add test for vertex basic pass throgh

tests/pass_through_tests/test_vertex_ai.py

@@ -0,0 +1,77 @@
+"""
+Test Vertex AI Pass Through
+
+1. use Credentials client side, Assert SpendLog was created
+"""
+
+import vertexai
+from vertexai.preview.generative_models import GenerativeModel
+import tempfile
+import json
+import os
+from google.oauth2 import service_account
+import google.auth.transport.requests
+
+
+# Path to your service account JSON file
+SERVICE_ACCOUNT_FILE = "path/to/your/service-account.json"
+
+
+def load_vertex_ai_credentials():
+    # Define the path to the vertex_key.json file
+    print("loading vertex ai credentials")
+    filepath = os.path.dirname(os.path.abspath(__file__))
+    vertex_key_path = filepath + "/vertex_key.json"
+
+    # Read the existing content of the file or create an empty dictionary
+    try:
+        with open(vertex_key_path, "r") as file:
+            # Read the file content
+            print("Read vertexai file path")
+            content = file.read()
+
+            # If the file is empty or not valid JSON, create an empty dictionary
+            if not content or not content.strip():
+                service_account_key_data = {}
+            else:
+                # Attempt to load the existing JSON content
+                file.seek(0)
+                service_account_key_data = json.load(file)
+    except FileNotFoundError:
+        # If the file doesn't exist, create an empty dictionary
+        service_account_key_data = {}
+
+    # Update the service_account_key_data with environment variables
+    private_key_id = os.environ.get("VERTEX_AI_PRIVATE_KEY_ID", "")
+    private_key = os.environ.get("VERTEX_AI_PRIVATE_KEY", "")
+    private_key = private_key.replace("\\n", "\n")
+    service_account_key_data["private_key_id"] = private_key_id
+    service_account_key_data["private_key"] = private_key
+
+    # Create a temporary file
+    with tempfile.NamedTemporaryFile(mode="w+", delete=False) as temp_file:
+        # Write the updated content to the temporary files
+        json.dump(service_account_key_data, temp_file, indent=2)
+
+    # Export the temporary file as GOOGLE_APPLICATION_CREDENTIALS
+    os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = os.path.abspath(temp_file.name)
+
+
+LITE_LLM_ENDPOINT = "http://localhost:4000"
+
+
+async def test_basic_vertex_ai_pass_through_with_spendlog():
+
+    vertexai.init(
+        project="adroit-crow-413218",
+        location="us-central1",
+        api_endpoint=f"{LITE_LLM_ENDPOINT}/vertex-ai",
+        api_transport="rest",
+    )
+
+    model = GenerativeModel(model_name="gemini-1.0-pro")
+    response = model.generate_content("hi")
+
+    print("response", response)
+
+    pass