uniform half4 testInputs;
uniform half4 colorGreen, colorRed, colorWhite;

half4 main(float2 coords) {
    half4 expectedA = half4(0.75, 0.0, 0.75, 0.25);
    half4 expectedB = half4(0.25, 0.0, 0.75, 1.0);
    const half4 constVal   = half4(-1.25, 0, 0.75, 2.25);
    const half4 constRamp  = half4(0.5, 0.75, 1, 1.25);
    return (mod(testInputs.x,    1)               == expectedA.x     &&
            mod(testInputs.xy,   1)               == expectedA.xy    &&
            mod(testInputs.xyz,  1)               == expectedA.xyz   &&
            mod(testInputs.xyzw, 1)               == expectedA.xyzw  &&
            mod(constVal.x,      1)               == expectedA.x     &&
            mod(constVal.xy,     1)               == expectedA.xy    &&
            mod(constVal.xyz,    1)               == expectedA.xyz   &&
            mod(constVal.xyzw,   1)               == expectedA.xyzw  &&
            mod(testInputs.x,    colorWhite.x)    == expectedA.x     &&
            mod(testInputs.xy,   colorWhite.xy)   == expectedA.xy    &&
            mod(testInputs.xyz,  colorWhite.xyz)  == expectedA.xyz   &&
            mod(testInputs.xyzw, colorWhite.xyzw) == expectedA.xyzw  &&
            mod(constVal.x,      constRamp.x)     == expectedB.x     &&
            mod(constVal.xy,     constRamp.xy)    == expectedB.xy    &&
            mod(constVal.xyz,    constRamp.xyz)   == expectedB.xyz   &&
            mod(constVal.xyzw,   constRamp.xyzw)  == expectedB.xyzw) ? colorGreen : colorRed;
}