1 files changed, 28 insertions, 0 deletions
diff --git a/layout/generic/test/selection_cross_shadow_boundary_helper.js b/layout/generic/test/selection_cross_shadow_boundary_helper.js
new file mode 100644
index 0000000000..b2a596a27f
--- /dev/null
+++ b/layout/generic/test/selection_cross_shadow_boundary_helper.js
@@ -0,0 +1,28 @@
+// Helper file for test_selection_cross_shadow_boundary_* related tests
+
+function drag(
+  fromTarget,
+  fromX,
+  fromY,
+  toTarget,
+  toX,
+  toY,
+  withAccelKey = false
+) {
+  synthesizeMouse(fromTarget, fromX, fromY, {
+    type: "mousemove",
+    accelKey: withAccelKey,
+  });
+  synthesizeMouse(fromTarget, fromX, fromY, {
+    type: "mousedown",
+    accelKey: withAccelKey,
+  });
+  synthesizeMouse(toTarget, toX, toY, {
+    type: "mousemove",
+    accelKey: withAccelKey,
+  });
+  synthesizeMouse(toTarget, toX, toY, {
+    type: "mouseup",
+    accelKey: withAccelKey,
+  });
+}