Files
mcp-python-sdk/tests/server/test_read_resource.py
2025-06-11 11:45:50 +02:00

111 lines
3.4 KiB
Python

from collections.abc import Iterable
from pathlib import Path
from tempfile import NamedTemporaryFile
import pytest
from pydantic import AnyUrl, FileUrl
import mcp.types as types
from mcp.server.lowlevel.server import ReadResourceContents, Server
@pytest.fixture
def temp_file():
"""Create a temporary file for testing."""
with NamedTemporaryFile(mode="w", delete=False) as f:
f.write("test content")
path = Path(f.name).resolve()
yield path
try:
path.unlink()
except FileNotFoundError:
pass
@pytest.mark.anyio
async def test_read_resource_text(temp_file: Path):
server = Server("test")
@server.read_resource()
async def read_resource(uri: AnyUrl) -> Iterable[ReadResourceContents]:
return [ReadResourceContents(content="Hello World", mime_type="text/plain")]
# Get the handler directly from the server
handler = server.request_handlers[types.ReadResourceRequest]
# Create a request
request = types.ReadResourceRequest(
method="resources/read",
params=types.ReadResourceRequestParams(uri=FileUrl(temp_file.as_uri())),
)
# Call the handler
result = await handler(request)
assert isinstance(result.root, types.ReadResourceResult)
assert len(result.root.contents) == 1
content = result.root.contents[0]
assert isinstance(content, types.TextResourceContents)
assert content.text == "Hello World"
assert content.mimeType == "text/plain"
@pytest.mark.anyio
async def test_read_resource_binary(temp_file: Path):
server = Server("test")
@server.read_resource()
async def read_resource(uri: AnyUrl) -> Iterable[ReadResourceContents]:
return [ReadResourceContents(content=b"Hello World", mime_type="application/octet-stream")]
# Get the handler directly from the server
handler = server.request_handlers[types.ReadResourceRequest]
# Create a request
request = types.ReadResourceRequest(
method="resources/read",
params=types.ReadResourceRequestParams(uri=FileUrl(temp_file.as_uri())),
)
# Call the handler
result = await handler(request)
assert isinstance(result.root, types.ReadResourceResult)
assert len(result.root.contents) == 1
content = result.root.contents[0]
assert isinstance(content, types.BlobResourceContents)
assert content.mimeType == "application/octet-stream"
@pytest.mark.anyio
async def test_read_resource_default_mime(temp_file: Path):
server = Server("test")
@server.read_resource()
async def read_resource(uri: AnyUrl) -> Iterable[ReadResourceContents]:
return [
ReadResourceContents(
content="Hello World",
# No mime_type specified, should default to text/plain
)
]
# Get the handler directly from the server
handler = server.request_handlers[types.ReadResourceRequest]
# Create a request
request = types.ReadResourceRequest(
method="resources/read",
params=types.ReadResourceRequestParams(uri=FileUrl(temp_file.as_uri())),
)
# Call the handler
result = await handler(request)
assert isinstance(result.root, types.ReadResourceResult)
assert len(result.root.contents) == 1
content = result.root.contents[0]
assert isinstance(content, types.TextResourceContents)
assert content.text == "Hello World"
assert content.mimeType == "text/plain"