import rawcpu


def test_vendor_not_empty():
    assert len(rawcpu.vendor()) > 0


def test_brand_not_empty():
    assert len(rawcpu.brand()) > 0


def test_rdtsc_moves_forward():
    a = rawcpu.rdtsc()
    b = rawcpu.rdtsc()
    assert b >= a


def test_cpuid_leaf_zero_reports_max_leaf():
    eax, _ebx, _ecx, _edx = rawcpu.cpuid(0)
    assert eax >= 1


def test_has_feature_sse2_true_on_any_modern_x86():
    assert rawcpu.has_feature("sse2") is True


def test_has_feature_unknown_raises():
    try:
        rawcpu.has_feature("not-a-real-feature")
        assert False, "expected ValueError"
    except ValueError:
        pass