add test for resolve=LAZY (default)

src/Makefile.am

@@ -25,7 +25,8 @@ AM_VTC_LOG_FLAGS = \
 	-p vmod_path="$(abs_builddir)/.libs:$(vmoddir)"
 
 TESTS = \
-	vtc/vmod_cluster.vtc
+	vtc/vmod_cluster.vtc	\
+	vtc/lazy.vtc
 
 # Documentation
 

src/vtc/lazy.vtc

+varnishtest "vmod_cluster toy example with round-robin - lazy resolution"
+
+server s1 {
+    rxreq
+    txresp
+} -start
+
+server s2 {
+}
+
+server s3 {
+    rxreq
+    txresp
+} -start
+
+varnish v1 -vcl+backend {
+    import cluster;
+    import directors;
+
+    sub vcl_init {
+	new rr = directors.round_robin();
+	rr.add_backend(s1);
+	rr.add_backend(s2);
+	new cl = cluster.cluster(rr.backend(), deny=s2, real=s3,
+	    uncacheable_direct=false);
+    }
+    sub vcl_recv {
+	return (pass);
+    }
+    sub vcl_backend_fetch {
+	set bereq.backend = cl.backend();
+    }
+    sub vcl_backend_response {
+	set beresp.http.backend = beresp.backend;
+    }
+} -start
+
+client c1 {
+	txreq
+	rxresp
+	expect resp.status == 200
+	expect resp.http.backend == "s1"
+	txreq
+	rxresp
+	expect resp.status == 200
+	expect resp.http.backend == "s3"
+} -run