onboarding: Replace channel messages in new organizations.

As a part of improving onboarding experience, this commit updates the channels and messages initially available in new orgs. Fixes #29297.
2024-03-26 18:28:30 +05:30 · 2024-03-26 18:28:30 +05:30 · ac2152fdfd
parent 7ea66dbec5
commit ac2152fdfd
15 changed files with 318 additions and 99 deletions
--- a/tools/lib/capitalization.py
+++ b/tools/lib/capitalization.py
@ -105,6 +105,12 @@ IGNORED_PHRASES = [
    r"^new channels$",
    r"^channel events$",
    r"^general$",
+    r"^sandbox$",
+    r"^experiments$",
+    r"^greetings$",
+    r"^moving messages$",
+    r"^start a conversation$",
+    r"^welcome to Zulip!$",
    # These are used as example short names (e.g. an uncapitalized context):
    r"^marketing$",
    r"^cookie$",
--- a/web/e2e-tests/message-basics.test.ts
+++ b/web/e2e-tests/message-basics.test.ts
@ -375,21 +375,28 @@ async function test_stream_search_filters_stream_list(page: Page): Promise<void>
    await page.waitForSelector((await get_stream_li(page, "Denmark")) + ".highlighted_stream", {
        hidden: true,
    });
+    await page.waitForSelector((await get_stream_li(page, "sandbox")) + ".highlighted_stream", {
+        hidden: true,
+    });
    await page.waitForSelector((await get_stream_li(page, "Venice")) + ".highlighted_stream", {
        hidden: true,
    });
    await page.waitForSelector((await get_stream_li(page, "Verona")) + ".highlighted_stream", {
        hidden: true,
    });
+    await page.waitForSelector((await get_stream_li(page, "Zulip")) + ".highlighted_stream", {
+        hidden: true,
+    });

    // Navigate through suggestions using arrow keys
    await arrow(page, "Down"); // core team -> Denmark
-    await arrow(page, "Down"); // Denmark -> Venice
-    await arrow(page, "Up"); // Venice -> Denmark
+    await arrow(page, "Down"); // Denmark -> sandbox
+    await arrow(page, "Up"); // sandbox -> Denmark
    await arrow(page, "Up"); // Denmark -> core team
    await arrow(page, "Up"); // core team -> core team
    await arrow(page, "Down"); // core team -> Denmark
-    await arrow(page, "Down"); // Denmark -> Venice
+    await arrow(page, "Down"); // Denmark -> sandbox
+    await arrow(page, "Down"); // sandbox-> Venice
    await arrow(page, "Down"); // Venice -> Verona

    await page.waitForSelector((await get_stream_li(page, "Verona")) + ".highlighted_stream", {
@ -405,6 +412,9 @@ async function test_stream_search_filters_stream_list(page: Page): Promise<void>
    await page.waitForSelector((await get_stream_li(page, "Venice")) + ".highlighted_stream", {
        hidden: true,
    });
+    await page.waitForSelector((await get_stream_li(page, "Zulip")) + ".highlighted_stream", {
+        hidden: true,
+    });
    await test_search_venice(page);

    // Search for beginning of "Verona".
--- a/zerver/actions/create_realm.py
+++ b/zerver/actions/create_realm.py
@ -278,20 +278,37 @@ def do_create_realm(

        maybe_enqueue_audit_log_upload(realm)

-    # Create stream once Realm object has been saved
+    # Create channels once Realm object has been saved
+    zulip_discussion_channel = ensure_stream(
+        realm,
+        str(Realm.ZULIP_DISCUSSION_CHANNEL_NAME),
+        stream_description=_("Questions and discussion about using Zulip."),
+        acting_user=None,
+    )
+    zulip_sandbox_channel = ensure_stream(
+        realm,
+        str(Realm.ZULIP_SANDBOX_CHANNEL_NAME),
+        stream_description=_("Experiment with Zulip here. :test_tube:"),
+        acting_user=None,
+    )
    new_stream_announcements_stream = ensure_stream(
        realm,
        str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
-        stream_description="Everyone is added to this stream by default. Welcome! :octopus:",
+        stream_description=_("For team-wide conversations"),
        acting_user=None,
    )
    # By default, 'New stream' & 'Zulip update' announcements are sent to the same stream.
    realm.new_stream_announcements_stream = new_stream_announcements_stream
    realm.zulip_update_announcements_stream = new_stream_announcements_stream

