Chromium test is not a unit test

Relocate tests/unit/test_chromium.py to tests/integration/test_chromium.py.

The chromium test is not a unit test -- it has an external dependency on
Chromium. By relocating it to tests/integration, we ensure that the unit
tests run without errors.

This commit also contains some minor changes to suppress warnings from
strict type checkers.

Author: larsks

.github/workflows/chromium-validation.yaml renamed to .github/workflows/integration-tests.yaml

@@ -1,12 +1,12 @@
-name: Validate Chrome Integration
+name: Integration tests
 
 on:
   push:
   pull_request:
 
 jobs:
-  run-validation:
-    name: Run Integration Tests with Latest Chrome
+  run-integration-tests:
+    name: Run Integration Tests
     runs-on: ubuntu-latest
     env:
       CHROME_BIN_PATH: /usr/bin/chromium
@@ -24,11 +24,11 @@ jobs:
         run: |
           pip install -r requirements.txt
 
-      - name: Download and install latest Chrome
+      - name: Download and install latest Chromium
         run: |
           sudo apt-get update
           sudo apt-get install -y chromium
 
-      - name: Run PDF generation integration test
+      - name: Run integration tests
         run: |
-          python -m unittest process_report.tests.unit.test_chromium
+          python -m unittest discover -s process_report/tests/integration

process_report/tests/integration/__init__.py

@@ -1,4 +1,5 @@
 import os
+from typing import override
 
 import pandas as pd
 
@@ -8,6 +9,10 @@
 
 
 class TestPIInvoiceExport(BaseTestCaseWithTempDir):
+    invoice_month: str = ""
+    df: pd.DataFrame = pd.DataFrame()
+
+    @override
     def setUp(self):
         super().setUp()
         self.invoice_month = "2024-01"
@@ -42,7 +47,7 @@ def setUp(self):
 
     def test_pi_invoice_pdf_generation(self):
         pi_invoice = PIInvoice(
-            name=self.tempdir, invoice_month=self.invoice_month, data=self.df
+            name=str(self.tempdir), invoice_month=self.invoice_month, data=self.df
         )
         pi_invoice.process()
         pi_invoice.export()