Merge pull request #62 from alex-hhh/ah/auto-tests-2

Implement new method for writing plot tests

Author: alex-hhh

.github/workflows/ci.yml

@@ -44,3 +44,13 @@ jobs:
 
       - run: sudo raco pkg install --batch --auto plot-test
       - run: sudo xvfb-run raco test --no-run-if-absent --package plot-test
+
+      # If any of the plot-test tests failed, they will generate new draw step
+      # files and sample images.  Upload these as an Github Actions Artifact,
+      # so they can be inspected by the developer.
+      
+      - uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: 'Updated Data Files'
+          path: plot-test/plot/tests/auto/data/new-*