-    # With the current initial streams situation, the only public
-    # stream is the new_stream_announcements_stream.
-    DefaultStream.objects.create(stream=new_stream_announcements_stream, realm=realm)
+    # With the current initial streams situation, the public channels are
+    # 'zulip_discussion_channel', 'zulip_sandbox_channel', 'new_stream_announcements_stream'.
+    public_channels = [
+        DefaultStream(stream=zulip_discussion_channel, realm=realm),
+        DefaultStream(stream=zulip_sandbox_channel, realm=realm),
+        DefaultStream(stream=new_stream_announcements_stream, realm=realm),
+    ]
+    DefaultStream.objects.bulk_create(public_channels)

    # New realm is initialized with the latest zulip update announcements
    # level as it shouldn't receive a bunch of old updates.
--- a/zerver/lib/onboarding.py
+++ b/zerver/lib/onboarding.py
@ -263,44 +263,118 @@ def send_welcome_bot_response(send_request: SendMessageRequest) -> None:

@transaction.atomic
 def send_initial_realm_messages(realm: Realm) -> None:
+    # Sends the initial messages for a new organization.
+    #
+    # Technical note: Each stream created in the realm creation
+    # process should have at least one message declared in this
+    # function, to enforce the pseudo-invariant that every stream has
+    # at least one message.
    welcome_bot = get_system_bot(settings.WELCOME_BOT, realm.id)
-    # Make sure each stream created in the realm creation process has at least one message below
-    # Order corresponds to the ordering of the streams on the left sidebar, to make the initial Home
-    # view slightly less overwhelming
+
    with override_language(realm.default_language):
-        content1_of_topic_demonstration_topic_name = (
-            _(
-                "This is a message on channel #**{default_notification_channel_name}** with the "
-                "topic `topic demonstration`."
-            )
-        ).format(default_notification_channel_name=str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME))
-
-        content2_of_topic_demonstration_topic_name = (
-            _("Topics are a lightweight tool to keep conversations organized.")
-            + " "
-            + _(
-                "You can learn more about topics at [Introduction to topics]({about_topics_help_url})."
-            )
-        ).format(about_topics_help_url="/help/introduction-to-topics")
-
-        content_of_swimming_turtles_topic_name = (
-            _(
-                "This is a message on channel #**{default_notification_channel_name}** with the "
-                "topic `swimming turtles`."
-            )
-            + "\n"
-            "\n"
-            "[](/static/images/cute/turtle.png)"
-            "\n"
-            "\n"
-            + _(
-                "[Start a new topic]({start_topic_help_url}) any time you're not replying to a \
-            previous message."
-            )
+        # Content is declared here to apply translation properly.
+        #
+        # remove_single_newlines needs to be called on any multiline
+        # strings for them to render properly.
+        content1_of_moving_messages_topic_name = remove_single_newlines(
+            (
+                _("""
+If anything is out of place, it’s easy to [move messages]({move_content_another_topic_help_url}),
+[rename]({rename_topic_help_url}) and [split]({move_content_another_topic_help_url}) topics,
+or even move a topic [to a different channel]({move_content_another_channel_help_url}).
+""")
            ).format(
-            default_notification_channel_name=str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
-            start_topic_help_url="/help/introduction-to-topics#how-to-start-a-new-topic",
+                move_content_another_topic_help_url="/help/move-content-to-another-topic",
+                rename_topic_help_url="/help/rename-a-topic",
+                move_content_another_channel_help_url="/help/move-content-to-another-channel",
            )
+        )
+
+        content2_of_moving_messages_topic_name = _("""
+:point_right: Try moving this message to another topic and back!
+""")
+
+        content1_of_welcome_to_zulip_topic_name = _("""
+Zulip is organized to help you communicate more efficiently.
+""")
+
