Added mock dependency to travis, appveyor config files and noted in docs.

Author: JasperVanDenBosch

.travis.yml

@@ -88,7 +88,7 @@ before_install:
     - source venv/bin/activate
     - python --version # just to check
     - pip install -U pip wheel  # upgrade to latest pip find 3.5 wheels; wheel to avoid errors
-    - retry pip install nose flake8  # always
+    - retry pip install nose flake8 mock  # always
     - wheelhouse_pip_install $EXTRA_PIP_FLAGS $DEPENDS
     # pydicom <= 0.9.8 doesn't install on python 3
     - if [ "${TRAVIS_PYTHON_VERSION:0:1}" == "2" ]; then

appveyor.yml

@@ -46,7 +46,7 @@ install:
   - "python -c \"import struct; print(struct.calcsize('P') * 8)\""
 
   # Install the dependencies of the project.
-  - "conda install --yes --quiet numpy scipy matplotlib nose h5py"
+  - "conda install --yes --quiet numpy scipy matplotlib nose h5py mock"
   - "pip install pydicom"
   - "python setup.py install"
   - "SET NIBABEL_DATA_DIR=%CD%\\nibabel-data"

doc/source/installation.rst

@@ -92,6 +92,7 @@ Requirements
 *  PyDICOM_ 0.9.7 or greater (optional, for DICOM support)
 *  `Python Imaging Library`_ (optional, for PNG conversion in DICOMFS)
 *  nose_ 0.11 or greater (optional, to run the tests)
+*  mock_ (optional, to run the tests)
 *  sphinx_ (optional, to build the documentation)
 
 Get the development sources