from panda3d.core import ShaderInput, Vec4


def test_shaderinput_vector_compare():
    i0 = ShaderInput('a', Vec4(0, 0, 0, 0))
    i1 = ShaderInput('a', Vec4(1e-9, 0, 0, 0))
    i2 = ShaderInput('a', Vec4(1e-8, 0, 0, 0))
    i3 = ShaderInput('a', Vec4(2, 0, 0, 0))

    assert i0 == i0
    assert i1 == i1
    assert i2 == i2
    assert i3 == i3

    assert i0 != i1
    assert i0 != i2
    assert i0 != i3
    assert i1 != i2
    assert i2 != i3
    assert i1 != i3

    assert not i0 < i0
    assert not i1 < i1
    assert not i2 < i2
    assert not i3 < i3

    assert i0 < i1
    assert i0 < i2
    assert i0 < i3
    assert i1 < i2
    assert i2 < i3
    assert i1 < i3