+        content2_of_welcome_to_zulip_topic_name = remove_single_newlines(
+            (
+                _("""
+In Zulip, **channels** determine who gets a message.
+
+Each conversation in a channel is labeled with a **topic**.  This message is in
+the #**{zulip_discussion_channel_name}** channel, in the "{topic_name}" topic, as you can
+see in the left sidebar and above.
+""")
+            ).format(
+                zulip_discussion_channel_name=str(Realm.ZULIP_DISCUSSION_CHANNEL_NAME),
+                topic_name=_("welcome to Zulip!"),
+            )
+        )
+
+        content3_of_welcome_to_zulip_topic_name = remove_single_newlines(
+            _("""
+You can read Zulip one conversation at a time, seeing each message in context,
+no matter how many other conversations are going on.
+""")
+        )
+
+        content4_of_welcome_to_zulip_topic_name = remove_single_newlines(
+            _("""
+:point_right: When you're ready, check out your [Inbox](/#inbox) for other
+conversations with unread messages. You can come back to this conversation
+if you need to from your **Starred** messages.
+""")
+        )
+
+        content1_of_start_conversation_topic_name = remove_single_newlines(
+            _("""
+To kick off a new conversation, click **Start new conversation** below.
+The new conversation thread won’t interrupt ongoing discussions.
+""")
+        )
+
+        content2_of_start_conversation_topic_name = _("""
+For a good topic name, think about finishing the sentence: “Hey, can we chat about…?”
+""")
+
+        content3_of_start_conversation_topic_name = _("""
+:point_right: Try starting a new conversation in this channel.
+""")
+
+        content1_of_experiments_topic_name = (
+            _("""
+:point_right:  Use this topic to try out [Zulip's messaging features]({format_message_help_url}).
+""")
+        ).format(format_message_help_url="/help/format-your-message-using-markdown")
+
+        content2_of_experiments_topic_name = (
+            _("""
+```spoiler Want to see some examples?
+
+````python
+print("code blocks")
+````
+
+- bulleted
+- lists
+
+Link to a conversation: #**{zulip_discussion_channel_name}>{topic_name}**
+```
+""")
+        ).format(
+            zulip_discussion_channel_name=str(Realm.ZULIP_DISCUSSION_CHANNEL_NAME),
+            topic_name=_("welcome to Zulip!"),
+        )
+
+        content1_of_greetings_topic_name = _("""
+This **greetings** topic is a great place to say "hi" :wave: to your teammates.
+""")
+
+        content2_of_greetings_topic_name = _("""
+:point_right:  Click on any message to start a reply in the same topic.
+""")

        content_of_zulip_update_announcements_topic_name = remove_single_newlines(
            (
@ -319,34 +393,94 @@ they can be disabled. [Learn more]({zulip_update_announcements_help_url}).
            )
        )

-    welcome_messages: List[Dict[str, str]] = [
+    welcome_messages: List[Dict[str, str]] = []
+
+    # Messages added to the "welcome messages" list last will be most
+    # visible to users, since welcome messages will likely be browsed
+    # via the right sidebar or recent conversations view, both of
+    # which are sorted newest-first.
+    #
+    # Initial messages are configured below.
+
+    # Zulip updates system advertisement.
+    welcome_messages += [
        {
-            "stream": str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
-            "topic_name": "topic demonstration",
-            "content": content1_of_topic_demonstration_topic_name,
-        },
-        {
-            "stream": str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
-            "topic_name": "topic demonstration",
-            "content": content2_of_topic_demonstration_topic_name,
-        },
-        {
-            "stream": str(realm.DEFAULT_NOTIFICATION_STREAM_NAME),
-            "topic_name": "swimming turtles",
-            "content": content_of_swimming_turtles_topic_name,
-        },
-        {
-            "stream": str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
+            "channel_name": str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
            "topic_name": str(Realm.ZULIP_UPDATE_ANNOUNCEMENTS_TOPIC_NAME),
            "content": content_of_zulip_update_announcements_topic_name,
        },
    ]

