1 files changed, 18 insertions, 0 deletions
diff --git a/spec/frontend_integration/test_helpers/snapshot_serializer.js b/spec/frontend_integration/test_helpers/snapshot_serializer.js
new file mode 100644
index 00000000000..8c4f95a9156
--- /dev/null
+++ b/spec/frontend_integration/test_helpers/snapshot_serializer.js
@@ -0,0 +1,18 @@
+export default {
+  test(value) {
+    return value instanceof HTMLElement && !value.$_hit;
+  },
+  print(element, serialize) {
+    element.$_hit = true;
+    element.querySelectorAll('[style]').forEach(el => {
+      el.$_hit = true;
+      if (el.style.display === 'none') {
+        el.textContent = '(jest: contents hidden)';
+      }
+    });
+
+    return serialize(element)
+      .replace(/^\s*<!---->$/gm, '')
+      .replace(/\n\s*\n/gm, '\n');
+  },
+};