add custom a11y rules to bok choy tests

.gitignore

@@ -34,6 +34,11 @@ coverage.xml
 test_ora2db
 test_ora2db-journal
 
+# Bok choy
+test/custom_a11y_rules.js
+test/acceptance/screenshots/*.png
+test/logs/*
+
 # Mr Developer
 .mr.developer.cfg
 .project

scripts/test-acceptance.sh

@@ -33,5 +33,24 @@ cd test/logs
 
 test_name="${1:-acceptance}"
 
+
+# The machines that these tests run on in jenkins have an old
+# version of npm which doesn't seem to work with the
+# requirements in this repo. There is a devops ticket for
+# this, but it may be better to wait until some of the other
+# work they have going on now is done before attempting to
+# install the custom rules via npm. This bit of code is a
+# work around for that. It will work both in jenkins and for
+# local runs of the tests.
+if [[ "${test_name}" = "accessibility" ]]; then
+    export BOKCHOY_A11Y_CUSTOM_RULES_FILE=../../test/custom_a11y_rules.js
+
+    if [[ ! -f $BOKCHOY_A11Y_CUSTOM_RULES_FILE ]]; then
+        echo "Custom a11y rules file not found. Fetching it..."
+        custom_a11y_version=8633ea2fd04d84d69c4610bbfbf38db32ad005a9
+        curl https://raw.githubusercontent.com/edx/edx-custom-a11y-rules/${custom_a11y_version}/lib/custom_a11y_rules.js > ${BOKCHOY_A11Y_CUSTOM_RULES_FILE}
+    fi
+fi
+
 echo "Running acceptance tests from ${test_name}.py against the sandbox..."
 python ../acceptance/${test_name}.py

test/acceptance/accessibility.py

@@ -16,12 +16,21 @@ class OpenAssessmentA11yTest(OpenAssessmentTest):
         self.auto_auth_page.visit()
 
     def _check_a11y(self, page):
+        page.a11y_audit.config.set_scope(
+            exclude=[
+                ".container-footer",
+                ".nav-skip",
+                "#global-navigation",
+            ],
+        )
         page.a11y_audit.config.set_rules({
             "ignore": [
                 "aria-valid-attr",  # TODO: AC-199
                 "color-contrast",  # TODO: AC-198
                 "empty-heading",  # TODO: AC-197
+                "link-href",  # TODO: AC-199
                 "link-name",  # TODO: AC-196
+                "skip-link",  # TODO: AC-179
             ]
         })
         page.a11y_audit.check_for_accessibility_errors()