Publish unit test results and code coverage

Also, run tests with pytest, which needs to be installed in the agent.

Fixes #23.

Author: lupino3

azure-pipelines.yml

@@ -29,9 +29,24 @@ jobs:
       versionSpec: '$(python.version)'
       architecture: 'x64'
 
-  - script: python -m unittest discover
+  - script: |
+      pip install pytest
+      pip install pytest-cov
+      pytest tests --doctest-modules --junitxml=junit/test-results.xml --cov=callgraph --cov-report=xml --cov-report=html
     displayName: 'Unit Tests'
 
+  - 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: 'GenerateSamples'
   dependsOn: 'Test'
   pool: