add test cases for embeddings (#1829)

tests/embeddings/test_ollama_embeddings.py

@@ -0,0 +1,43 @@
+import pytest
+from unittest.mock import Mock, patch
+from mem0.embeddings.ollama import OllamaEmbedding
+from mem0.configs.embeddings.base import BaseEmbedderConfig
+
+
+@pytest.fixture
+def mock_ollama_client():
+    with patch("mem0.embeddings.ollama.Client") as mock_ollama:
+        mock_client = Mock()
+        mock_client.list.return_value = {"models": [{"name": "nomic-embed-text"}]}
+        mock_ollama.return_value = mock_client
+        yield mock_client
+
+
+def test_embed_text(mock_ollama_client):
+    config = BaseEmbedderConfig(model="nomic-embed-text", embedding_dims=512)
+    embedder = OllamaEmbedding(config)
+
+    mock_response = {"embedding": [0.1, 0.2, 0.3, 0.4, 0.5]}
+    mock_ollama_client.embeddings.return_value = mock_response
+
+    text = "Sample text to embed."
+    embedding = embedder.embed(text)
+
+    mock_ollama_client.embeddings.assert_called_once_with(
+        model="nomic-embed-text", prompt=text
+    )
+
+    assert embedding == [0.1, 0.2, 0.3, 0.4, 0.5]
+
+
+def test_ensure_model_exists(mock_ollama_client):
+    config = BaseEmbedderConfig(model="nomic-embed-text", embedding_dims=512)
+    embedder = OllamaEmbedding(config)
+
+    mock_ollama_client.pull.assert_not_called()
+
+    mock_ollama_client.list.return_value = {"models": []}
+
+    embedder._ensure_model_exists()
+
+    mock_ollama_client.pull.assert_called_once_with("nomic-embed-text")