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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /webdriver/bidi/moz/debugging/paused/call_frames.py - WPT Dashboard Interop Dashboard
import asyncio
import pytest
from webdriver.bidi.modules.script import ContextTarget
pytestmark = pytest.mark.asyncio
from .. import PAUSED_EVENT, RESUMED_EVENT
async def test_paused_event_includes_call_frames(
bidi_session,
new_tab,
enable_debugging,
inline,
subscribe_events,
wait_for_event,
set_breakpoint,
):
await subscribe_events([PAUSED_EVENT, RESUMED_EVENT])
await enable_debugging(contexts=[new_tab["context"]])
url = inline(
"""<script>
function calculate() {
const a = 10;
let b = 20;
const sum = a + b;
return sum;
}
</script>"""
)
await bidi_session.browsing_context.navigate(
context=new_tab["context"], url=url, wait="complete"
)
await set_breakpoint(location={"url": url, "line": 7})
on_paused = wait_for_event(PAUSED_EVENT)
eval_task = asyncio.create_task(
bidi_session.script.evaluate(
expression="calculate()",
target=ContextTarget(new_tab["context"]),
await_promise=False,
)
)
paused_event = await on_paused
assert paused_event["context"] == new_tab["context"]
assert paused_event["line"] == 7
assert "callFrames" in paused_event
assert isinstance(paused_event["callFrames"], list)
assert len(paused_event["callFrames"]) > 0
top_frame = paused_event["callFrames"][0]
assert "callFrameId" in top_frame
assert "functionName" in top_frame
assert top_frame["functionName"] == "calculate"
assert "location" in top_frame
assert top_frame["location"]["url"] == url
assert top_frame["location"]["line"] == 7
assert "scopeChain" in top_frame
assert isinstance(top_frame["scopeChain"], list)
assert len(top_frame["scopeChain"]) > 0
lexical_scope = None
for scope in top_frame["scopeChain"]:
if scope["type"] == "function lexical":
lexical_scope = scope
break
assert lexical_scope is not None, "Should have a function lexical scope"
assert "variables" in lexical_scope
assert isinstance(lexical_scope["variables"], dict)
assert "a" in lexical_scope["variables"]
assert "b" in lexical_scope["variables"]
a_value = lexical_scope["variables"]["a"]
assert a_value["type"] == "number"
assert a_value["value"] == 10
b_value = lexical_scope["variables"]["b"]
assert b_value["type"] == "number"
assert b_value["value"] == 20
assert "sum" in lexical_scope["variables"]
sum_value = lexical_scope["variables"]["sum"]
assert sum_value["type"] == "uninitialized"
await bidi_session.moz.debugging.resume(context=new_tab["context"])
result = await eval_task
assert result["type"] == "number"
assert result["value"] == 30
async def test_call_frames_nested_functions(
bidi_session,
new_tab,
enable_debugging,
inline,
subscribe_events,
wait_for_event,
set_breakpoint,
):
await subscribe_events([PAUSED_EVENT, RESUMED_EVENT])
await enable_debugging(contexts=[new_tab["context"]])
url = inline(
"""<script>
function outer(x) {
const outerVar = x * 2;
return inner(outerVar);
}
function inner(y) {
const innerVar = y + 10;
return innerVar;
}
</script>"""
)
await bidi_session.browsing_context.navigate(
context=new_tab["context"], url=url, wait="complete"
)
await set_breakpoint(location={"url": url, "line": 11})
on_paused = wait_for_event(PAUSED_EVENT)
eval_task = asyncio.create_task(
bidi_session.script.evaluate(
expression="outer(5)",
target=ContextTarget(new_tab["context"]),
await_promise=False,
)
)
paused_event = await on_paused
assert "callFrames" in paused_event
call_frames = paused_event["callFrames"]
assert len(call_frames) >= 2, "Should have at least inner and outer frames"
inner_frame = call_frames[0]
assert inner_frame["functionName"] == "inner"
outer_frame = call_frames[1]
assert outer_frame["functionName"] == "outer"
inner_lexical_scope = None
inner_function_scope = None
for scope in inner_frame["scopeChain"]:
if scope["type"] == "function lexical":
inner_lexical_scope = scope
elif scope["type"] == "function":
inner_function_scope = scope
assert inner_lexical_scope is not None
assert "innerVar" in inner_lexical_scope["variables"]
assert inner_lexical_scope["variables"]["innerVar"]["value"] == 20
assert inner_function_scope is not None
assert "y" in inner_function_scope["variables"]
assert inner_function_scope["variables"]["y"]["value"] == 10
outer_lexical_scope = None
outer_function_scope = None
for scope in outer_frame["scopeChain"]:
if scope["type"] == "function lexical":
outer_lexical_scope = scope
elif scope["type"] == "function":
outer_function_scope = scope
assert outer_lexical_scope is not None
assert "outerVar" in outer_lexical_scope["variables"]
assert outer_lexical_scope["variables"]["outerVar"]["value"] == 10
assert outer_function_scope is not None
assert "x" in outer_function_scope["variables"]
assert outer_function_scope["variables"]["x"]["value"] == 5
await bidi_session.moz.debugging.resume(context=new_tab["context"])
result = await eval_task
assert result["type"] == "number"
assert result["value"] == 20