test_model_retry_max_delay_cap() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_retry.py lines 467–494

def test_model_retry_max_delay_cap() -> None:
    """Test calculate_delay caps delay at max_delay."""
    # Test delay calculation with aggressive backoff and max_delay cap
    delay_0 = calculate_delay(
        0,
        backoff_factor=10.0,  # Very aggressive backoff
        initial_delay=1.0,
        max_delay=2.0,  # Cap at 2 seconds
        jitter=False,
    )  # 1.0
    delay_1 = calculate_delay(
        1,
        backoff_factor=10.0,
        initial_delay=1.0,
        max_delay=2.0,
        jitter=False,
    )  # 10.0 -> capped to 2.0
    delay_2 = calculate_delay(
        2,
        backoff_factor=10.0,
        initial_delay=1.0,
        max_delay=2.0,
        jitter=False,
    )  # 100.0 -> capped to 2.0

    assert delay_0 == 1.0
    assert delay_1 == 2.0
    assert delay_2 == 2.0