[require]
GLSL >= 1.10

[vertex shader]

varying vec4 c;
uniform bool b;

void good(void)
{
    c = vec4(0, 1, 0, 1);
}

void bad(void)
{
    c = vec4(1, 0, 0, 1);
}

void main()
{
    b ? good() : bad();
}

[fragment shader]

varying vec4 c;
uniform bool b;

void good(void)
{
    gl_FragColor = c;
}

void bad(void)
{
    gl_FragColor = c + vec4(0, 0, 1, 0);
}

void main()
{
    b ? good() : bad();
}

[test]
uniform int b 1

draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 0.0