[ci]: setup proper azp

Signed-off-by: Guohan Lu <lguohan@gmail.com>

azure-pipelines.yml

@@ -3,9 +3,6 @@
 # Add steps that build, run tests, deploy, and more:
 # https://aka.ms/yaml
 
-pool:
-  vmImage: sonicbld
-
 trigger:
   branches:
     include:
@@ -22,18 +19,61 @@ stages:
   - job:
     displayName: "build"
     timeoutInMinutes: 60
+
+    pool:
+      vmImage: ubuntu-20.04
+
+    container:
+      image: sonicdev-microsoft.azurecr.io:443/sonic-slave-buster:latest
+
     steps:
     - checkout: self
       clean: true
       submodules: recursive
       displayName: 'Checkout code'
+
+    - task: DownloadPipelineArtifact@2
+      inputs:
+        source: specific
+        project: build
+        pipeline: 1
+        artifact: sonic-buildimage.vs
+        runVersion: 'latestFromBranch'
+        runBranch: 'refs/heads/master'
+      displayName: "Download sonic buildimage"
+
+    - script: |
+        set -ex
+
+        sudo dpkg -i ../target/debs/buster/{libswsscommon_1.0.0_amd64.deb,python3-swsscommon_1.0.0_amd64.deb,libnl-3-200_*.deb,libnl-genl-3-200_*.deb,libnl-nf-3-200_*.deb,libnl-route-3-200_*.deb,libhiredis0.14_*.deb}
+        sudo python3 -m pip install ../target/python-wheels/swsssdk*-py3-*.whl
+        sudo python3 -m pip install ../target/python-wheels/sonic_py_common-1.0-py3-none-any.whl
+        python3 setup.py bdist_wheel
+        cp dist/*.whl $(Build.ArtifactStagingDirectory)/
+      displayName: "Build"
+
     - script: |
-        echo Hello
-        # the following is copied from jenkins
-        # set -ex
-        # ./scripts/common/python-asyncsnmp-build/build.sh
-        # ./scripts/common/python-asyncsnmp-build/test.sh
-    - publish: $(System.DefaultWorkingDirectory)/target/python-wheels/
+        set -ex
+
+        sudo python3 -m pip install dist/asyncsnmp-2.1.0-py3-none-any.whl
+        python3 setup.py test
+      displayName: "Unit tests"
+
+    - task: PublishTestResults@2
+      inputs:
+        testResultsFiles: '$(System.DefaultWorkingDirectory)/test-results.xml'
+        testRunTitle: Python 3
+        failTaskOnFailedTests: true
+      condition: succeededOrFailed()
+      displayName: 'Publish Python 3 test results'
+
+    - task: PublishCodeCoverageResults@1
+      inputs:
+        codeCoverageTool: Cobertura
+        summaryFileLocation: '$(System.DefaultWorkingDirectory)/coverage.xml'
+        reportDirectory: '$(System.DefaultWorkingDirectory)/htmlcov/'
+      displayName: 'Publish Python 3 test coverage'
+
+    - publish: $(Build.ArtifactStagingDirectory)/
       artifact: sonic-snmpagent
       displayName: "Archive artifacts"
-