Composable Assertions

expect.all_of(
    expect.contains("Paris"),
    expect.not_contains("London"),
    expect.latency_under(2000),
)

expect.any_of(
    expect.contains("capital"),
    expect.contains("city"),
)

expect.custom(lambda output: len(output.content.split()) < 50)

@llm_test(
    expect.contains("Paris") & expect.not_contains("London"),
    expect.contains("capital") | expect.contains("city"),
)
def test_composable(llm):
    output = llm("What is the capital of France?", model="gpt-5-mini")
    assert output.content

expect.all_of(
    expect.is_not_empty(),
    expect.any_of(
        expect.contains("Paris"),
        expect.contains("paris"),
    ),
    expect.latency_under(3000),
)