test_web: add 'config parse' test

[joshmoore]

see: ome/omero-py#130 (review)

config parse requires web settings to be present. Adding a test to this repo. This test will fail if the UTF-8 settings of the docker are removed:

git diff Dockerfile
diff --git a/Dockerfile b/Dockerfile
index 30b1ea494..740db5a77 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM centos:centos7
-RUN localedef -i en_US -f UTF-8 en_US.UTF-8
-ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en' LC_ALL='en_US.UTF-8'
+#RUN localedef -i en_US -f UTF-8 en_US.UTF-8
+#ENV LANG='en_US.UTF-8' LANGUAGE='en_US:en' LC_ALL='en_US.UTF-8'

or if the environment variables are removed in tox:

git diff tox.ini
diff --git a/tox.ini b/tox.ini
index 1b8e87453..ef20fa3e6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py36
+envlist = py27, py36-{utf8,c}
 # https://tox.readthedocs.io/en/latest/config.html#conf-requires
 # Ensure pip is new so we can install manylinux wheel
 requires = pip >= 19.0.0
@@ -24,6 +25,8 @@ setenv =
     OMERO_HOME = {toxinidir}
     DJANGO_SETTINGS_MODULE = omeroweb.settings
     PYTHONPATH = {toxinidir}
+    c: LANG=c
+    c: LC_ALL=c
 passenv =
     ICE_CONFIG
     PIP_CACHE_DIR

[joshmoore]

This depends on ome/omero-py#130

[joshmoore]

py2 is failing at https://travis-ci.org/ome/omero-web/builds/617815427#L4037 with:

>                       properties += "%s\n" % (line)
E                       UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 23: ordinal not in range(128)
.tox/py27/lib/python2.7/site-packages/omero/install/config_parser.py:417: UnicodeDecodeError

I fixed this for ome/omero-documentation#2035 by migrating to Python 3.

[joshmoore]

I opened a PR linking back to the root issue here: ome/omero-py#142 Merging.