varnishtest "return deliver in vcl_hit (using keep)"

server s1 {
    rxreq
    txresp -hdr "Cache-Control: s-maxage=2" -hdr "Last-Modified: Tue, 03 Apr 2018 21:35:51 +0200" -hdr "X-Resp-ID: 1"

    rxreq
    txresp -hdr "Cache-Control: s-maxage=2" -hdr "Last-Modified: Tue, 03 Apr 2018 21:35:51 +0200" -hdr "X-Resp-ID: 2"
} -start

varnish v1 -vcl+backend {
    sub vcl_backend_response {
        set beresp.grace = 0s;
        set beresp.keep = 5s;
    }

    sub vcl_hit {
        return(deliver);
    }
} -start

# First request, cache miss
client c1 {
    txreq
    rxresp
    expect resp.http.X-Resp-ID == 1
} -run

varnish v1 -expect cache_hit == 0
varnish v1 -expect cache_miss == 1

# Second request, cache hit
client c2 {
    txreq
    rxresp
    expect resp.http.X-Resp-ID == 1
} -run

varnish v1 -expect cache_hit == 1
varnish v1 -expect cache_miss == 1

# Third request waiting 3s to make the 2s ttl expire. This will result in a
# bgfetch and the stale object being returned. Still considered a cache hit.
client c3 {
    delay 3
    txreq
    rxresp
    expect resp.http.X-Resp-ID == 1
} -run

varnish v1 -expect cache_hit == 2
varnish v1 -expect cache_miss == 1

# Fourth request. This one returns the second object and is considered
# a cache hit as well.
client c4 {
    txreq
    rxresp
    expect resp.http.X-Resp-ID == 2
} -run

varnish v1 -expect cache_hit == 3
varnish v1 -expect cache_miss == 1

varnish v1 -expect n_expired == 0