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https://github.com/aljazceru/mcp-python-sdk.git
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118 lines
3.8 KiB
Python
118 lines
3.8 KiB
Python
import os
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from pathlib import Path
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from tempfile import NamedTemporaryFile
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import pytest
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from pydantic import FileUrl
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from mcp.server.fastmcp.resources import FileResource
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@pytest.fixture
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def temp_file():
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"""Create a temporary file for testing.
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File is automatically cleaned up after the test if it still exists.
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"""
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content = "test content"
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with NamedTemporaryFile(mode="w", delete=False) as f:
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f.write(content)
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path = Path(f.name).resolve()
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yield path
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try:
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path.unlink()
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except FileNotFoundError:
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pass # File was already deleted by the test
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class TestFileResource:
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"""Test FileResource functionality."""
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def test_file_resource_creation(self, temp_file: Path):
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"""Test creating a FileResource."""
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resource = FileResource(
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uri=FileUrl(temp_file.as_uri()),
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name="test",
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description="test file",
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path=temp_file,
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)
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assert str(resource.uri) == temp_file.as_uri()
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assert resource.name == "test"
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assert resource.description == "test file"
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assert resource.mime_type == "text/plain" # default
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assert resource.path == temp_file
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assert resource.is_binary is False # default
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def test_file_resource_str_path_conversion(self, temp_file: Path):
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"""Test FileResource handles string paths."""
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resource = FileResource(
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uri=FileUrl(f"file://{temp_file}"),
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name="test",
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path=Path(str(temp_file)),
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)
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assert isinstance(resource.path, Path)
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assert resource.path.is_absolute()
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@pytest.mark.anyio
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async def test_read_text_file(self, temp_file: Path):
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"""Test reading a text file."""
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resource = FileResource(
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uri=FileUrl(f"file://{temp_file}"),
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name="test",
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path=temp_file,
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)
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content = await resource.read()
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assert content == "test content"
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assert resource.mime_type == "text/plain"
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@pytest.mark.anyio
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async def test_read_binary_file(self, temp_file: Path):
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"""Test reading a file as binary."""
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resource = FileResource(
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uri=FileUrl(f"file://{temp_file}"),
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name="test",
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path=temp_file,
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is_binary=True,
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)
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content = await resource.read()
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assert isinstance(content, bytes)
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assert content == b"test content"
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def test_relative_path_error(self):
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"""Test error on relative path."""
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with pytest.raises(ValueError, match="Path must be absolute"):
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FileResource(
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uri=FileUrl("file:///test.txt"),
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name="test",
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path=Path("test.txt"),
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)
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@pytest.mark.anyio
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async def test_missing_file_error(self, temp_file: Path):
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"""Test error when file doesn't exist."""
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# Create path to non-existent file
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missing = temp_file.parent / "missing.txt"
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resource = FileResource(
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uri=FileUrl("file:///missing.txt"),
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name="test",
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path=missing,
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)
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with pytest.raises(ValueError, match="Error reading file"):
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await resource.read()
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@pytest.mark.skipif(os.name == "nt", reason="File permissions behave differently on Windows")
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@pytest.mark.anyio
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async def test_permission_error(self, temp_file: Path):
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"""Test reading a file without permissions."""
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temp_file.chmod(0o000) # Remove all permissions
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try:
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resource = FileResource(
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uri=FileUrl(temp_file.as_uri()),
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name="test",
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path=temp_file,
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)
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with pytest.raises(ValueError, match="Error reading file"):
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await resource.read()
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finally:
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temp_file.chmod(0o644) # Restore permissions
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