move and enable visual tests

.azure/test-linux.yml

@@ -11,6 +11,7 @@ parameters:
 
   - name: "testImages"
     type: boolean
+    default: true
 
   - name: "installFromSdist"
     type: boolean
@@ -185,10 +186,55 @@ jobs:
           env:
             SETUPTOOLS_ENABLE_FEATURES: "legacy-editable"
 
-        - bash: image_tests/bin/python -m unittest discover -v test/ipynb
+        - bash: image_tests/bin/python -m unittest discover -v test/visual
           displayName: 'Run image test'
           env:
             # Needed to suppress a warning in jupyter-core 5.x by eagerly migrating to
             # a new internal interface that will be the default in jupyter-core 6.x.
             # This variable should become redundant on release of jupyter-core 6.
             JUPYTER_PLATFORM_DIRS: 1
+
+        - task: ArchiveFiles@2
+          displayName: Archive circuit failure diffs
+          inputs:
+            rootFolderOrFile: 'test/visual/mpl/circuit/circuitfailures'
+            archiveType: tar
+            archiveFile: '$(Build.ArtifactStagingDirectory)/circuit_failures.tar.gz'
+            verbose: true
+          condition: failed()
+
+        - task: ArchiveFiles@2
+          displayName: Archive graph failure diffs
+          inputs:
+            rootFolderOrFile: 'test/visual/mpl/graph/graphfailures'
+            archiveType: tar
+            archiveFile: '$(Build.ArtifactStagingDirectory)/graph_failures.tar.gz'
+            verbose: true
+          condition: failed()
+
+        - task: ArchiveFiles@2
+          displayName: Archive circuit results
+          inputs:
+            rootFolderOrFile: 'test/visual/mpl/circuit/results'
+            archiveType: tar
+            archiveFile: '$(Build.ArtifactStagingDirectory)/circuit_results.tar.gz'
+            verbose: true
+          condition: failed()
+
+        - task: ArchiveFiles@2
+          displayName: Archive graph results
+          inputs:
+            rootFolderOrFile: 'test/visual/mpl/graph/results'
+            archiveType: tar
+            archiveFile: '$(Build.ArtifactStagingDirectory)/graph_results.tar.gz'
+            verbose: true
+          condition: failed()
+
+        - task: PublishBuildArtifacts@1
+          displayName: 'Publish image test failure diffs'
+          inputs:
+            pathtoPublish: '$(Build.ArtifactStagingDirectory)'
+            artifactName: 'image_test_failure_img_diffs'
+            Parallel: true
+            ParallelCount: 8
+          condition: failed()