From 29f8e29b0bf5d50c0b735aa707d2a61623cc805b Mon Sep 17 00:00:00 2001
From: John Chilton <jmchilton@gmail.com>
Date: Fri, 29 Jun 2018 15:52:38 -0700
Subject: [PATCH] Fix empty datatypes.

---
 lib/galaxy/datatypes/proteomics.py  | 6 ++++--
 lib/galaxy/datatypes/sniff.py       | 3 +++
 lib/galaxy/datatypes/test/empty.txt | 0
 3 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 lib/galaxy/datatypes/test/empty.txt

diff --git a/lib/galaxy/datatypes/proteomics.py b/lib/galaxy/datatypes/proteomics.py
index b3de1f5a97a..4afad30d276 100644
--- a/lib/galaxy/datatypes/proteomics.py
+++ b/lib/galaxy/datatypes/proteomics.py
@@ -393,8 +393,10 @@ class Ms2(Text):
         header_lines = []
         while True:
             line = contents.readline()
-            if line is None or len(line) == 0:
-                pass
+            if not line:
+                return False
+            if line.strip() == "":
+                continue
             elif line.startswith('H\t'):
                 header_lines.append(line)
             else:
diff --git a/lib/galaxy/datatypes/sniff.py b/lib/galaxy/datatypes/sniff.py
index e89b24c3380..b0fb78fe812 100644
--- a/lib/galaxy/datatypes/sniff.py
+++ b/lib/galaxy/datatypes/sniff.py
@@ -290,6 +290,9 @@ def guess_ext(fname, sniff_order, is_binary=False):
     >>> from galaxy.datatypes.registry import example_datatype_registry_for_sample
     >>> datatypes_registry = example_datatype_registry_for_sample()
     >>> sniff_order = datatypes_registry.sniff_order
+    >>> fname = get_test_fname('empty.txt')
+    >>> guess_ext(fname, sniff_order)
+    'txt'
     >>> fname = get_test_fname('megablast_xml_parser_test1.blastxml')
     >>> guess_ext(fname, sniff_order)
     'blastxml'
diff --git a/lib/galaxy/datatypes/test/empty.txt b/lib/galaxy/datatypes/test/empty.txt
new file mode 100644
index 00000000000..e69de29bb2d