Fix travis CI build issues

Dockerfile: Change python version

Changed python version to 3.6 to make it
compatible to igitt.

setup.cfg: Correct doc-test cli parameter

Added a missing 's' to the doc-test cli parameter

wolfram_alpha.py: Remove unused code

Removed try-except section which
was not called and added new log

wolfram_alpha_test.py: Change assert

Changed assert statement according to new
log in wolfram_alpha.py

test-requirements: Update pytest-cov version

Changed pytest-cov version to be less than 2.9
to solve dependency conflicts

Fixes #667

Author: codehobbyist06

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3-alpine
+FROM python:3.6-alpine
 
 ENV BOT_ROOT=/opt/errbot
 

plugins/wolfram_alpha.py

@@ -24,11 +24,10 @@ def wa(self, msg, arg):
         """
         ans = ''
         res = self.client.query(arg)
-        try:
-            for pod in res.pods:
-                if pod.title in ['Result', 'Results']:
-                    for sub in pod.subpods:
-                        ans += sub.plaintext
-        except AttributeError:
-            self.log.info('KeyError triggered on retrieving pods.')
+        for pod in res.pods:
+            if pod.title in ['Result', 'Results']:
+                for sub in pod.subpods:
+                    ans += sub.plaintext
+        if ans == '':
+            self.log.info("No results found!")
         return ans if ans else 'Dunno :('

setup.cfg

@@ -18,7 +18,7 @@ addopts =
   -p no:logging
   --color=yes
   --doctest-glob=*.rst
-  --doctest-ignore-import-error
+  --doctest-ignore-import-errors
   --error-for-skips
   --cov
   --instafail

test-requirements.txt

@@ -13,7 +13,7 @@ codecov~=2.0.5
 moban~=0.3.3 ; python_version > '3.0'
 packaging~=16.8
 pytest~=3.6.4
-pytest-cov~=2.4
+pytest-cov>=2.4,<=2.9
 pytest-env~=0.6.0
 pytest-error-for-skips~=1.0
 pytest-instafail~=0.3.0

tests/wolfram_alpha_test.py

@@ -18,7 +18,7 @@ def test_wa(self):
         with self.assertLogs() as cm:
             self.assertCommand('!wa this is a sentence',
                                'Dunno')
-        self.assertIn('INFO:errbot.plugins.WolframAlpha:KeyError triggered on '
-                      'retrieving pods.', cm.output)
+        self.assertIn('INFO:errbot.plugins.WolframAlpha:'
+                      'No results found!', cm.output)
         self.assertCommand('!plugin config WolframAlpha',
                            '{\'WA_TOKEN\': None}')