[tests] Add regression test for Tamron 70-200 G1 lens name

(cherry picked from commit e3477fc7714fe0f0b26752b65aedcb497cf5f81f)

tests/bugfixes/github/test_issue_990.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+
+from system_tests import CaseMeta, path
+
+class test_issue_990Test(metaclass=CaseMeta):
+
+    filename = path("$data_path/test_issue_990.exv")
+    commands  = ["$exiv2 -pa --grep lens/i $filename"
+                ]
+    stdout = ["""Exif.Nikon3.LensType                         Byte        1  D G VR
+Exif.Nikon3.Lens                             Rational    4  70-200mm F2.8
+Exif.Nikon3.LensFStops                       Undefined   4  7
+Exif.NikonLd3.LensIDNumber                   Byte        1  Tamron SP 70-200mm F/2.8 Di VC USD
+Exif.NikonLd3.LensFStops                     Byte        1  F7.0
+"""
+             ]
+    stderr = [""]
+    retval = [ 0]