Regression test for #1819

(cherry picked from commit 50fdc5d)

tests/bugfixes/github/test_issue_1819.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+
+from system_tests import CaseMeta, CopyTmpFiles, path, check_no_ASAN_UBSAN_errors
+
+class EmptyStringXmpTextValueRead(metaclass=CaseMeta):
+    """
+    Regression test for the bug described in:
+    https://github.com/Exiv2/exiv2/issues/1819
+    """
+    url = "https://github.com/Exiv2/exiv2/issues/1819"
+
+    filename = path("$data_path/issue_1819_poc.exv")
+    commands = ["$exiv2 -q $filename"]
+    stdout = ["""File name       : $filename
+File size       : 1088 Bytes
+MIME type       : application/rdf+xml
+Image size      : 0 x 0
+Thumbnail       : None
+Camera make     : 
+Camera model    : 
+Image timestamp : 
+File number     : 
+Exposure time   : 
+Aperture        : 
+Exposure bias   : 
+Flash           : 
+Flash bias      : 
+Focal length    : 
+Subject distance: 
+ISO speed       : 
+Exposure mode   : 
+Metering mode   : 
+Macro mode      : 
+Image quality   : 
+White balance   : 
+Copyright       : 
+Exif comment    : 
+
+"""]
+    stderr = [""]
+    retval = [0]