` tag"
+ result = _markdown_to_telegram_html(text)
+ assert "
<div>" in result
+
+ def test_code_block(self) -> None:
+ text = """Here is code:
+```python
+def hello():
+ return "world"
+```
+Done.
+"""
+ result = _markdown_to_telegram_html(text)
+ assert "
" in result
+ assert "def hello():" in result
+ assert "
" in result
+
+ def test_code_block_escapes_html(self) -> None:
+ text = """```
+
test
+```"""
+ result = _markdown_to_telegram_html(text)
+ assert "<div>test</div>" in result
+
+ def test_headers_stripped(self) -> None:
+ text = "# Header 1\n## Header 2\n### Header 3"
+ result = _markdown_to_telegram_html(text)
+ assert "# Header 1" not in result
+ assert "Header 1" in result
+ assert "Header 2" in result
+ assert "Header 3" in result
+
+ def test_blockquotes_stripped(self) -> None:
+ text = "> This is a quote\nMore text"
+ result = _markdown_to_telegram_html(text)
+ assert "> " not in result
+ assert "This is a quote" in result
+
+ def test_links_converted(self) -> None:
+ text = "Check [this link](https://example.com) out"
+ result = _markdown_to_telegram_html(text)
+ assert '
this link' in result
+
+ def test_bullet_list_converted(self) -> None:
+ text = "- Item 1\n* Item 2"
+ result = _markdown_to_telegram_html(text)
+ assert "• Item 1" in result
+ assert "• Item 2" in result
+
+ def test_html_special_chars_escaped(self) -> None:
+ text = "5 < 10 and 10 > 5"
+ result = _markdown_to_telegram_html(text)
+ assert "5 < 10" in result
+ assert "10 > 5" in result
+
+ def test_complex_nested_formatting(self) -> None:
+ text = "**Bold _and italic_** and `code`"
+ result = _markdown_to_telegram_html(text)
+ assert "
Bold and italic" in result
+ assert "
code" in result
+
+
+class TestTelegramChannelSend:
+ """Tests for TelegramChannel.send() method."""
+
+ @pytest.mark.asyncio
+ async def test_send_short_message_single_chunk(self, monkeypatch) -> None:
+ """Short messages are sent as a single message."""
+ sent_messages = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ sent_messages.append({"chat_id": chat_id, "text": text, "parse_mode": parse_mode})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content="Hello world"
+ ))
+
+ assert len(sent_messages) == 1
+ assert sent_messages[0]["chat_id"] == 123456
+ assert "Hello world" in sent_messages[0]["text"]
+ assert sent_messages[0]["parse_mode"] == "HTML"
+
+ @pytest.mark.asyncio
+ async def test_send_long_message_split_into_chunks(self, monkeypatch) -> None:
+ """Long messages exceeding 4000 chars are split."""
+ sent_messages = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ sent_messages.append({"chat_id": chat_id, "text": text, "parse_mode": parse_mode})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ # Create a message longer than 4000 chars
+ long_content = "A" * 1000 + "\n" + "B" * 1000 + "\n" + "C" * 1000 + "\n" + "D" * 1000 + "\n" + "E" * 1000
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content=long_content
+ ))
+
+ assert len(sent_messages) == 2 # Should be split into 2 messages
+ assert all(m["chat_id"] == 123456 for m in sent_messages)
+
+ @pytest.mark.asyncio
+ async def test_send_splits_at_newline_when_possible(self, monkeypatch) -> None:
+ """Message splitting prefers newline boundaries."""
+ sent_messages = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ sent_messages.append({"chat_id": chat_id, "text": text, "parse_mode": parse_mode})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ # Create content with clear paragraph breaks
+ paragraphs = [f"Paragraph {i}: " + "x" * 100 for i in range(50)]
+ content = "\n".join(paragraphs)
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content=content
+ ))
+
+ # Each chunk should end with a complete paragraph (no partial lines)
+ for msg in sent_messages:
+ # Message should not start with whitespace after stripping
+ text = msg["text"]
+ assert text == text.lstrip()
+
+ @pytest.mark.asyncio
+ async def test_send_falls_back_to_space_boundary(self, monkeypatch) -> None:
+ """When no newline available, split at space boundary."""
+ sent_messages = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ sent_messages.append({"chat_id": chat_id, "text": text, "parse_mode": parse_mode})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ # Long content without newlines but with spaces
+ content = "word " * 2000 # ~10000 chars
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content=content
+ ))
+
+ assert len(sent_messages) >= 2
+
+ @pytest.mark.asyncio
+ async def test_send_forces_split_when_no_good_boundary(self, monkeypatch) -> None:
+ """When no newline or space, force split at max length."""
