From df6744d85d324740bdf7307171cb3e1fda2052b5 Mon Sep 17 00:00:00 2001
From: Matthias Bussonnier <bussonniermatthias@gmail.com>
Date: Sat, 13 Dec 2014 23:07:52 +0100
Subject: [PATCH] enable test coverage on coveralls

---
 IPython/testing/iptestcontroller.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/IPython/testing/iptestcontroller.py b/IPython/testing/iptestcontroller.py
index 81da35f91..6c17bc9dd 100644
--- a/IPython/testing/iptestcontroller.py
+++ b/IPython/testing/iptestcontroller.py
@@ -636,7 +636,7 @@ def run_iptestall(options):
         print()
 
     if options.coverage:
-        from coverage import coverage
+        from coverage import coverage, CoverageException
         cov = coverage(data_file='.coverage')
         cov.combine()
         cov.save()
@@ -671,7 +671,10 @@ def run_iptestall(options):
 
         # Coverage XML report
         elif options.coverage == 'xml':
-            cov.xml_report(outfile='ipy_coverage.xml')
+            try:
+                cov.xml_report(outfile='ipy_coverage.xml')
+            except CoverageException:
+                pass
 
     if failed:
         # Ensure that our exit code indicates failure