Install mock on travis

.travis.yml

@@ -25,5 +25,8 @@ before_install:
     - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then sudo mkdir -p $SWBASE && sudo chown $USER $SWBASE; fi
     - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then curl https://download.calibre-ebook.com/travis/sw-osx.tar.bz2 | tar xj -C $SWBASE; fi
     - npm install --no-optional rapydscript-ng && echo $PATH && which rapydscript && rapydscript --version
+    - python $SW/bin/easy_install --user "pip==9.0.1"
+    - pip install --user -r requirements.txt
     - python setup.py bootstrap --ephemeral
+
 script: python setup.py test

appveyor.yml

@@ -4,7 +4,7 @@ os: Visual Studio 2015
 clone_folder: C:\calibre
 clone_depth: 5
 branches:
-    only: 
+    only:
     - vs2015
 
 cache:
@@ -19,7 +19,9 @@ platform:
     - x64
 
 before_build:
-    - C:\Python35-x64\python.exe setup/win-ci.py sw
+  - C:\Python35-x64\python.exe setup/win-ci.py sw
+  - C:\sw\private\python\easy_install.exe --user "pip==9.0.1"
+  - C:\sw\private\python\pip install --user -r requirements.txt
 
 build_script:
     - C:\sw\private\python\python.exe setup/win-ci.py build

requirements.txt

@@ -0,0 +1,2 @@
+# Note, this file is work-in-progress, and is partial only.
+mock==2.0.0