1 files changed, 14 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-grid/alignment/support/style-change.js b/testing/web-platform/tests/css/css-grid/alignment/support/style-change.js
new file mode 100644
index 0000000000..766d140d2b
--- /dev/null
+++ b/testing/web-platform/tests/css/css-grid/alignment/support/style-change.js
@@ -0,0 +1,14 @@
+function evaluateStyleChange(element, phase, expectedProperty, expectedResult) {
+    element.className += " " + phase;
+    element.setAttribute(expectedProperty, expectedResult);
+    checkLayout("." + phase, false);
+}
+function evaluateStyleChangeMultiple(phase, expectedResult) {
+    for (var item in expectedResult) {
+        var element = document.getElementById(item);
+        element.className += " " + phase;
+        for (var key in expectedResult[item])
+            element.setAttribute(key, expectedResult[item][key]);
+    }
+    checkLayout("." + phase, false);
+}