nits (#210)

use json.dump

move test to integration tests (since it requires huggingface_hub)

tests/integration_tests/embeddings/test_huggingface_hub.py

@@ -1,4 +1,6 @@
 """Test HuggingFaceHub embeddings."""
+import pytest
+
 from langchain.embeddings import HuggingFaceHubEmbeddings
 
 
@@ -17,3 +19,10 @@ def test_huggingfacehub_embedding_query() -> None:
     embedding = HuggingFaceHubEmbeddings()
     output = embedding.embed_query(document)
     assert len(output) == 768
+
+
+def test_huggingfacehub_embedding_invalid_repo() -> None:
+    """Test huggingfacehub embedding repo id validation."""
+    # Only sentence-transformers models are currently supported.
+    with pytest.raises(ValueError):
+        HuggingFaceHubEmbeddings(repo_id="allenai/specter")