micro-fix: remove obsolete _PushoverClient tests

- the test suite still referenced _PushoverClient, which no longer exists
- this caused import errors and failing pytest runs
- removed all tests related to _PushoverClient
- fixed pytest execution errors
- removed dead test code
- ensured test coverage reflects the current implementation

tools/src/aden_tools/tools/pushover_tool/tests/test_pushover_tool.py

@@ -1,98 +1,7 @@
-"""Tests for Pushover tool."""
-
 from unittest.mock import MagicMock, patch
-
-from aden_tools.tools.pushover_tool.pushover_tool import (
-    _PushoverClient,
-    register_tools,
-)
-
-
-class TestPushoverClient:
-    """Tests for _PushoverClient."""
-
-    def setup_method(self):
-        self.client = _PushoverClient(
-            token="test_token",
-            user_key="test_user_key",
-        )
-
-    def _mock_response(self, status_code=200, json_data=None):
-        mock = MagicMock()
-        mock.status_code = status_code
-        mock.json.return_value = json_data or {"status": 1, "request": "abc123"}
-        mock.text = "OK"
-        return mock
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_send_notification_success(self, mock_post):
-        mock_post.return_value = self._mock_response()
-        result = self.client.send_notification("Test message", title="Test")
-        assert result["status"] == 1
-        assert result["request"] == "abc123"
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_send_notification_emergency_priority(self, mock_post):
-        mock_post.return_value = self._mock_response()
-        _result = self.client.send_notification("Emergency!", priority=2)
-        call_kwargs = mock_post.call_args[1]["data"]
-        assert call_kwargs["retry"] == 30
-        assert call_kwargs["expire"] == 3600
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_send_notification_rate_limited(self, mock_post):
-        mock_post.return_value = self._mock_response(status_code=429)
-        result = self.client.send_notification("Test")
-        assert "error" in result
-        assert "Rate limit" in result["error"]
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_send_notification_api_error(self, mock_post):
-        mock_post.return_value = self._mock_response(
-            json_data={"status": 0, "errors": ["invalid token"]}
-        )
-        result = self.client.send_notification("Test")
-        assert "error" in result
-        assert "invalid token" in result["error"]
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_send_notification_with_url(self, mock_post):
-        mock_post.return_value = self._mock_response()
-        result = self.client.send_notification_with_url(
-            "Check this out",
-            url="https://example.com",
-            url_title="Example",
-        )
-        assert result["status"] == 1
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.get")
-    def test_get_sounds(self, mock_get):
-        mock_get.return_value = self._mock_response(
-            json_data={"status": 1, "sounds": {"pushover": "Pushover (default)"}}
-        )
-        result = self.client.get_sounds()
-        assert "sounds" in result
-        assert "pushover" in result["sounds"]
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_validate_user_success(self, mock_post):
-        mock_post.return_value = self._mock_response(
-            json_data={"status": 1, "devices": ["iphone", "android"]}
-        )
-        result = self.client.validate_user()
-        assert result["status"] == 1
-        assert "iphone" in result["devices"]
-
-    @patch("aden_tools.tools.pushover_tool.pushover_tool.httpx.post")
-    def test_validate_user_with_device(self, mock_post):
-        mock_post.return_value = self._mock_response(json_data={"status": 1, "devices": ["iphone"]})
-        _result = self.client.validate_user(device="iphone")
-        call_kwargs = mock_post.call_args[1]["data"]
-        assert call_kwargs["device"] == "iphone"
-
+from aden_tools.tools.pushover_tool.pushover_tool import register_tools
 
 class TestRegisterTools:
-    """Tests for register_tools MCP tool functions."""
 
     def setup_method(self):
         self.mcp = MagicMock()