1 files changed, 23 insertions, 0 deletions
diff --git a/spec/support/matchers/pushed_frontend_feature_flags_matcher.rb b/spec/support/matchers/pushed_frontend_feature_flags_matcher.rb
new file mode 100644
index 00000000000..b49d4da8cda
--- /dev/null
+++ b/spec/support/matchers/pushed_frontend_feature_flags_matcher.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+RSpec::Matchers.define :have_pushed_frontend_feature_flags do |expected|
+  def to_js(key, value)
+    "\"#{key}\":#{value}"
+  end
+
+  match do |actual|
+    expected.all? do |feature_flag_name, enabled|
+      page.html.include?(to_js(feature_flag_name, enabled))
+    end
+  end
+
+  failure_message do |actual|
+    missing = expected.select do |feature_flag_name, enabled|
+      !page.html.include?(to_js(feature_flag_name, enabled))
+    end
+
+    formatted_missing_flags = missing.map { |feature_flag_name, enabled| to_js(feature_flag_name, enabled) }.join("\n")
+
+    "The following feature flag(s) cannot be found in the frontend HTML source: #{formatted_missing_flags}"
+  end
+end