mypy: Enable truthy-bool errors.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

corporate/tests/test_stripe.py

@@ -4706,7 +4706,7 @@ class InvoiceTest(StripeTestCase):
     def test_invoice_plan_without_stripe_customer(self) -> None:
         self.local_upgrade(self.seat_count, True, CustomerPlan.ANNUAL, False, False)
         plan = get_current_plan_by_realm(get_realm("zulip"))
-        assert plan and plan.customer
+        assert plan is not None
         plan.customer.stripe_customer_id = None
         plan.customer.save(update_fields=["stripe_customer_id"])
         with self.assertRaises(BillingError) as context:

pyproject.toml

@@ -27,6 +27,7 @@ warn_return_any = false
 # Enable optional errors.
 enable_error_code = [
     "redundant-expr",
+    "truthy-bool",
 ]
 
 # Display the codes needed for # type: ignore[code] annotations.

zerver/actions/message_send.py

@@ -1396,7 +1396,7 @@ def check_message(
 
     elif addressee.is_private():
         user_profiles = addressee.user_profiles()
-        mirror_message = client and client.name in [
+        mirror_message = client.name in [
             "zephyr_mirror",
             "irc_mirror",
             "jabber_mirror",

zerver/tests/test_custom_profile_data.py

@@ -754,7 +754,6 @@ class ListCustomProfileFieldTest(CustomProfileFieldTestCase):
         iago = self.example_user("iago")
         test_bot = self.create_test_bot("foo-bot", iago)
         self.login_user(iago)
-        assert test_bot
 
         with queries_captured() as queries:
             response = self.client_get(

zerver/tests/test_import_export.py

@@ -644,7 +644,6 @@ class RealmImportExportTest(ExportFile):
             realm_emoji = check_add_realm_emoji(
                 realm=hamlet.realm, name="hawaii", author=hamlet, image_file=img_file
             )
-            assert realm_emoji
             self.assertEqual(realm_emoji.name, "hawaii")
 
         # Deactivate a user to ensure such a case is covered.
@@ -801,7 +800,7 @@ class RealmImportExportTest(ExportFile):
             imported_realm_result = f(imported_realm)
             # orig_realm_result should be truthy and have some values, otherwise
             # the test is kind of meaningless
-            assert orig_realm_result
+            assert orig_realm_result  # type: ignore[truthy-bool] # see above
 
             # It may be helpful to do print(f.__name__) if you are having
             # trouble debugging this.

zerver/tests/test_transfer.py

@@ -88,8 +88,6 @@ class TransferUploadsToS3Test(ZulipTestCase):
 
         with get_test_image_file("img.png") as image_file:
             emoji = check_add_realm_emoji(othello.realm, emoji_name, othello, image_file)
-        if not emoji:
-            raise AssertionError("Unable to add emoji.")
 
         emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
             realm_id=othello.realm_id,
@@ -115,8 +113,6 @@ class TransferUploadsToS3Test(ZulipTestCase):
 
         with get_test_image_file("animated_img.gif") as image_file:
             emoji = check_add_realm_emoji(othello.realm, emoji_name, othello, image_file)
-        if not emoji:
-            raise AssertionError("Unable to add emoji.")
 
         emoji_path = RealmEmoji.PATH_ID_TEMPLATE.format(
             realm_id=othello.realm_id,

zerver/webhooks/jira/view.py

@@ -78,7 +78,6 @@ def convert_jira_markup(content: str, realm: Realm) -> str:
     # Try to convert a Jira user mention of format [~username] into a
     # Zulip user mention. We don't know the email, just the Jira username,
     # so we naively guess at their Zulip account using this
-    if realm:
     mention_re = re.compile("\\[~(.*?)\\]")
     for username in mention_re.findall(content):
         # Try to look up username