Add a Windows test job

azure-pipelines.yml

@@ -103,6 +103,32 @@ jobs:
   - script: yarn test-api-chromium --headless --forbid-only
     displayName: 'Integration tests (Chromium)'
 
+- job: Windows_IntegrationTests
+  pool:
+    vmImage: 'vs2017-win2016'
+  steps:
+  - task: NodeTool@0
+    inputs:
+      versionSpec: '10.x'
+    displayName: 'Install Node.js'
+  - task: CacheBeta@1
+    inputs:
+      key: yarn2 | $(Agent.OS) | yarn.lock
+      path: node_modules
+    displayName: Cache node modules
+  - script: yarn --frozen-lockfile
+    displayName: 'Install dependencies and build'
+  - script: |
+      yarn start &
+      sleep 10
+    displayName: 'Start test server'
+  - script: yarn test-api-chromium --headless --forbid-only
+    displayName: 'Integration tests (Chromium)'
+  - script: yarn test-api-firefox --headless --forbid-only
+    displayName: 'Integration tests (Firefox)'
+  - script: yarn test-api-webkit --headless --forbid-only
+    displayName: 'Integration tests (Webkit)'
+
 - job: macOS_IntegrationTests
   pool:
     vmImage: 'macOS-10.15'