Walkthrough

The changes update the initialization logic for the next_page_token variable in the SimpleRetriever class to ensure that a zero value is correctly recognized as a valid initial token. Additionally, a new unit test is introduced to verify that when the paginator's initial token is zero, it is properly passed through the retrieval process. No changes are made to public APIs or exported entity signatures.

Changes

Sequence Diagram(s)

sequenceDiagram
    participant Test as Unit Test
    participant Retriever as SimpleRetriever
    participant Paginator as Paginator
    participant Fetch as _fetch_next_page

    Test->>Paginator: get_initial_token() returns 0
    Test->>Retriever: read_records()
    Retriever->>Fetch: _fetch_next_page(..., next_page_token={"next_page_token": 0})
    Fetch-->>Retriever: Returns mocked HTTP response
    Retriever-->>Test: Yields records (none in this test)

Would you like to see additional tests for other falsy initial tokens, or is this coverage sufficient for your use case, wdyt?

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