Refactor mock campaign send reporting

tests/test_mock_campaign_helpers.py

@@ -0,0 +1,66 @@
+from __future__ import annotations
+
+import unittest
+from types import SimpleNamespace
+
+from govoplan_campaign.backend.dev.mock_campaign import (
+    _MockSendBatch,
+    _mock_send_steps,
+)
+
+
+class MockCampaignStepTests(unittest.TestCase):
+    def test_preview_marks_delivery_steps_as_skipped(self):
+        validation = SimpleNamespace(ok=True)
+        build = SimpleNamespace(
+            built_count=2,
+            queueable_count=2,
+            needs_review_count=0,
+            blocked_count=0,
+        )
+
+        steps = _mock_send_steps(
+            validation_report=validation,
+            validation_payload={"ok": True},
+            build_report=build,
+            send_batch=_MockSendBatch(results=[]),
+            send=False,
+            append_sent=True,
+        )
+
+        self.assertEqual(
+            [step["status"] for step in steps],
+            ["ok", "ok", "skipped", "skipped"],
+        )
+
+    def test_delivery_failures_require_review(self):
+        validation = SimpleNamespace(ok=False)
+        build = SimpleNamespace(
+            built_count=1,
+            queueable_count=0,
+            needs_review_count=1,
+            blocked_count=0,
+        )
+        batch = _MockSendBatch(
+            results=[],
+            failed_count=1,
+            imap_failed_count=1,
+        )
+
+        steps = _mock_send_steps(
+            validation_report=validation,
+            validation_payload={"ok": False},
+            build_report=build,
+            send_batch=batch,
+            send=True,
+            append_sent=True,
+        )
+
+        self.assertEqual(
+            [step["status"] for step in steps],
+            ["needs_review", "needs_review", "needs_review", "needs_review"],
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()