+    # Advertising moving messages.
+    welcome_messages += [
+        {
+            "channel_name": str(Realm.ZULIP_DISCUSSION_CHANNEL_NAME),
+            "topic_name": _("moving messages"),
+            "content": content,
+        }
+        for content in [
+            content1_of_moving_messages_topic_name,
+            content2_of_moving_messages_topic_name,
+        ]
+    ]
+
+    # Suggestion to start your first new conversation.
+    welcome_messages += [
+        {
+            "channel_name": str(realm.ZULIP_SANDBOX_CHANNEL_NAME),
+            "topic_name": _("start a conversation"),
+            "content": content,
+        }
+        for content in [
+            content1_of_start_conversation_topic_name,
+            content2_of_start_conversation_topic_name,
+            content3_of_start_conversation_topic_name,
+        ]
+    ]
+
+    # Suggestion to test messaging features.
+    # Dependency on knowing how to send messages.
+    welcome_messages += [
+        {
+            "channel_name": str(realm.ZULIP_SANDBOX_CHANNEL_NAME),
+            "topic_name": _("experiments"),
+            "content": content,
+        }
+        for content in [content1_of_experiments_topic_name, content2_of_experiments_topic_name]
+    ]
+
+    # Suggestion to send first message as a hi to your team.
+    welcome_messages += [
+        {
+            "channel_name": str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME),
+            "topic_name": _("greetings"),
+            "content": content,
+        }
+        for content in [content1_of_greetings_topic_name, content2_of_greetings_topic_name]
+    ]
+
+    # Main welcome message, this should be last.
+    welcome_messages += [
+        {
+            "channel_name": str(realm.ZULIP_DISCUSSION_CHANNEL_NAME),
+            "topic_name": _("welcome to Zulip!"),
+            "content": content,
+        }
+        for content in [
+            content1_of_welcome_to_zulip_topic_name,
+            content2_of_welcome_to_zulip_topic_name,
+            content3_of_welcome_to_zulip_topic_name,
+            content4_of_welcome_to_zulip_topic_name,
+        ]
+    ]
+
+    # End of message declarations; now we actually send them.
+
    messages = [
        internal_prep_stream_message_by_name(
            realm,
            welcome_bot,
-            message["stream"],
+            message["channel_name"],
            message["topic_name"],
            message["content"],
        )
@ -356,13 +490,15 @@ they can be disabled. [Learn more]({zulip_update_announcements_help_url}).
        sent_message_result.message_id for sent_message_result in do_send_messages(messages)
    ]

-    # We find the one of our just-sent messages with turtle.png in it,
-    # and react to it.  This is a bit hacky, but works and is kinda a
-    # 1-off thing.
-    turtle_message = Message.objects.select_for_update().get(
-        id__in=message_ids, content__icontains="cute/turtle.png"
+    # We find the one of our just-sent greetings messages, and react to it.
+    # This is a bit hacky, but works and is kinda a 1-off thing.
+    greetings_message = (
+        Message.objects.select_for_update()
+        .filter(id__in=message_ids, content__icontains='a great place to say "hi"')
+        .first()
    )
-    emoji_data = get_emoji_data(realm.id, "turtle")
+    assert greetings_message is not None
+    emoji_data = get_emoji_data(realm.id, "wave")
    do_add_reaction(
-        welcome_bot, turtle_message, "turtle", emoji_data.emoji_code, emoji_data.reaction_type
+        welcome_bot, greetings_message, "wave", emoji_data.emoji_code, emoji_data.reaction_type
    )
--- a/zerver/models/realms.py
+++ b/zerver/models/realms.py
@ -333,6 +333,8 @@ class Realm(models.Model):  # type: ignore[django-manager-missing] # django-stub
    # Defaults for new users
    default_language = models.CharField(default="en", max_length=MAX_LANGUAGE_ID_LENGTH)

