Add linter to report new Karma specslint-jest-not-karma-added-specs

Prefer Jest specs instead.

3 files changed, 20 insertions, 1 deletions

diff --git a/scripts/frontend/lint-new-fe-karma-specs.sh b/scripts/frontend/lint-new-fe-karma-specs.sh
new file mode 100755
index 00000000000..74c860231b8
--- /dev/null
+++ b/scripts/frontend/lint-new-fe-karma-specs.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+git remote -v
+
+NEW_KARMA_SPECS_COUNT=`git diff --name-only origin/master --diff-filter A | grep spec/javascripts | wc -l | tr -d '[:space:]'`
+
+echo "=> Found $NEW_KARMA_SPECS_COUNT new karma spec(s)."
+
+if [ $NEW_KARMA_SPECS_COUNT -gt 0 ]; then
+  echo "✖ ERROR: Please use Jest (spec/frontend) for new specs instead of Karma-Jasmine (spec/javascripts)."
+  exit 1
+fi
+
+echo "✔︎ No new Karma specs found. Thank you!"
+exit 0
diff --git a/scripts/static-analysis b/scripts/static-analysis
index 642c50ec0a8..42e01a91327 100755
--- a/scripts/static-analysis
+++ b/scripts/static-analysis
@@ -33,7 +33,8 @@ tasks = [
   %w[yarn run prettier-all],
   %w[bundle exec rubocop --parallel],
   %w[scripts/lint-conflicts.sh],
-  %w[scripts/lint-rugged]
+  %w[scripts/lint-rugged],
+  %w[scripts/frontend/lint-new-fe-karma-specs.sh]
 ]
 
 static_analysis = Gitlab::Popen::Runner.new
diff --git a/spec/javascripts/new_test_failure_spec.js b/spec/javascripts/new_test_failure_spec.js
new file mode 100644
index 00000000000..bc3fffd730c
--- /dev/null
+++ b/spec/javascripts/new_test_failure_spec.js
@@ -0,0 +1,3 @@
+export default {
+  test: 'test',
+};