Harrison/tf embeddings (#817)

Co-authored-by: Ryohei Kuroki <10434946+yakigac@users.noreply.github.com>

tests/integration_tests/embeddings/test_tensorflow_hub.py

@@ -0,0 +1,19 @@
+"""Test TensorflowHub embeddings."""
+from langchain.embeddings import TensorflowHubEmbeddings
+
+
+def test_tensorflowhub_embedding_documents() -> None:
+    """Test tensorflowhub embeddings."""
+    documents = ["foo bar"]
+    embedding = TensorflowHubEmbeddings()
+    output = embedding.embed_documents(documents)
+    assert len(output) == 1
+    assert len(output[0]) == 512
+
+
+def test_tensorflowhub_embedding_query() -> None:
+    """Test tensorflowhub embeddings."""
+    document = "foo bar"
+    embedding = TensorflowHubEmbeddings()
+    output = embedding.embed_query(document)
+    assert len(output) == 512