adding a test

tests/server/test_utils.py

@@ -0,0 +1,27 @@
+
+from NIPTool.server import create_app
+from NIPTool.server.utils import get_last_batches
+from NIPTool.adapter.plugin import NiptAdapter
+from datetime import datetime
+
+
+app = create_app(test= True)
+
+
+def test_get_last_batches(database):
+    app.db = database
+    app.adapter = NiptAdapter(database.client, db_name = database.name)
+
+    # GIVEN a database with four batch documents:
+    batch1 = {"_id":"201860", "SequencingDate":"2022-03-10"}
+    batch2 = {"_id":"201862", "SequencingDate":"2022-02-10"}
+    batch3 = {"_id":"201830", "SequencingDate":"2022-02-09"}
+    batch4 = {"_id":"101830", "SequencingDate":"2021-03-10"}
+
+    database.batch.insert_many([batch4, batch1, batch3, batch2])
+
+    # WHEN running get_last_batches with nr=2
+    results = get_last_batches(adapter=app.adapter, nr=2)
+
+    # THEN the results should contain the two batches with the latest SequencingDate
+    assert results == [batch1, batch2]