Test the UMAP coordinates and sparse expression endpoints

Whole-response equality against literal dicts, as in
test_rnaseq_gene_expression.py. AT1G01010's expected dict has no key 45, so
anything filling in zeros fails; it is requested as At1g01010 to exercise the
case-insensitive collation the plain-equality query relies on.

Author: VinLau

tests/resources/test_umap_gene_expression.py

@@ -0,0 +1,64 @@
+from api import app
+from unittest import TestCase
+
+
+class TestIntegrations(TestCase):
+    def setUp(self):
+        self.app_client = app.test_client()
+
+    def test_get_arabidopsis_nie_umap_coordinates(self):
+        """This tests the UMAP coordinates returned for the Arabidopsis NIE UMAP database
+        :return:
+        """
+        # Valid data
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_umap")
+        expected = {
+            "wasSuccessful": True,
+            "data": {
+                "43": {"umap_1": -6.89231, "umap_2": 7.56863, "cell_type": "Metabolic stress state"},
+                "44": {"umap_1": 2.87577, "umap_2": -4.82349, "cell_type": "Dividing"},
+                "45": {"umap_1": -0.262505, "umap_2": -8.55344, "cell_type": "Guard"},
+                "46": {"umap_1": -4.5876, "umap_2": 6.05261, "cell_type": "Defense state"},
+            },
+        }
+        self.assertEqual(response.json, expected)
+
+        # Invalid database
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_um;ap")
+        expected = {"wasSuccessful": False, "error": "Invalid database"}
+        self.assertEqual(response.json, expected)
+
+    def test_get_arabidopsis_nie_umap_gene(self):
+        """This tests the sparse UMAP expression data returned for a gene. Cells with no key are zero.
+        :return:
+        """
+        # Valid data, with no expression in cell 45
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_umap/At1g01010")
+        expected = {"wasSuccessful": True, "data": {"43": 1.152292, "44": 1.546603, "46": 1.392931}}
+        self.assertEqual(response.json, expected)
+
+        # Valid data, with expression in every cell
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_umap/AT3G18780")
+        expected = {
+            "wasSuccessful": True,
+            "data": {"43": 1.673516, "44": 3.142986, "45": 1.490115, "46": 1.953491},
+        }
+        self.assertEqual(response.json, expected)
+
+        # Invalid gene
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_umap/At1g0101x")
+        expected = {"wasSuccessful": False, "error": "Invalid gene id"}
+        self.assertEqual(response.json, expected)
+
+        # Invalid database
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_um;ap/At1g01010")
+        expected = {"wasSuccessful": False, "error": "Invalid database"}
+        self.assertEqual(response.json, expected)
+
+        # No data for a valid gene
+        response = self.app_client.get("/umap_gene_expression/arabidopsis_NIE_umap/At1g01011")
+        expected = {
+            "wasSuccessful": False,
+            "error": "There are no data found for the given gene",
+        }
+        self.assertEqual(response.json, expected)