TestCase for b1191617 and slightly more stable way to execute python in test cases.

test.py

@@ -217,10 +217,17 @@ class _VimTest(unittest.TestCase):
         self.vim.send(s)
 
     def send_py(self,s):
+        # Do not delete the file so that Vim can safely read it.
+        with tempfile.NamedTemporaryFile(
+            prefix="UltiSnips_Python",suffix=".py", delete=False
+        ) as temporary_file:
+            temporary_file.write(s)
+            temporary_file.close()
+
             if sys.version_info < (3,0):
-            self.send(":py << EOF\n%s\nEOF\n" % s)
+                self.send(":pyfile %s\n" % temporary_file.name)
             else:
-            self.send(":py3 << EOF\n%s\nEOF\n" % s)
+                self.send(":py3file %s\n" % temporary_file.name)
 
     def send_keystrokes(self,s):
         self.vim.send_keystrokes(s, self.sleeptime)
@@ -1868,6 +1875,37 @@ class RecTabStops_MirroredZeroTS_ECR(_VimTest):
     keys = "m" + EX + "m1" + EX + "one" + JF + "two" + \
             JF + "three" + JF + "four" + JF + "end"
     wanted = "[ [ one three three two ] four ]end"
+class RecTabStops_ComplexBug1191617(_PS_Base):
+    # https://bugs.launchpad.net/ultisnips/+bug/1191617
+    snippets_test_file = ("all", "test_file", r"""
+global !p
+def complete(t, opts):
+ if t:
+   opts = [ q[len(t):] for q in opts if q.startswith(t) ]
+ if len(opts) == 0:
+   return ''
+ return opts[0] if len(opts) == 1 else "(" + '|'.join(opts) + ')'
+def autocomplete_options(t, string, attr=None):
+   return complete(t[1], [opt for opt in attr if opt not in string])
+endglobal
+snippet ff "form_for" w
+form_for ${1:record}${0:, options = \{\}} do |${2:f}|
+endsnippet
+snippet /form_for(?!.*\{.*$)(.*,)/ "form_for options" rw!
+`!p
+auto = autocomplete_options(t, match.group(1), attr=["url: ", "namespace: ", "html: {"])
+snip.rv = "form_for" + match.group(1) + " "`$1`!p if (snip.c != auto) : snip.rv=auto`
+endsnippet
+snippet /form_for(.*){([^|]*)/ "form_for html options" rw!
+`!p
+auto = autocomplete_options(t, match.group(2), attr=["id: ", "class: ", "title:  "])
+snip.rv = "form_for" + match.group(1) + "{"`$1`!p if (snip.c != auto) : snip.rv=auto`
+endsnippet
+""")
+    keys = "ff" + EX + "user" + JF + "u" + JF + "," + EX + "n" + JF + \
+            "some_namespace," + EX + "h" + JF + "i" + EX + "i" + EX
+    wanted = "x a bob b y\nx a jon b y"
+
 # End: Recursive (Nested) Snippets  #}}}
 # List Snippets  {{{#
 class _ListAllSnippets(_VimTest):