uniform half4 testInputs;
uniform half4 colorGreen, colorRed;

half4 main() {
    half4 expected = half4(-2, 0, 0, 2);
    return (floor(testInputs.x)    == expected.x     &&
            floor(testInputs.xy)   == expected.xy    &&
            floor(testInputs.xyz)  == expected.xyz   &&
            floor(testInputs.xyzw) == expected.xyzw) ? colorGreen : colorRed;
}