fixed two problems

src/icalendar/prop.py

@@ -97,7 +97,7 @@ def to_ical(self):
     def from_ical(ical):
         try:
             return base64.b64decode(ical)
-        except UnicodeError:
+        except (ValueError, UnicodeError):
             raise ValueError('Not valid base 64 encoding.')
 
     def __eq__(self, other):

src/icalendar/tests/prop/test_vBinary.py

@@ -1,4 +1,6 @@
 """Test vBinary"""
+import pytest
+
 from icalendar import vBinary
 from icalendar.parser import Parameters
 
@@ -27,3 +29,13 @@ def test_long_data():
     txt_ical = b'YWFh' * 33
     assert (vBinary(txt).to_ical() == txt_ical)
     assert (vBinary.from_ical(txt_ical) == txt)
+
+def test_repr():
+    instance = vBinary("value")
+    assert repr(instance) == "vBinary('b'dmFsdWU='')"
+
+def test_from_ical():
+    with pytest.raises(ValueError, match='Not valid base 64 encoding.'):
+        vBinary.from_ical("value")
+    with pytest.raises(ValueError, match='Not valid base 64 encoding.'):
+        vBinary.from_ical("áèਮ")