1 files changed, 34 insertions, 0 deletions
diff --git a/testing/web-platform/tests/webdriver/tests/bidi/script/evaluate/strict_mode.py b/testing/web-platform/tests/webdriver/tests/bidi/script/evaluate/strict_mode.py
new file mode 100644
index 0000000000..bcaebb51f4
--- /dev/null
+++ b/testing/web-platform/tests/webdriver/tests/bidi/script/evaluate/strict_mode.py
@@ -0,0 +1,34 @@
+import pytest
+
+from webdriver.bidi.modules.script import ContextTarget, ScriptEvaluateResultException
+from ... import any_int, any_string, recursive_compare
+from .. import any_stack_trace, specific_error_response
+
+
+@pytest.mark.asyncio
+async def test_strict_mode(bidi_session, top_context):
+    # As long as there is no `SOME_VARIABLE`, the command should fail in strict mode.
+    with pytest.raises(ScriptEvaluateResultException) as exception:
+        await bidi_session.script.evaluate(
+            expression="'use strict';SOME_VARIABLE=1",
+            target=ContextTarget(top_context["context"]),
+            await_promise=True)
+    recursive_compare(specific_error_response({"type": "error"}), exception.value.result)
+
+    # In non-strict mode, the command should succeed and global `SOME_VARIABLE` should be created.
+    result = await bidi_session.script.evaluate(
+        expression="SOME_VARIABLE=1",
+        target=ContextTarget(top_context["context"]),
+        await_promise=True)
+    assert result == {
+        "type": "number",
+        "value": 1}
+
+    # Access created by the previous command `SOME_VARIABLE`.
+    result = await bidi_session.script.evaluate(
+        expression="'use strict';SOME_VARIABLE=1",
+        target=ContextTarget(top_context["context"]),
+        await_promise=True)
+    assert result == {
+        "type": "number",
+        "value": 1}