+ sent_messages = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ sent_messages.append({"chat_id": chat_id, "text": text, "parse_mode": parse_mode})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ # Long content without any spaces or newlines
+ content = "A" * 10000
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content=content
+ ))
+
+ assert len(sent_messages) >= 2
+ # Verify all chunks combined equal original
+ combined = "".join(m["text"] for m in sent_messages)
+ assert combined == content
+
+ @pytest.mark.asyncio
+ async def test_send_invalid_chat_id_logs_error(self, monkeypatch) -> None:
+ """Invalid chat_id should log error and not send."""
+ sent_messages = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ sent_messages.append({"chat_id": chat_id, "text": text})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="not-a-number",
+ content="Hello"
+ ))
+
+ assert len(sent_messages) == 0
+
+ @pytest.mark.asyncio
+ async def test_send_html_parse_error_falls_back_to_plain_text(self, monkeypatch) -> None:
+ """When HTML parsing fails, fall back to plain text."""
+ sent_messages = []
+ call_count = 0
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ nonlocal call_count
+ call_count += 1
+ if parse_mode == "HTML" and call_count == 1:
+ raise Exception("Bad markup")
+ sent_messages.append({"chat_id": chat_id, "text": text, "parse_mode": parse_mode})
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content="Hello **world**"
+ ))
+
+ # Should have 2 calls: first HTML (fails), second plain text (succeeds)
+ assert call_count == 2
+ assert len(sent_messages) == 1
+ assert sent_messages[0]["parse_mode"] is None # Plain text
+ assert "Hello **world**" in sent_messages[0]["text"]
+
+ @pytest.mark.asyncio
+ async def test_send_not_running_warns(self, monkeypatch) -> None:
+ """If bot not running, log warning."""
+ warning_logged = []
+
+ def mock_warning(msg, *args):
+ warning_logged.append(msg)
+
+ monkeypatch.setattr("nanobot.channels.telegram.logger", MagicMock(warning=mock_warning))
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = None # Not running
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content="Hello"
+ ))
+
+ assert any("not running" in str(m) for m in warning_logged)
+
+ @pytest.mark.asyncio
+ async def test_send_stops_typing_indicator(self, monkeypatch) -> None:
+ """Sending message should stop typing indicator."""
+ stopped_chats = []
+
+ class FakeBot:
+ async def send_message(self, chat_id, text, parse_mode=None):
+ pass
+
+ fake_app = MagicMock()
+ fake_app.bot = FakeBot()
+
+ channel = TelegramChannel(_make_config(), MessageBus())
+ channel._app = fake_app
+ channel._stop_typing = lambda chat_id: stopped_chats.append(chat_id)
+
+ await channel.send(OutboundMessage(
+ channel="telegram",
+ chat_id="123456",
+ content="Hello"
+ ))
+
+ assert "123456" in stopped_chats
+
+
+class TestTelegramChannelTyping:
+ """Tests for typing indicator functionality."""
+
+ @pytest.mark.asyncio
+ async def test_start_typing_creates_task(self) -> None:
+ channel = TelegramChannel(_make_config(), MessageBus())
+
+ # Mock _typing_loop to avoid actual async execution
+ channel._typing_loop = AsyncMock()
+
+ channel._start_typing("123456")
+
+ assert "123456" in channel._typing_tasks
+ assert not channel._typing_tasks["123456"].done()
+
+ # Clean up
+ channel._stop_typing("123456")
+
+ def test_stop_typing_cancels_task(self) -> None:
+ channel = TelegramChannel(_make_config(), MessageBus())
+
+ # Create a mock task
+ mock_task = MagicMock()
+ mock_task.done.return_value = False
+ channel._typing_tasks["123456"] = mock_task
+
+ channel._stop_typing("123456")
+
+ mock_task.cancel.assert_called_once()
+ assert "123456" not in channel._typing_tasks
+
+
+class TestTelegramChannelMediaExtensions:
+ """Tests for media file extension detection."""
+
+ def test_get_extension_from_mime_type(self) -> None:
+ channel = TelegramChannel(_make_config(), MessageBus())
+
+ assert channel._get_extension("image", "image/jpeg") == ".jpg"
+ assert channel._get_extension("image", "image/png") == ".png"
+ assert channel._get_extension("image", "image/gif") == ".gif"
+ assert channel._get_extension("audio", "audio/ogg") == ".ogg"
+ assert channel._get_extension("audio", "audio/mpeg") == ".mp3"
+
+ def test_get_extension_fallback_to_type(self) -> None:
+ channel = TelegramChannel(_make_config(), MessageBus())
+
+ assert channel._get_extension("image", None) == ".jpg"
+ assert channel._get_extension("voice", None) == ".ogg"
+ assert channel._get_extension("audio", None) == ".mp3"
+
+ def test_get_extension_unknown_type(self) -> None:
+ channel = TelegramChannel(_make_config(), MessageBus())
+
+ assert channel._get_extension("unknown", None) == ""