yews.files under cover.

tests/test_datasets.py

@@ -113,8 +113,13 @@ def build_dataset(self):
             return DummpyDatasetlike(), DummpyDatasetlike()
 
     def test_root_is_path(self):
+        # check existing path
         dset = self.DummyPathDataset(root='.')
+        # check path resolved
         assert dset.root == Path(dset.root).resolve()
+        # check non-existing path
+        with pytest.raises(ValueError):
+            dset = self.DummyPathDataset(root='abc')
 
 
 class TestDirDataset:
@@ -127,7 +132,7 @@ def build_dataset(self):
     def test_dir_check(self):
         dset = self.DummyDirDataset(root='.')
         with pytest.raises(ValueError):
-            dset = self.DummyDirDataset(root='abc')
+            dset = self.DummyDirDataset(root='setup.py')
 
 
 class TestDatasetArrayFolder:
@@ -143,3 +148,23 @@ def test_loading_folder(self):
         dset = datasets.DatasetFolder(root=root_dir/ 'folder', loader=np.load)
         assert all([dset[0][0].shape == (3, 100), type(dset[0][1]) is str])
 
+
+class TestFileDataset:
+
+    class DummpyFileDataset(datasets.FileDataset):
+
+        def build_dataset(self):
+            return DummpyDatasetlike(), DummpyDatasetlike()
+
+    def test_file_check(self):
+        dset = self.DummpyFileDataset(root='setup.py')
+        with pytest.raises(ValueError):
+            dset = self.DummpyFileDataset(root='.')
+
+
+class TestDatasetArray:
+
+    def test_loading_array(self):
+        dset = datasets.DatasetArray(root=root_dir / 'array/data.npy')
+        assert all([dset[0][0].shape == (3, 100), dset[0][1].shape == ()])
+

yews/datasets/base.py

@@ -121,3 +121,6 @@ class PathDataset(BaseDataset):
     def __init__(self, **kwargs):
         super(PathDataset, self).__init__(**kwargs)
         self.root = Path(self.root).resolve()
+        if not self.root.exists():
+            raise ValueError(f"{self.root} does not exists.")
+