fix bug in svn segment

Dockerfile

@@ -9,7 +9,8 @@ RUN apk add --no-cache --update \
       git \
       mercurial \
       php5 \
-      subversion && \
+      subversion \
+      && \
     rm -rf /var/cache/apk/*
 
 RUN mkdir /code
@@ -22,7 +23,9 @@ RUN bzr whoami "root <root@example.com>" && \
     git config --global user.email "root@example.com" && \
     git config --global user.name "root"
 
-COPY . ./
-RUN ./setup.py install
+# COPY . ./
+# RUN ./setup.py install
 
 ENV USER root
+
+CMD ["nosetests"]

powerline_shell/segments/svn.py

@@ -39,7 +39,7 @@ def build_stats():
                              env=get_subprocess_env())
     except OSError:
         # Popen will throw an OSError if svn is not found
-        return None
+        return None, None
     pdata = p.communicate()
     if p.returncode != 0 or pdata[1][:22] == b'svn: warning: W155007:':
         return None, None

test.sh

@@ -1,4 +1,6 @@
 #!/bin/sh
 set -eu
 docker build -t powerline-shell .
-docker run --rm -it powerline-shell nosetests "$@"
+docker run --rm --interactive --tty \
+    --volume $PWD:/code \
+    powerline-shell "$@"

test/segments_test/svn_test.py

@@ -0,0 +1,32 @@
+import tempfile
+import unittest
+import shutil
+import mock
+import sh
+import powerline_shell.segments.svn as svn
+from ..testing_utils import dict_side_effect_fn
+
+
+class SvnTest(unittest.TestCase):
+
+    def setUp(self):
+        self.powerline = mock.MagicMock()
+        self.powerline.segment_conf.side_effect = dict_side_effect_fn({
+            ("vcs", "show_symbol"): False,
+        })
+
+        self.dirname = tempfile.mkdtemp()
+        sh.cd(self.dirname)
+        # sh.svn("init", ".")
+
+        self.segment = svn.Segment(self.powerline, {})
+
+    def tearDown(self):
+        shutil.rmtree(self.dirname)
+
+    @mock.patch("powerline_shell.utils.get_PATH")
+    def test_svn_not_installed(self, get_PATH):
+        get_PATH.return_value = "" # so svn can't be found
+        self.segment.start()
+        self.segment.add_to_powerline()
+        self.assertEqual(self.powerline.append.call_count, 0)