1 files changed, 61 insertions, 0 deletions
diff --git a/testing/web-platform/mozilla/tests/webdriver/bidi/script/exception_details.py b/testing/web-platform/mozilla/tests/webdriver/bidi/script/exception_details.py
new file mode 100644
index 0000000000..2af2d5d24f
--- /dev/null
+++ b/testing/web-platform/mozilla/tests/webdriver/bidi/script/exception_details.py
@@ -0,0 +1,61 @@
+import pytest
+from webdriver.bidi.modules.script import ContextTarget, ScriptEvaluateResultException
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("await_promise", [True, False])
+@pytest.mark.parametrize(
+    "expression",
+    [
+        "null",
+        "{ toString: 'not a function' }",
+        "{ toString: () => {{ throw 'toString not allowed'; }} }",
+        "{ toString: () => true }",
+    ],
+)
+@pytest.mark.asyncio
+async def test_call_function_without_to_string_interface(
+    bidi_session, top_context, await_promise, expression
+):
+    function_declaration = "()=>{throw { toString: 'not a function' } }"
+    if await_promise:
+        function_declaration = "async" + function_declaration
+
+    with pytest.raises(ScriptEvaluateResultException) as exception:
+        await bidi_session.script.call_function(
+            function_declaration=function_declaration,
+            await_promise=await_promise,
+            target=ContextTarget(top_context["context"]),
+        )
+
+    assert isinstance(exception.value.text, str)
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("await_promise", [True, False])
+@pytest.mark.parametrize(
+    "expression",
+    [
+        "null",
+        "{ toString: 'not a function' }",
+        "{ toString: () => {{ throw 'toString not allowed'; }} }",
+        "{ toString: () => true }",
+    ],
+)
+@pytest.mark.asyncio
+async def test_evaluate_without_to_string_interface(
+    bidi_session, top_context, await_promise, expression
+):
+    if await_promise:
+        expression = f"Promise.reject({expression})"
+    else:
+        expression = f"throw {expression}"
+
+    with pytest.raises(ScriptEvaluateResultException) as exception:
+        await bidi_session.script.evaluate(
+            expression=expression,
+            await_promise=await_promise,
+            target=ContextTarget(top_context["context"]),
+        )
+
+    assert isinstance(exception.value.text, str)