Integrate OE license on travis

.travis.yml

@@ -1,49 +1,37 @@
 language: python
-
-# Run jobs on container-based infrastructure, can be overridden per job
-
+dist: xenial
 matrix:
   include:
-    # Extra includes for OSX since python language is not available by default on OSX
-    - os: osx
-      language: generic
-      env: PYTHON_VER=3.6
-    - os: osx
-      language: generic
-      env: PYTHON_VER=3.7
-
-    - os: linux
-      python: 3.6
-      env: PYTHON_VER=3.6
-    - os: linux
-      python: 3.7
-      env: PYTHON_VER=3.7
-
+  - os: osx
+    language: generic
+    env: PYTHON_VER=3.6
+  - os: osx
+    language: generic
+    env: PYTHON_VER=3.7
+  - os: linux
+    python: 3.6
+    env: PYTHON_VER=3.6
+  - os: linux
+    python: 3.7
+    env: PYTHON_VER=3.7
+env:
+  global:
+    - OE_LICENSE="$HOME/oe_license.txt"
 before_install:
-    # Additional info about the build
-  - uname -a
-  - df -h
-  - ulimit -a
-
-    # Install the Python environment
-  - source devtools/travis-ci/before_install.sh
-  - python -V
-
+- openssl aes-256-cbc -K $encrypted_c469bd55e683_key -iv $encrypted_c469bd55e683_iv
+  -in oe_license.txt.enc -out $OE_LICENSE -d
+- uname -a
+- df -h
+- ulimit -a
+- source devtools/travis-ci/before_install.sh
+- python -V
 install:
-
-    # Create test environment for package
-  - python devtools/scripts/create_conda_env.py -n=test -p=$PYTHON_VER devtools/conda-envs/test_env.yaml
-    # Activate the test environment
-  - conda activate test
-    # Build and install package
-  - python setup.py develop --no-deps
-
-
+- python devtools/scripts/create_conda_env.py -n=test -p=$PYTHON_VER devtools/conda-envs/test_env.yaml
+- conda activate test
+- python setup.py develop --no-deps
 script:
-  - pytest -v --cov=propertyestimator propertyestimator/tests/
-
+- pytest -v --cov=propertyestimator propertyestimator/tests/
 notifications:
-    email: false
-
+  email: false
 after_success:
-  - codecov
+- codecov

devtools/conda-envs/test_env.yaml

@@ -12,3 +12,5 @@ dependencies:
     # Pip-only installs
   - pip:
     - codecov
+    - --extra-index-url https://pypi.anaconda.org/OpenEye/simple
+    - OpenEye-toolkits

propertyestimator/tests/test_openeye.py

@@ -0,0 +1,5 @@
+def test_openeye_is_available():
+    import importlib
+    oechem = importlib.import_module('openeye', 'oechem')
+    if not oechem.OEChemIsLicensed():
+        raise ImportError