add patch iterator with mask test

tests/patch_iterator_test.py

@@ -7,9 +7,37 @@
 
 
 def test_patch_iterator():
-    with create_patch_iterator(
-        image_path="/tmp/TCGA-21-5784-01Z-00-DX1.tif",
-        patch_configuration=PatchConfiguration(spacings=(32,)),
-    ) as patch_iterator:
-        for patch in patch_iterator:
+    patch_configuration = PatchConfiguration(patch_shape=(1024,1024,3),
+                                            spacings=(0.5,),
+                                            overlap=(0,0),
+                                            offset=(0,0),
+                                            center=False)
+
+    with create_patch_iterator(image_path='/tmp/TCGA-21-5784-01Z-00-DX1.tif',
+                            patch_configuration=patch_configuration,
+                            cpus=4,
+                            backend='openslide') as patch_iterator:
+
+        print(f"Number of patches {len(patch_iterator)}\n")
+        assert len(patch_iterator) == 900
+        for idx, (patch, info) in enumerate(patch_iterator):
+            pass
+
+
+def test_patch_iterator_with_mask():
+    patch_configuration = PatchConfiguration(patch_shape=(1024,1024,3),
+                                            spacings=(0.5,),
+                                            overlap=(0,0),
+                                            offset=(0,0),
+                                            center=False)
+
+    with create_patch_iterator(image_path='/tmp/TCGA-21-5784-01Z-00-DX1.tif',
+                            mask_path='/tmp/TCGA-21-5784-01Z-00-DX1_tb_mask.tif',
+                            patch_configuration=patch_configuration,
+                            cpus=4,
+                            backend='asap') as patch_iterator:
+
+        print(f"Number of patches {len(patch_iterator)}\n")
+        assert len(patch_iterator) == 352
+        for idx, (patch, mask, info) in enumerate(patch_iterator):
             pass