core library (#711)

* move app creation to function

* create engine without load

* flake 8 fixes

* cleanup original scanpy test

* add default config

* handle missing data

* test data changes

* unify update

* load data isn't static anymore

* make app a class

server/test/test_scanpy_engine.py

@@ -12,7 +12,7 @@ from server.app.scanpy_engine.scanpy_engine import ScanpyEngine
 from server.app.util.errors import FilterError
 
 
-class UtilTest(unittest.TestCase):
+class EngineTest(unittest.TestCase):
     def setUp(self):
         args = {
             "layout": "umap",
@@ -22,9 +22,7 @@ class UtilTest(unittest.TestCase):
             "var_names": None,
             "diffexp_lfc_cutoff": 0.01,
         }
-
         self.data = ScanpyEngine("example-dataset/pbmc3k.h5ad", args)
-        self.data._create_schema()
 
     def test_init(self):
         self.assertEqual(self.data.cell_count, 2638)