vtest "predictive vary"

barrier b1 cond 2
barrier b2 cond 2

server s1 {
	rxreq
	txresp -hdr "Vary: foo" -bodylen 1
	rxreq
	barrier b2 sync
	barrier b1 sync
	txresp -hdr "Vary: foo" -bodylen 2
} -start

server s2 {
	rxreq
	txresp -hdr "Vary: foo" -bodylen 3
} -start

vinyl v1 -vcl+backend {
	sub vcl_backend_fetch {
		if (bereq.http.bar) {
			set bereq.backend = s2;
		}
	}
} -start

client c1 {
	txreq -hdr "Foo: vary1"
	rxresp
	expect resp.bodylen == 1
	txreq -hdr "Foo: vary2"
	rxresp
	expect resp.bodylen == 2
} -start

client c2 {
	barrier b2 sync
	txreq -hdr "Foo: vary3" -hdr "bar: yes"
	rxresp
	barrier b1 sync
	expect resp.bodylen == 3
} -start

client c1 -wait
client c2 -wait
