Feature/unit test for validations

test/test_file_validator/test_forms.py

+"""Tests for the file_validator forms."""
 import csv
 import io
 
@@ -30,7 +31,6 @@ def test_missing_required_columns():
 
 def test_source_and_trader_type_validation(sample_input_file, mock_meo_database):
     """Test validation for Source and SYSTraderTranType columns."""
-
     csv_content = sample_input_file.read().decode("utf-8").splitlines()
     reader = csv.DictReader(csv_content)
     rows = list(reader)
@@ -54,7 +54,6 @@ def test_source_and_trader_type_validation(sample_input_file, mock_meo_database)
 
 def test_validate_nominal_analysis_account(sample_input_file, mock_meo_database):
     """Test validation for nominal analysis account."""
-
     csv_content = sample_input_file.read().decode("utf-8").splitlines()
     reader = csv.DictReader(csv_content)
     rows = list(reader)
@@ -69,8 +68,9 @@ def test_validate_nominal_analysis_account(sample_input_file, mock_meo_database)
 
     form = CSVUploadForm(files={"file": modified_file})
     assert not form.is_valid()
-    assert (f"Row 1: 'AccountNumber' must match 'Sample Narrative' in 'NominalAnalysisNominalAnalysisNarrative/1',"
-            f" but found 'Invalid Name'.") == form.errors["file"][0]
+    assert form.errors["file"][0] == (
+        "Row 1: 'AccountNumber' must match 'Sample Narrative' in 'NominalAnalysisNominalAnalysisNarrative/1'"
+        ", but found 'Invalid Name'.")
 
 
 def test_validate_nc_cc_dep_combination_against_meo_sage_account(sample_input_file, mock_meo_database):
@@ -90,5 +90,6 @@ def test_validate_nc_cc_dep_combination_against_meo_sage_account(sample_input_fi
 
     form = CSVUploadForm(files={"file": modified_file})
     assert not form.is_valid()
-    assert "Row 1: 'NominalAnalysisNominalCostCentre/1' (Invalid_CC) is not a valid cost centre." in str(form.errors["file"][0])
+    assert ("Row 1: 'NominalAnalysisNominalCostCentre/1' (Invalid_CC) is not a valid cost centre."
+            in str(form.errors["file"][0]))