feat: Add inject_date flag to Agent for automatic date injection

Co-Authored-By: Joe Moura <joao@crewai.com>

tests/test_agent_inject_date.py

@@ -0,0 +1,55 @@
+import re
+from datetime import datetime
+from unittest.mock import patch, MagicMock
+
+from crewai.agent import Agent
+from crewai.task import Task
+
+
+def test_agent_inject_date():
+    """Test that the inject_date flag injects the current date into the task."""
+    agent = Agent(
+        role="test_agent",
+        goal="test_goal",
+        backstory="test_backstory",
+        inject_date=True,
+    )
+    
+    task = Task(
+        description="Test task",
+        expected_output="Test output",
+        agent=agent,
+    )
+    
+    with patch.object(Agent, 'execute_task', return_value="Task executed") as mock_execute:
+        agent.execute_task(task)
+        
+        called_task = mock_execute.call_args[0][0]
+        
+        current_date = datetime.now().strftime("%Y-%m-%d")
+        assert f"Current Date: {current_date}" in called_task.description
+
+
+def test_agent_without_inject_date():
+    """Test that without inject_date flag, no date is injected."""
+    agent = Agent(
+        role="test_agent",
+        goal="test_goal",
+        backstory="test_backstory",
+    )
+    
+    task = Task(
+        description="Test task",
+        expected_output="Test output",
+        agent=agent,
+    )
+    
+    original_description = task.description
+    
+    with patch.object(Agent, 'execute_task', return_value="Task executed") as mock_execute:
+        agent.execute_task(task)
+        
+        called_task = mock_execute.call_args[0][0]
+        
+        assert "Current Date:" not in called_task.description
+        assert called_task.description == original_description