✨(domains) add periodic task to fetch domains status

Add celery crontab to check and update domains status.
This task calls dimail API.

src/backend/mailbox_manager/tests/test_tasks.py

@@ -0,0 +1,103 @@
+"""
+Unit tests for mailbox manager tasks.
+"""
+
+import json
+import re
+
+import pytest
+import responses
+
+from mailbox_manager import enums, factories, tasks
+
+from .fixtures.dimail import CHECK_DOMAIN_BROKEN_INTERNAL, CHECK_DOMAIN_OK
+
+pytestmark = pytest.mark.django_db
+
+
+@responses.activate
+def test_fetch_domain_status_task_success():  # pylint: disable=too-many-locals
+    """Test fetch domain status from dimail task"""
+
+    domain_enabled1 = factories.MailDomainEnabledFactory()
+    domain_enabled2 = factories.MailDomainEnabledFactory()
+    domain_disabled = factories.MailDomainFactory(
+        status=enums.MailDomainStatusChoices.DISABLED
+    )
+    domain_failed = factories.MailDomainFactory(
+        status=enums.MailDomainStatusChoices.FAILED
+    )
+
+    body_content_ok1 = CHECK_DOMAIN_OK.copy()
+    body_content_ok1["name"] = domain_enabled1.name
+
+    body_content_broken = CHECK_DOMAIN_BROKEN_INTERNAL.copy()
+    body_content_broken["name"] = domain_enabled2.name
+
+    body_content_ok2 = CHECK_DOMAIN_OK.copy()
+    body_content_ok2["name"] = domain_disabled.name
+
+    body_content_ok3 = CHECK_DOMAIN_OK.copy()
+    body_content_ok3["name"] = domain_failed.name
+    for domain, body_content in [
+        (domain_enabled1, body_content_ok1),
+        (domain_enabled2, body_content_broken),
+        (domain_failed, body_content_ok3),
+    ]:
+        # Mock dimail API with success response
+        responses.add(
+            responses.GET,
+            re.compile(rf".*/domains/{domain.name}/check/"),
+            body=json.dumps(body_content),
+            status=200,
+            content_type="application/json",
+        )
+    # domain_enabled2 is broken with internal error, we try to fix it
+    responses.add(
+        responses.GET,
+        re.compile(rf".*/domains/{domain_enabled2.name}/fix/"),
+        body=json.dumps(body_content_broken),
+        status=200,
+        content_type="application/json",
+    )
+    tasks.fetch_domains_status_task(enums.MailDomainStatusChoices.ENABLED)
+    tasks.fetch_domains_status_task(enums.MailDomainStatusChoices.FAILED)
+    tasks.fetch_domains_status_task(enums.MailDomainStatusChoices.ACTION_REQUIRED)
+    tasks.fetch_domains_status_task(enums.MailDomainStatusChoices.PENDING)
+    domain_enabled1.refresh_from_db()
+    domain_enabled2.refresh_from_db()
+    domain_disabled.refresh_from_db()
+    domain_failed.refresh_from_db()
+    # Nothing change for the first domain enable
+    assert domain_enabled1.status == enums.MailDomainStatusChoices.ENABLED
+    # Status of the second activated domain has changed to failure
+    assert domain_enabled2.status == enums.MailDomainStatusChoices.FAILED
+    # Status of the failed domain has changed to enabled
+    assert domain_failed.status == enums.MailDomainStatusChoices.ENABLED
+    # Disabled domain was excluded
+    assert domain_disabled.status == enums.MailDomainStatusChoices.DISABLED
+
+
+@responses.activate
+def test_fetch_domains_status_error_handling(caplog):
+    """Test fetch domain status from dimail task with error"""
+    caplog.set_level("ERROR")
+
+    domain = factories.MailDomainEnabledFactory()
+
+    # Mock dimail API with error response
+    responses.add(
+        responses.GET,
+        re.compile(rf".*/domains/{domain.name}/check/"),
+        body=json.dumps({"error": "Internal Server Error"}),
+        status=500,
+        content_type="application/json",
+    )
+
+    tasks.fetch_domains_status_task(enums.MailDomainStatusChoices.ENABLED)
+    domain.refresh_from_db()
+
+    # Domain status should remain unchanged
+    assert domain.status == enums.MailDomainStatusChoices.ENABLED
+    # Check that error was logged
+    assert f"Failed to fetch status for domain {domain.name}" in caplog.text