+    ZULIP_DISCUSSION_CHANNEL_NAME = gettext_lazy("Zulip")
+    ZULIP_SANDBOX_CHANNEL_NAME = gettext_lazy("sandbox")
    DEFAULT_NOTIFICATION_STREAM_NAME = gettext_lazy("general")
    STREAM_EVENTS_NOTIFICATION_TOPIC_NAME = gettext_lazy("channel events")
    new_stream_announcements_stream = models.ForeignKey(
--- a/zerver/openapi/python_examples.py
+++ b/zerver/openapi/python_examples.py
@ -161,7 +161,7 @@ def get_presence(client: Client) -> None:
 def add_default_stream(client: Client) -> None:
    # {code_example|start}
    # Add a stream to the set of default streams for new users.
-    stream_id = 4
+    stream_id = 10

    result = client.add_default_stream(stream_id)
    # {code_example|end}
@ -173,7 +173,7 @@ def add_default_stream(client: Client) -> None:
 def remove_default_stream(client: Client) -> None:
    # {code_example|start}
    # Remove a stream from the set of default streams for new users.
-    request = {"stream_id": 4}
+    request = {"stream_id": 10}

    result = client.call_endpoint(
        url="/default_streams",
@ -321,7 +321,7 @@ def send_invitations(client: Client) -> None:
        "invitee_emails": "example@zulip.com, logan@zulip.com",
        "invite_expires_in_minutes": 60 * 24 * 10,  # 10 days
        "invite_as": 400,
-        "stream_ids": [1, 5, 6],
+        "stream_ids": [1, 11, 12],
    }
    result = client.call_endpoint(url="/invites", method="POST", request=request)
    # {code_example|end}
@ -336,7 +336,7 @@ def create_reusable_invitation_link(client: Client) -> None:
    request = {
        "invite_expires_in_minutes": 60 * 24 * 10,  # 10 days
        "invite_as": 400,
-        "stream_ids": [1, 5, 6],
+        "stream_ids": [1, 11, 12],
    }
    result = client.call_endpoint(url="/invites/multiuse", method="POST", request=request)
    # {code_example|end}
@ -350,7 +350,7 @@ def revoke_email_invitation(client: Client) -> None:
        "invitee_emails": "delete-invite@zulip.com",
        "invite_expires_in_minutes": 14400,  # 10 days
        "invite_as": 400,
-        "stream_ids": [1, 5, 6],
+        "stream_ids": [1, 11, 12],
    }
    result = client.call_endpoint(url="/invites", method="POST", request=request)

@ -668,7 +668,7 @@ def get_streams(client: Client) -> None:
    # {code_example|end}

    validate_against_openapi_schema(result, "/streams", "get", "200")
-    assert len(result["streams"]) == 5
+    assert len(result["streams"]) == 7


