add template encode test

tests/template_encode.py

@@ -0,0 +1,36 @@
+# Test Template Encode
+# Usage: python .\tests\template_encode.py --model_name_and_path D:\llm\chinese-alpaca-2-7b
+#                                          --template llama2_zh --query 'how are you?'
+#                                          --history '[[\"Hello!\",\"Hi，I am llama2.\"]]'
+
+import sys
+import fire
+from typing import List, Optional, Tuple
+from transformers import AutoTokenizer
+sys.path.append("./src")
+from llmtuner.extras.template import get_template_and_fix_tokenizer
+
+
+def encode(
+        model_name_and_path: str,
+        template: str,
+        query: str,
+        resp: Optional[str] = "",
+        history: Optional[List[Tuple[str, str]]] = None,
+        system: Optional[str] = None):
+    tokenizer = AutoTokenizer.from_pretrained(
+        model_name_and_path,
+        trust_remote_code=True
+    )
+
+    template = get_template_and_fix_tokenizer(template, tokenizer)
+
+    encoded_pairs = template.encode_multiturn(tokenizer, query, resp, history, system)
+    for prompt_ids, answer_ids in encoded_pairs:
+        print("="*50)
+        print("prompt_ids: {}, answer_ids: {}".format(prompt_ids, answer_ids))
+        print("prompt decode: {}".format(tokenizer.decode(prompt_ids)))
+
+
+if __name__ == '__main__':
+    fire.Fire(encode)