add CalculateKPIS fixture and replace test 1 with it

Signed-off-by: anchit-chandran <anchit97123@gmail.com>

project/npda/tests/conftest.py

@@ -13,6 +13,7 @@
 from pytest_factoryboy import register
 
 # rcpch imports
+from project.npda.kpi_class.kpis import CalculateKPIS
 from project.npda.tests.factories import (NPDAUserFactory,
                                           OrganisationEmployerFactory,
                                           PaediatricsDiabetesUnitFactory,
@@ -32,19 +33,30 @@
 register(PaediatricsDiabetesUnitFactory)  # => npdauser_factory
 register(TransferFactory)  # => npdauser_factory
 
+
 @pytest.fixture(autouse=True)
 def patch_imd_for_postcode():
     """Automatically patch `imd_for_postcode` for all tests."""
-    with patch('project.npda.models.patient.imd_for_postcode', return_value=4) as mocked_imd_for_postcode:
+    with patch(
+        "project.npda.models.patient.imd_for_postcode", return_value=4
+    ) as mocked_imd_for_postcode:
         logger.debug("Patching imd_for_postcode")
         yield
 
+
 @pytest.fixture
 def AUDIT_START_DATE():
     """AUDIT_START_DATE is Day 2 of the first audit period"""
     return date(year=2024, month=4, day=1)
 
+
 @pytest.fixture
 def AUDIT_END_DATE():
     """AUDIT_END_DATE"""
-    return date(year=2025, month=3, day=31)
+    return date(year=2025, month=3, day=31)
+
+
+@pytest.fixture
+def CALCULATE_KPIS_OBJECT_AUDIT_START(AUDIT_START_DATE):
+    """Calculate KPIS object initialised with the audit start date"""
+    return CalculateKPIS(pz_codes=["PZ130"], calculation_date=AUDIT_START_DATE)