[require]
shader model >= 5.0

[pixel shader fail]
RWTexture2D<float4> u;

float4 main() : sv_target
{
    /* All four components must be written in a single statement. */
    u[uint2(0, 0)].xy = float4(1, 2);
    u[uint2(0, 0)].zw = float4(3, 4);
    return 0;
}

[pixel shader fail]
Texture2D<float4> u;

float4 main() : sv_target
{
    /* SRVs are not writable. */
    u[uint2(0, 0)].xyzw = float4(1, 2, 3, 4);
    return 0;
}

[uav 1]
format r32 float
size (2, 2)

0.1 0.2
0.3 0.4

[uav 2]
size (1, 1)

0.5 0.6 0.7 0.8

[pixel shader]
RWTexture2D<float> u;
RWTexture2D<float4> v;

float4 main() : sv_target
{
    u[uint2(0, 0)] = 0.5;
    u[uint2(0, 1)].x = 0.6;
    u[uint2(1, 1)] = 0.7;
    v[uint2(0, 0)].yxwz = float4(1, 2, 3, 4);
    return 0;
}

[test]
todo draw quad
probe uav 1 (0, 0) r (0.5)
probe uav 1 (0, 1) r (0.6)
probe uav 1 (1, 0) r (0.2)
probe uav 1 (1, 1) r (0.7)
probe uav 2 (0, 0) rgba (2.0, 1.0, 4.0, 3.0)