test: add new test for lens

tests/bugfixes/github/test_pr_1688.py

@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+from system_tests import CaseMeta
+
+class Canon_EF_100_400mm_F45_56_2x(metaclass=CaseMeta):
+
+    filename = "$data_path/canon_ef_100_400mm_f4.5_5.6_2x_.exv"
+    commands = ["$exiv2 -pa -g LensType $filename"]
+
+    stdout = ["Exif.CanonCs.LensType                        Short       1  Tamron 100-400mm f/4.5-6.3 Di VC USD + 2x *OR* Canon EF 100-400mm f/4.5-5.6L IS II USM + 2x\n"]
+    stderr = [""]
+    retval = [0]
+