[pixel shader]
// Test empty constant buffer.
cbuffer Constants : register(b1)
{
};

float4 foo;

float4 main() : sv_target
{
    return foo;
}

[test]
uniform 0 float4 1.0 2.0 3.0 4.0
draw quad
probe all rgba (1.0, 2.0, 3.0, 4.0)