Add code coverage and publish on Azure Devops

build/.mocha.unittests.js.opts

@@ -0,0 +1,8 @@
+--require source-map-support/register
+--require out/test/unittests.js
+--reporter mocha-multi-reporters
+--reporter-options configFile=build/.mocha-multi-reporters.config
+--ui tdd
+--recursive
+--colors
+./out/test/**/*.unit.test.js 

build/.mocha.unittests.ts.opts

@@ -0,0 +1,8 @@
+--require ts-node/register
+--require out/test/unittests.js
+--reporter mocha-multi-reporters
+--reporter-options configFile=build/.mocha-multi-reporters.config
+--ui tdd
+--recursive
+--colors
+./src/test/**/*.unit.test.ts

build/.nycrc

@@ -0,0 +1,10 @@
+{
+    "extends": "@istanbuljs/nyc-config-typescript",
+    "all": true,
+    "reporter": ["lcov", "html", "text", "text-summary", "cobertura"],
+    "include": [
+        "src/client/**/*.ts", "src/test/**/*.js",
+        "src/datascience-ui/**/*.ts", "src/datascience-ui/**/*.js"
+    ],
+    "exclude": ["src/test/**/*.ts", "src/test/**/*.js"]
+}

build/ci/templates/test_phases.yml

@@ -145,22 +145,31 @@ steps:
   # This will only run if the string 'testUnitTests' exists in variable `TestsToRun`
   #
   # Example command line (windows pwsh):
-  # > npm run test:unittests
+  # > npm run test:unittests:cover
   - bash: |
-      npm run test:unittests
-    displayName: 'run test:unittest'
+      npm run test:unittests:cover
+    displayName: 'run test:unittests'
     condition: and(succeeded(), contains(variables['TestsToRun'], 'testUnitTests'))
 
   # Upload the test results to Azure DevOps to facilitate test reporting in their UX.
   - task: PublishTestResults@2
-    displayName: 'Publish test:unittest results'
+    displayName: 'Publish test:unittests results'
     condition: contains(variables['TestsToRun'], 'testUnitTests')
     inputs:
       testResultsFiles: '$(MOCHA_FILE)'
       testRunTitle: 'unittests-$(Agent.Os)-Py$(pythonVersion)'
       buildPlatform: '$(Agent.Os)-Py$(pythonVersion)'
       buildConfiguration: 'UnitTests'
 
+  # Publish Code Coverage Results
+  - task: PublishCodeCoverageResults@1
+    displayName: 'Publish test:unittests coverage results'
+    condition: contains(variables['TestsToRun'], 'testUnitTests')
+    inputs:
+      codeCoverageTool: 'cobertura'
+      summaryFileLocation: "$(System.DefaultWorkingDirectory)/coverage/cobertura-coverage.xml"
+      reportDirectory: "$(System.DefaultWorkingDirectory)/coverage"
+
   # Install the requirements for the Python or the system tests. This includes the supporting libs that
   # we ship in our extension such as PTVSD and Jedi.
   #

news/3 Code Health/4472.md

@@ -0,0 +1 @@
+Add code coverage reporting.