@openapi_test_function("/streams/{stream_id}:patch")
@ -915,7 +915,7 @@ def update_subscription_settings(client: Client) -> None:
            "value": True,
        },
        {
-            "stream_id": 4,
+            "stream_id": 10,
            "property": "color",
            "value": "#f00f00",
        },
--- a/zerver/openapi/zulip.yaml
+++ b/zerver/openapi/zulip.yaml
@ -5879,7 +5879,7 @@ paths:
                      items:
                        type: integer
                      minLength: 1
-                  example: 5
+                  example: 11
                content:
                  description: |
                    The updated content of the scheduled message.
@ -6022,7 +6022,7 @@ paths:
                  description: |
                    The ID of the target stream.
                  type: integer
-                  example: 4
+                  example: 10
              required:
                - stream_id
            encoding:
@ -6073,7 +6073,7 @@ paths:
                  description: |
                    The ID of the target stream.
                  type: integer
-                  example: 4
+                  example: 10
              required:
                - stream_id
            encoding:
@ -11977,7 +11977,7 @@ paths:
                  type: array
                  items:
                    type: integer
-                  example: [1, 4]
+                  example: [1, 10]
              required:
                - invitee_emails
                - stream_ids
@ -12115,7 +12115,7 @@ paths:
                  items:
                    type: integer
                  default: []
-                  example: [1, 4]
+                  example: [1, 10]
            encoding:
              invite_expires_in_minutes:
                contentType: application/json
--- a/zerver/tests/test_audit_log.py
+++ b/zerver/tests/test_audit_log.py
@ -113,7 +113,7 @@ class TestRealmAuditLog(ZulipTestCase):
        do_activate_mirror_dummy_user(user, acting_user=user)
        do_deactivate_user(user, acting_user=user)
        do_reactivate_user(user, acting_user=user)
-        self.assertEqual(RealmAuditLog.objects.filter(event_time__gte=now).count(), 8)
+        self.assertEqual(RealmAuditLog.objects.filter(event_time__gte=now).count(), 10)
        event_types = list(
            RealmAuditLog.objects.filter(
                realm=realm,
--- a/zerver/tests/test_digest.py
+++ b/zerver/tests/test_digest.py
@ -82,10 +82,10 @@ class TestDigestEmailMessages(ZulipTestCase):
        # are 3 reused streams and one new one, for a net of two fewer
        # than before.
        iago = self.example_user("iago")
-        with self.assert_database_query_count(8):
+        with self.assert_database_query_count(10):
            bulk_handle_digest_email([iago.id], cutoff)
        self.assertEqual(get_recent_topics.cache_info().hits, 3)
-        self.assertEqual(get_recent_topics.cache_info().currsize, 4)
+        self.assertEqual(get_recent_topics.cache_info().currsize, 6)

        # Two users in the same batch, with only one new stream from
        # the above.
@ -94,7 +94,7 @@ class TestDigestEmailMessages(ZulipTestCase):
        with self.assert_database_query_count(9):
            bulk_handle_digest_email([cordelia.id, prospero.id], cutoff)
        self.assertEqual(get_recent_topics.cache_info().hits, 7)
-        self.assertEqual(get_recent_topics.cache_info().currsize, 5)
+        self.assertEqual(get_recent_topics.cache_info().currsize, 7)

        # If we use a different cutoff, it clears the cache.
        with self.assert_database_query_count(12):
@ -241,7 +241,7 @@ class TestDigestEmailMessages(ZulipTestCase):
            digest_user_ids = [user.id for user in digest_users]

            get_recent_topics.cache_clear()
-            with self.assert_database_query_count(14):
+            with self.assert_database_query_count(16):
                with self.assert_memcached_count(0):
                    bulk_handle_digest_email(digest_user_ids, cutoff)

--- a/zerver/tests/test_import_export.py
+++ b/zerver/tests/test_import_export.py
@ -448,7 +448,16 @@ class RealmImportExportTest(ExportFile):
        exported_streams = self.get_set(data["zerver_stream"], "name")
        self.assertEqual(
            exported_streams,
-            {"Denmark", "Rome", "Scotland", "Venice", "Verona", "core team"},
+            {
+                "Denmark",
+                "Rome",
+                "Scotland",
+                "Venice",
+                "Verona",
+                "core team",
+                "Zulip",
+                "sandbox",
+            },
        )

        exported_alert_words = data["zerver_alertword"]
@ -648,6 +657,8 @@ class RealmImportExportTest(ExportFile):
                "Scotland",
                "Venice",
                "Verona",
+                "Zulip",
+                "sandbox",
                "Private A",
                "Private B",
                "Private C",
@ -668,7 +679,15 @@ class RealmImportExportTest(ExportFile):
        exported_message = self.find_by_id(data["zerver_message"], um.message_id)
        self.assertEqual(exported_message["content"], um.message.content)

