tests: unit: add filesystem manager tests

Author: elopez

tests/unit/__init__.py

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+"""Fixtures for unit tests with mocking."""
+
+from unittest.mock import Mock
+
+import pytest
+import requests
+
+from solc_select.infrastructure.filesystem import FilesystemManager
+from solc_select.models.platforms import Platform
+from solc_select.models.versions import SolcVersion
+from solc_select.repositories import SolcRepository
+
+
+@pytest.fixture
+def mock_session():
+    """Mock requests.Session for HTTP calls."""
+    return Mock(spec=requests.Session)
+
+
+@pytest.fixture
+def mock_filesystem():
+    """Mock FilesystemManager."""
+    return Mock(spec=FilesystemManager)
+
+
+@pytest.fixture
+def mock_platform():
+    """Mock Platform (linux-amd64 by default)."""
+    return Platform("linux", "amd64")
+
+
+@pytest.fixture
+def mock_repository():
+    """Mock SolcRepository with common version set."""
+    mock = Mock(spec=SolcRepository)
+    mock.available_versions = {
+        SolcVersion("0.8.19"): "solc-linux-amd64-v0.8.19+commit.abc123",
+        SolcVersion("0.8.20"): "solc-linux-amd64-v0.8.20+commit.def456",
+        SolcVersion("0.8.21"): "solc-linux-amd64-v0.8.21+commit.ghi789",
+    }
+    mock.latest_version = SolcVersion("0.8.21")
+    return mock
+
+
+@pytest.fixture
+def sample_versions():
+    """Sample version list for testing."""
+    return [
+        SolcVersion("0.8.19"),
+        SolcVersion("0.8.20"),
+        SolcVersion("0.8.21"),
+    ]
+
+
+@pytest.fixture
+def temp_artifacts_dir(tmp_path, monkeypatch):
+    """Temporary artifacts directory for testing filesystem operations."""
+    artifacts_dir = tmp_path / "artifacts"
+    artifacts_dir.mkdir()
+    monkeypatch.setattr("solc_select.constants.ARTIFACTS_DIR", artifacts_dir)
+    return artifacts_dir
+
+
+@pytest.fixture
+def temp_solc_select_dir(tmp_path, monkeypatch):
+    """Temporary solc-select directory for testing."""
+    solc_select_dir = tmp_path / ".solc-select"
+    solc_select_dir.mkdir()
+    artifacts_dir = solc_select_dir / "artifacts"
+    artifacts_dir.mkdir()
+
+    # Patch constants module
+    monkeypatch.setattr("solc_select.constants.SOLC_SELECT_DIR", solc_select_dir)
+    monkeypatch.setattr("solc_select.constants.ARTIFACTS_DIR", artifacts_dir)
+
+    # Patch where constants are imported in filesystem module
+    monkeypatch.setattr("solc_select.infrastructure.filesystem.ARTIFACTS_DIR", artifacts_dir)
+    monkeypatch.setattr("solc_select.infrastructure.filesystem.SOLC_SELECT_DIR", solc_select_dir)
+
+    return solc_select_dir