test_176_progress_token.py•1.66 kB
from unittest.mock import AsyncMock, MagicMock
import pytest
from mcp.shared.context import RequestContext
from mcp.server.fastmcp import Context
pytestmark = pytest.mark.anyio
async def test_progress_token_zero_first_call():
"""Test that progress notifications work when progress_token is 0 on first call."""
# Create mock session with progress notification tracking
mock_session = AsyncMock()
mock_session.send_progress_notification = AsyncMock()
# Create request context with progress token 0
mock_meta = MagicMock()
mock_meta.progressToken = 0 # This is the key test case - token is 0
request_context = RequestContext(
request_id="test-request",
session=mock_session,
meta=mock_meta,
lifespan_context=None,
)
# Create context with our mocks
ctx = Context(request_context=request_context, fastmcp=MagicMock())
# Test progress reporting
await ctx.report_progress(0, 10) # First call with 0
await ctx.report_progress(5, 10) # Middle progress
await ctx.report_progress(10, 10) # Complete
# Verify progress notifications
assert (
mock_session.send_progress_notification.call_count == 3
), "All progress notifications should be sent"
mock_session.send_progress_notification.assert_any_call(
progress_token=0, progress=0.0, total=10.0, message=None
)
mock_session.send_progress_notification.assert_any_call(
progress_token=0, progress=5.0, total=10.0, message=None
)
mock_session.send_progress_notification.assert_any_call(
progress_token=0, progress=10.0, total=10.0, message=None
)