Fix crash on variant without reference (thx Ivar)

git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/trunk@418 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1

mutalyzer/variantchecker.py

@@ -1478,6 +1478,10 @@ def check_variant(description, output):
     else:
         record_id = parsed_description.RefSeqAcc
 
+    if not record_id:
+        output.addMessage(__file__, 4, 'ENOREF', 'No reference sequence given.')
+        return
+
     gene_symbol = transcript_id = ''
 
     database = Db.Cache()

tests/test_variantchecker.py

@@ -419,3 +419,10 @@ class TestVariantchecker():
         check_variant('NG_005990.1:g.1del', self.output)
         assert_equal(self.output.getIndexedOutput('genomicDescription', 0),
                      'NG_005990.1:g.1del')
+
+    def test_no_reference(self):
+        """
+        Variant description without a reference.
+        """
+        check_variant('g.244355733del', self.output)
+        assert_equal(len(self.output.getMessagesWithErrorCode('ENOREF')), 1)