test_model_retry_jitter_variation() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_retry.py lines 497–516

def test_model_retry_jitter_variation() -> None:
    """Test calculate_delay adds jitter to delays."""
    # Generate multiple delays and ensure they vary
    delays = [
        calculate_delay(
            0,
            backoff_factor=1.0,
            initial_delay=1.0,
            max_delay=60.0,
            jitter=True,
        )
        for _ in range(10)
    ]

    # All delays should be within ±25% of 1.0 (i.e., between 0.75 and 1.25)
    for delay in delays:
        assert 0.75 <= delay <= 1.25

    # Delays should vary (not all the same)
    assert len(set(delays)) > 1