Add test case for Type3 fonts with no Unicode mapping

tests/resources/README.rst

@@ -149,6 +149,11 @@ licensed under the specified license.
         - @jbarlow83
         - @jbarlow83
         - CC-BY-SA 4.0
+    *   - type3_font_nomapping.pdf
+        - example of a PDF with an embedded subsetted TrueType font with no Unicode mapping
+        - @jbarlow83
+        - @jbarlow83
+        - CC-BY-SA 4.0
     *   - vector.pdf
         - a PDF with vector art and text rendered as curves with no fonts
         - @Catscratch

tests/test_pdfinfo.py

@@ -185,8 +185,11 @@ def test_ocr_detection(resources):
     assert pdf[0].has_text
 
 
-def test_corrupt_font_detection(resources):
-    filename = resources / 'truetype_font_nomapping.pdf'
+@pytest.mark.parametrize(
+    'testfile', ('truetype_font_nomapping.pdf', 'type3_font_nomapping.pdf')
+)
+def test_corrupt_font_detection(resources, testfile):
+    filename = resources / testfile
     with pytest.raises(NotImplementedError):
         pdf = pdfinfo.PdfInfo(filename)
         pdf[0].has_corrupt_text