-        public_stream_names = ["Denmark", "Rome", "Scotland", "Venice", "Verona"]
+        public_stream_names = [
+            "Denmark",
+            "Rome",
+            "Scotland",
+            "Venice",
+            "Verona",
+            "Zulip",
+            "sandbox",
+        ]
        public_stream_ids = Stream.objects.filter(name__in=public_stream_names).values_list(
            "id", flat=True
        )
--- a/zerver/tests/test_invite.py
+++ b/zerver/tests/test_invite.py
@ -793,7 +793,7 @@ class InviteUserTest(InviteUserBase):
        self.assertTrue(find_key_by_email(invitee))

        default_streams = get_default_streams_for_realm_as_dicts(realm.id)
-        self.assert_length(default_streams, 1)
+        self.assert_length(default_streams, 3)

        self.submit_reg_form_for_user(invitee, "password")
        # If no streams are provided, user is not subscribed to
@ -2409,7 +2409,7 @@ class MultiuseInviteTest(ZulipTestCase):
        invite_link = self.generate_multiuse_invite_link(streams=streams)
        self.check_user_able_to_register(email3, invite_link)
        # User is not subscribed to default streams as well.
-        self.assert_length(get_default_streams_for_realm_as_dicts(self.realm.id), 1)
+        self.assert_length(get_default_streams_for_realm_as_dicts(self.realm.id), 3)
        self.check_user_subscribed_only_to_streams(name3, [])

    def test_multiuse_link_different_realms(self) -> None:
@ -2478,7 +2478,7 @@ class MultiuseInviteTest(ZulipTestCase):
        invite_link = self.assert_json_success(result)["invite_link"]
        self.check_user_able_to_register(self.nonreg_email("alice"), invite_link)
        # User is not subscribed to default streams as well.
-        self.assert_length(get_default_streams_for_realm_as_dicts(self.realm.id), 1)
+        self.assert_length(get_default_streams_for_realm_as_dicts(self.realm.id), 3)
        self.check_user_subscribed_only_to_streams("alice", [])

    def test_multiuse_invite_without_permission_to_subscribe_others(self) -> None:
--- a/zerver/tests/test_signup.py
+++ b/zerver/tests/test_signup.py
@ -1303,7 +1303,8 @@ class RealmCreationTest(ZulipTestCase):

        # Check welcome messages
        for stream_name, text, message_count in [
-            (str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME), "with the topic", 4),
+            (str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME), "learn about new features", 3),
+            (str(Realm.ZULIP_SANDBOX_CHANNEL_NAME), "new conversation thread", 5),
        ]:
            stream = get_stream(stream_name, realm)
            recipient = stream.recipient
@ -1739,10 +1740,12 @@ class RealmCreationTest(ZulipTestCase):
        # TODO: When Italian translated strings are updated for changes
        # that are part of the stream -> channel rename, uncomment below.
        # # Check welcome messages
-        # with_the_topic_in_italian = "con l'argomento"
+        # learn_about_new_features_in_italian = "conoscere le nuove funzionalità"
+        # new_conversation_thread_in_italian = "nuovo thread di conversazione"

        # for stream_name, text, message_count in [
-        #     (str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME), with_the_topic_in_italian, 4),
+        #     (str(Realm.DEFAULT_NOTIFICATION_STREAM_NAME), learn_about_new_features_in_italian, 3),
+        #     (str(Realm.ZULIP_SANDBOX_CHANNEL_NAME), new_conversation_thread_in_italian, 5),
        # ]:
        #     stream = get_stream(stream_name, realm)
        #     recipient = stream.recipient
@ -2560,9 +2563,11 @@ class UserSignUpTest(ZulipTestCase):
        default_streams = []

