+        return _WriterOutput("![{0}]({1})".format(alt_text, src), "")
+    else:
+        return _default_output
 
 
 def _init_writers():
diff --git a/tests/writers/markdown_tests.py b/tests/writers/markdown_tests.py
index f0e4ba0..e013c7c 100644
--- a/tests/writers/markdown_tests.py
+++ b/tests/writers/markdown_tests.py
@@ -131,6 +131,13 @@ def images_are_written_even_if_they_dont_have_a_src_attribute():
     writer = _create_writer()
     writer.self_closing("img", {"alt": "Alt Text"})
     assert_equal("![Alt Text]()", writer.as_string())
+    
+
+@istest
+def image_elements_are_ignored_if_they_have_no_src_and_no_alt_text():
+    writer = _create_writer()
+    writer.self_closing("img")
+    assert_equal("", writer.as_string())
 
 
 def _create_writer():