add macOS 10.14 Mojave to Azure Pipelines CI (#812)

Author: cwhanse

azure-pipelines.yml

@@ -134,6 +134,43 @@ jobs:
       testRunTitle: 'Windows $(python.version)'
 
 
+- job: 'Test_bare_macOS_Mojave'
+
+  pool:
+    vmImage: 'macOS-10.14'
+  strategy:
+    matrix:
+      Python35:
+        python.version: '3.5'
+      Python36:
+        python.version: '3.6'
+      Python37:
+        python.version: '3.7'
+
+  steps:
+  - task: UsePythonVersion@0
+    inputs:
+      versionSpec: '$(python.version)'
+
+  - script: |
+      pip install pytest pytest-cov pytest-mock pytest-timeout pytest-azurepipelines
+      pip install -e .
+      pytest pvlib/test --junitxml=junit/test-results.xml --cov=pvlib --cov-report=xml --cov-report=html
+    displayName: 'Test with pytest'
+
+  - task: PublishTestResults@2
+    condition: succeededOrFailed()
+    inputs:
+      testResultsFiles: '**/test-*.xml'
+      testRunTitle: 'Publish test results for Python $(python.version)'
+
+  - task: PublishCodeCoverageResults@1
+    inputs:
+      codeCoverageTool: Cobertura
+      summaryFileLocation: '$(System.DefaultWorkingDirectory)/**/coverage.xml'
+      reportDirectory: '$(System.DefaultWorkingDirectory)/**/htmlcov'
+
+
 - job: 'Publish'
   dependsOn: 'Test_conda_linux'
   pool:
@@ -146,4 +183,4 @@ jobs:
       architecture: 'x64'
 
   - script: python setup.py sdist
-    displayName: 'Build sdist'
+    displayName: 'Build sdist'