test(filetree): Initial tests

Author: effigies

tests/types/__init__.py

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+"""Tests for bids_validator.types."""

tests/types/test_files.py

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+"""Tests for bids_validator.types.files."""
+
+import attrs
+from bids_validator.types.files import FileTree
+
+
+def test_FileTree(examples):
+    """Test the FileTree class."""
+    ds000117 = FileTree.read_from_filesystem(examples / 'ds000117')
+    assert 'sub-01/ses-mri/anat/sub-01_ses-mri_acq-mprage_T1w.nii.gz' in ds000117
+    assert ds000117.children['sub-01'].parent is ds000117
+
+    # Verify that evolving FileTrees creates consistent structures
+    evolved = attrs.evolve(ds000117)
+    assert evolved.children['sub-01'].parent is not ds000117
+    assert evolved.children['sub-01'].parent is evolved
+    assert evolved.children['sub-01'].children['ses-mri'].parent is not ds000117.children['sub-01']
+    assert evolved.children['sub-01'].children['ses-mri'].parent is evolved.children['sub-01']