Fix: Migrate Gemini Embeddings (#3002)

Co-authored-by: Dev-Khant <devkhant24@gmail.com>

tests/embeddings/test_gemini_emeddings.py

@@ -0,0 +1,56 @@
+from unittest.mock import patch
+
+import pytest
+
+from mem0.configs.embeddings.base import BaseEmbedderConfig
+from mem0.embeddings.gemini import GoogleGenAIEmbedding
+
+
+@pytest.fixture
+def mock_genai():
+    with patch("mem0.embeddings.gemini.genai.embed_content") as mock_genai:
+        yield mock_genai
+
+
+@pytest.fixture
+def config():
+    return BaseEmbedderConfig(api_key="dummy_api_key", model="test_model", embedding_dims=786)
+
+
+def test_embed_query(mock_genai, config):
+    mock_embedding_response = {"embedding": [0.1, 0.2, 0.3, 0.4]}
+    mock_genai.return_value = mock_embedding_response
+
+    embedder = GoogleGenAIEmbedding(config)
+
+    text = "Hello, world!"
+    embedding = embedder.embed(text)
+
+    assert embedding == [0.1, 0.2, 0.3, 0.4]
+    mock_genai.assert_called_once_with(model="test_model", content="Hello, world!", output_dimensionality=786)
+
+def test_embed_returns_empty_list_if_none(mock_genai, config):
+    mock_genai.return_value = None
+
+    embedder = GoogleGenAIEmbedding(config)
+    result = embedder.embed("test")
+
+    assert result == []
+    mock_genai.assert_called_once()
+
+
+def test_embed_raises_on_error(mock_genai, config):
+    mock_genai.side_effect = RuntimeError("Embedding failed")
+
+    embedder = GoogleGenAIEmbedding(config)
+
+    with pytest.raises(RuntimeError, match="Embedding failed"):
+        embedder.embed("some input")
+
+def test_config_initialization(config):
+    embedder = GoogleGenAIEmbedding(config)
+
+    assert embedder.config.api_key == "dummy_api_key"
+    assert embedder.config.model == "test_model"
+    assert embedder.config.embedding_dims == 786
+