added unit test

Author: MinuraPunchihewa

tests/test_mindsdb/test_knowledgebase.py

@@ -2,6 +2,7 @@
 from mindsdb_sql_parser.ast.mindsdb.knowledge_base import (
     CreateKnowledgeBase,
     DropKnowledgeBase,
+    EvaluateKnowledgeBase
 )
 from mindsdb_sql_parser.ast import (
     Select,
@@ -370,3 +371,36 @@ def test_insert_into_knowledge_base(self):
             ),
         )
         assert ast == expected_ast
+
+    def test_evaluate_knowledge_base(self):
+        sql = """
+            EVALUATE my_knowledge_base
+            USING
+                TEST_TABLE = my_database.some_table_1,
+                SAVE_TO = my_database.some_table_2,
+                LLM = {
+                    "provider": "openai",
+                    "model": "gpt-3.5-turbo",
+                    "api_key": "my_api_key"
+                },
+                generate_data = {
+                    "from_sql": "SELECT content FROM my_database.some_table",
+                    "count": 100
+                }
+        """
+        ast = parse_sql(sql)
+        expected_ast = EvaluateKnowledgeBase(
+            name=Identifier("my_knowledge_base"),
+            test_table=Identifier(parts=["my_database", "some_table_1"]),
+            save_to=Identifier(parts=["my_database", "some_table_2"]),
+            llm={
+                "provider": "openai",
+                "model": "gpt-3.5-turbo",
+                "api_key": "my_api_key"
+            },
+            generate_data={
+                "from_sql": "SELECT content FROM my_database.some_table",
+                "count": 100
+            }
+        )
+        assert ast == expected_ast