variables:
  YARN_CACHE_FOLDER: $(Pipeline.Workspace)/.yarn

strategy:
  matrix:
    linux:
      imageName: 'ubuntu-16.04'
      nodeVersion: '13.x'
    mac:
      imageName: 'macos-10.14'
      nodeVersion: '13.x'
    windows:
      imageName: 'windows-2019'
      nodeVersion: '13.x'

pool:
  vmImage: $(imageName)

steps:
  # Set node version
  - task: NodeTool@0
    inputs:
      versionSpec: $(nodeVersion)
  # Cache yarn deps
  - task: Cache@2
    inputs:
      key: 'yarn | "$(Agent.OS)" | yarn.lock'
      restoreKeys: |
        yarn | "$(Agent.OS)"
        yarn
      path: $(YARN_CACHE_FOLDER)
    displayName: Cache Yarn packages
  # Start virtual framebuffer server
  - bash: |
      /usr/bin/Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
      echo ">>> Started xvfb"
    displayName: Start xvfb
    condition: and(succeeded(), eq(variables['Agent.OS'], 'Linux'))
  # Install deps with yarn and run tests
  - script: yarn --frozen-lockfile && yarn test-all
    env:
      DISPLAY: ':99.0'
  # Generate coverage report
  - script: yarn test --coverage --coverageReporters=cobertura
  # Publish coverage report
  - task: PublishCodeCoverageResults@1
    inputs:
      codeCoverageTool: Cobertura
      summaryFileLocation: $(System.DefaultWorkingDirectory)/coverage/cobertura-coverage.xml