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package ready
import (
"context"
"fmt"
"net/http"
"testing"
"github.com/coredns/coredns/plugin/erratic"
clog "github.com/coredns/coredns/plugin/pkg/log"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
func init() { clog.Discard() }
func TestReady(t *testing.T) {
rd := &ready{Addr: ":0"}
e := &erratic.Erratic{}
plugins.Append(e, "erratic")
if err := rd.onStartup(); err != nil {
t.Fatalf("Unable to startup the readiness server: %v", err)
}
defer rd.onFinalShutdown()
address := fmt.Sprintf("http://%s/ready", rd.ln.Addr().String())
response, err := http.Get(address)
if err != nil {
t.Fatalf("Unable to query %s: %v", address, err)
}
if response.StatusCode != http.StatusServiceUnavailable {
t.Errorf("Invalid status code: expecting %d, got %d", 503, response.StatusCode)
}
response.Body.Close()
// make it ready by giving erratic 3 queries.
m := new(dns.Msg)
m.SetQuestion("example.org.", dns.TypeA)
e.ServeDNS(context.TODO(), &test.ResponseWriter{}, m)
e.ServeDNS(context.TODO(), &test.ResponseWriter{}, m)
e.ServeDNS(context.TODO(), &test.ResponseWriter{}, m)
response, err = http.Get(address)
if err != nil {
t.Fatalf("Unable to query %s: %v", address, err)
}
if response.StatusCode != http.StatusOK {
t.Errorf("Invalid status code: expecting %d, got %d", 200, response.StatusCode)
}
response.Body.Close()
// make erratic not-ready by giving it more queries, this should not change the process readiness
e.ServeDNS(context.TODO(), &test.ResponseWriter{}, m)
e.ServeDNS(context.TODO(), &test.ResponseWriter{}, m)
e.ServeDNS(context.TODO(), &test.ResponseWriter{}, m)
response, err = http.Get(address)
if err != nil {
t.Fatalf("Unable to query %s: %v", address, err)
}
if response.StatusCode != http.StatusOK {
t.Errorf("Invalid status code: expecting %d, got %d", 200, response.StatusCode)
}
response.Body.Close()
}
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