Add pinecone integration test (#911)

Basic integration test for pinecone

tests/integration_tests/vectorstores/test_pinecone.py

@@ -0,0 +1,59 @@
+"""Test Pinecone functionality."""
+import pinecone
+
+from langchain.docstore.document import Document
+from langchain.vectorstores.pinecone import Pinecone
+from tests.integration_tests.vectorstores.fake_embeddings import FakeEmbeddings
+
+pinecone.init(api_key="YOUR_API_KEY", environment="YOUR_ENV")
+
+index = pinecone.Index("langchain-demo")
+
+
+def test_pinecone() -> None:
+    """Test end to end construction and search."""
+    texts = ["foo", "bar", "baz"]
+    docsearch = Pinecone.from_texts(
+        texts, FakeEmbeddings(), index_name="langchain-demo", namespace="test"
+    )
+    output = docsearch.similarity_search("foo", k=1, namespace="test")
+    assert output == [Document(page_content="foo")]
+
+
+def test_pinecone_with_metadatas() -> None:
+    """Test end to end construction and search."""
+    texts = ["foo", "bar", "baz"]
+    metadatas = [{"page": i} for i in range(len(texts))]
+    docsearch = Pinecone.from_texts(
+        texts,
+        FakeEmbeddings(),
+        index_name="langchain-demo",
+        metadatas=metadatas,
+        namespace="test-metadata",
+    )
+    output = docsearch.similarity_search("foo", k=1, namespace="test-metadata")
+    assert output == [Document(page_content="foo", metadata={"page": 0})]
+
+
+def test_pinecone_with_scores() -> None:
+    """Test end to end construction and search with scores and IDs."""
+    texts = ["foo", "bar", "baz"]
+    metadatas = [{"page": i} for i in range(len(texts))]
+    docsearch = Pinecone.from_texts(
+        texts,
+        FakeEmbeddings(),
+        index_name="langchain-demo",
+        metadatas=metadatas,
+        namespace="test-metadata-score",
+    )
+    output = docsearch.similarity_search_with_score(
+        "foo", k=3, namespace="test-metadata-score"
+    )
+    docs = [o[0] for o in output]
+    scores = [o[1] for o in output]
+    assert docs == [
+        Document(page_content="foo", metadata={"page": 0}),
+        Document(page_content="bar", metadata={"page": 1}),
+        Document(page_content="baz", metadata={"page": 2}),
+    ]
+    assert scores[0] > scores[1] > scores[2]