Use a conda environment to ensure package versions for testing

.travis.yml

@@ -46,14 +46,8 @@ install:
   # Useful for debugging any issues with conda
 
   # Replace dep1 dep2 ... with your dependencies
-  - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION stoner pandas image-registration python-dateutil
+  - conda env create -f tests/test-env.yml
   - conda activate test-environment
-  # This will ensure we collect all the necessary dependencies so long as master doesn't change them!
-  # Hyperspy is now an optional dependency for 3.6 onwards
-  - conda install hyperspy
-  - conda install pytest pytest-runner pytest-cov pytest-forked pytest-xdist
-  # Now we unistall the stable stoner - use force to stop downgrading packages!
-  - conda remove --yes --force stoner
   - pip install coveralls
   - pip install --no-deps .
 

tests/test-env.yml

@@ -0,0 +1,29 @@
+name: test-environment
+channels:
+    - defaults
+    - phygbu
+    - conda-forge
+dependencies:
+    - anaconda
+    - python=3.7
+    - hyperspy
+    - pytest-xdist
+    - pytest-cov
+    - pytest-runner
+    - pytest
+    - pytest-forked
+    - scikit-image=0.17
+    - h5py<3.0
+    - cycler>=0.10.0
+    - filemagic>=1.6
+    - image-registration>=0.2.1
+    - lmfit>=0.9.7
+    - memoization>=0.1.4
+    - npTDMS>=0.11
+    - python-dateutil>=2.7.0
+    - statsmodels
+    - tabulate>=0.8
+    - imreg_dft>=2.0
+    - multiprocess>=0.70
+    - dill>=0.2.8
+