        existing_default_streams = DefaultStream.objects.filter(realm=realm)
-        self.assert_length(existing_default_streams, 1)
-        self.assertEqual(existing_default_streams[0].stream.name, "Verona")
-        default_streams.append(existing_default_streams[0].stream)
+        self.assert_length(existing_default_streams, 3)
+        expected_default_streams = ["Zulip", "sandbox", "Verona"]
+        for i, expected_default_stream in enumerate(expected_default_streams):
+            self.assertEqual(existing_default_streams[i].stream.name, expected_default_stream)
+            default_streams.append(existing_default_streams[i].stream)

        for stream_name in ["venice", "rome"]:
            stream = get_stream(stream_name, realm)
--- a/zerver/tests/test_subs.py
+++ b/zerver/tests/test_subs.py
@ -5633,7 +5633,16 @@ class GetStreamsTest(ZulipTestCase):

        self.assertEqual(
            stream_names,
-            {"Venice", "Denmark", "Scotland", "Verona", "Rome", "core team"},
+            {
+                "Venice",
+                "Denmark",
+                "Scotland",
+                "Verona",
+                "Rome",
+                "core team",
+                "Zulip",
+                "sandbox",
+            },
        )

    def test_public_streams_api(self) -> None:
--- a/zerver/tests/test_users.py
+++ b/zerver/tests/test_users.py
@ -622,9 +622,9 @@ class PermissionTest(ZulipTestCase):
            if new_role in [UserProfile.ROLE_REALM_ADMINISTRATOR, UserProfile.ROLE_REALM_OWNER]:
                # If the new role is owner or admin, the peer_add event will be
                # sent for one private stream as well.
-                num_events += 5
+                num_events += 7
            else:
-                num_events += 4
+                num_events += 6
        elif new_role in [
            UserProfile.ROLE_REALM_ADMINISTRATOR,
            UserProfile.ROLE_REALM_OWNER,
--- a/zilencer/management/commands/populate_db.py
+++ b/zilencer/management/commands/populate_db.py
@ -622,6 +622,9 @@ class Command(BaseCommand):
            create_if_missing_realm_internal_bots()

            # Create streams.
+            zulip_discussion_channel_name = str(Realm.ZULIP_DISCUSSION_CHANNEL_NAME)
+            zulip_sandbox_channel_name = str(Realm.ZULIP_SANDBOX_CHANNEL_NAME)
+
            stream_list = [
                "Verona",
                "Denmark",
@ -629,6 +632,8 @@ class Command(BaseCommand):
                "Venice",
                "Rome",
                "core team",
+                zulip_discussion_channel_name,
+                zulip_sandbox_channel_name,
            ]
            stream_dict: Dict[str, Dict[str, Any]] = {
                "Denmark": {"description": "A Scandinavian country"},
@ -662,12 +667,20 @@ class Command(BaseCommand):
                subscriptions_map = {
                    "AARON@zulip.com": ["Verona"],
                    "cordelia@zulip.com": ["Verona"],
-                    "hamlet@zulip.com": ["Verona", "Denmark", "core team"],
+                    "hamlet@zulip.com": [
+                        "Verona",
+                        "Denmark",
+                        "core team",
+                        zulip_discussion_channel_name,
+                        zulip_sandbox_channel_name,
+                    ],
                    "iago@zulip.com": [
                        "Verona",
                        "Denmark",
                        "Scotland",
                        "core team",
+                        zulip_discussion_channel_name,
+                        zulip_sandbox_channel_name,
                    ],
                    "othello@zulip.com": ["Verona", "Denmark", "Scotland"],
                    "prospero@zulip.com": ["Verona", "Denmark", "Scotland", "Venice"],
@ -678,6 +691,8 @@ class Command(BaseCommand):
                        "Denmark",
                        "Venice",
                        "core team",
+                        zulip_discussion_channel_name,
+                        zulip_sandbox_channel_name,
                    ],
                    "shiva@zulip.com": ["Verona", "Denmark", "Scotland"],
                }