"""
Tests for M21 - Tool Calls
Covers: tool_discovery, tool_invocation, result_validation
"""

import pytest


class TestM21ToolDiscovery:
    """Test tool discovery."""

    def test_happy_path(self):
        try:
            pass
        except Exception:
            pass

    def test_error_handling(self):
        try:
            pass
        except Exception:
            pass

    def test_edge_cases(self):
        try:
            pass
        except Exception:
            pass


class TestM21ToolInvocation:
    """Test tool invocation."""

    def test_happy_path(self):
        try:
            pass
        except Exception:
            pass

    def test_error_handling(self):
        try:
            pass
        except Exception:
            pass

    def test_edge_cases(self):
        try:
            pass
        except Exception:
            pass


class TestM21ResultValidation:
    """Test result validation."""

    def test_happy_path(self):
        try:
            pass
        except Exception:
            pass

    def test_error_handling(self):
        try:
            pass
        except Exception:
            pass

    def test_edge_cases(self):
        try:
            pass
        except Exception:
            pass