Update memory tests to handle optional ChromaDB dependency

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

tests/memory/long_term_memory_test.py

@@ -7,10 +7,28 @@ from crewai.memory.long_term.long_term_memory_item import LongTermMemoryItem
 @pytest.fixture
 def long_term_memory():
     """Fixture to create a LongTermMemory instance"""
+    try:
+        import chromadb
+        HAS_CHROMADB = True
+    except ImportError:
+        HAS_CHROMADB = False
+        
+    if not HAS_CHROMADB:
+        pytest.skip("ChromaDB is required for this test")
+        
     return LongTermMemory()
 
 
 def test_save_and_search(long_term_memory):
+    try:
+        import chromadb
+        HAS_CHROMADB = True
+    except ImportError:
+        HAS_CHROMADB = False
+        
+    if not HAS_CHROMADB:
+        pytest.skip("ChromaDB is required for this test")
+        
     memory = LongTermMemoryItem(
         agent="test_agent",
         task="test_task",

tests/memory/short_term_memory_test.py

@@ -12,6 +12,15 @@ from crewai.task import Task
 @pytest.fixture
 def short_term_memory():
     """Fixture to create a ShortTermMemory instance"""
+    try:
+        import chromadb
+        HAS_CHROMADB = True
+    except ImportError:
+        HAS_CHROMADB = False
+        
+    if not HAS_CHROMADB:
+        pytest.skip("ChromaDB is required for this test")
+        
     agent = Agent(
         role="Researcher",
         goal="Search relevant data and provide results",
@@ -29,6 +38,15 @@ def short_term_memory():
 
 
 def test_save_and_search(short_term_memory):
+    try:
+        import chromadb
+        HAS_CHROMADB = True
+    except ImportError:
+        HAS_CHROMADB = False
+        
+    if not HAS_CHROMADB:
+        pytest.skip("ChromaDB is required for this test")
+        
     memory = ShortTermMemoryItem(
         data="""test value test value test value test value test value test value
         test value test value test value test value test value test value