Add test for UpstreamHost defaults

middleware/proxy/upstream.go

@@ -67,38 +67,8 @@ func NewStaticUpstreams(c parse.Dispenser) ([]Upstream, error) {
 
 		upstream.Hosts = make([]*UpstreamHost, len(to))
 		for i, host := range to {
-			if !strings.HasPrefix(host, "http") &&
+			uh, err := upstream.NewHost(host)
-				!strings.HasPrefix(host, "unix:") {
+			if err != nil {
-				host = "http://" + host
-			}
-			uh := &UpstreamHost{
-				Name:         host,
-				Conns:        0,
-				Fails:        0,
-				FailTimeout:  upstream.FailTimeout,
-				Unhealthy:    false,
-				ExtraHeaders: upstream.proxyHeaders,
-				CheckDown: func(upstream *staticUpstream) UpstreamHostDownFunc {
-					return func(uh *UpstreamHost) bool {
-						if uh.Unhealthy {
-							return true
-						}
-						if uh.Fails >= upstream.MaxFails &&
-							upstream.MaxFails != 0 {
-							return true
-						}
-						return false
-					}
-				}(upstream),
-				WithoutPathPrefix: upstream.WithoutPathPrefix,
-				MaxConns:          upstream.MaxConns,
-			}
-			if baseURL, err := url.Parse(uh.Name); err == nil {
-				uh.ReverseProxy = NewSingleHostReverseProxy(baseURL, uh.WithoutPathPrefix)
-				if upstream.insecureSkipVerify {
-					uh.ReverseProxy.Transport = InsecureTransport
-				}
-			} else {
 				return upstreams, err
 			}
 			upstream.Hosts[i] = uh
@@ -121,6 +91,46 @@ func (u *staticUpstream) From() string {
 	return u.from
 }
 
+func (u *staticUpstream) NewHost(host string) (*UpstreamHost, error) {
+	if !strings.HasPrefix(host, "http") &&
+		!strings.HasPrefix(host, "unix:") {
+		host = "http://" + host
+	}
+	uh := &UpstreamHost{
+		Name:         host,
+		Conns:        0,
+		Fails:        0,
+		FailTimeout:  u.FailTimeout,
+		Unhealthy:    false,
+		ExtraHeaders: u.proxyHeaders,
+		CheckDown: func(u *staticUpstream) UpstreamHostDownFunc {
+			return func(uh *UpstreamHost) bool {
+				if uh.Unhealthy {
+					return true
+				}
+				if uh.Fails >= u.MaxFails &&
+					u.MaxFails != 0 {
+					return true
+				}
+				return false
+			}
+		}(u),
+		WithoutPathPrefix: u.WithoutPathPrefix,
+		MaxConns:          u.MaxConns,
+	}
+
+	baseURL, err := url.Parse(uh.Name)
+	if err != nil {
+		return nil, err
+	}
+
+	uh.ReverseProxy = NewSingleHostReverseProxy(baseURL, uh.WithoutPathPrefix)
+	if u.insecureSkipVerify {
+		uh.ReverseProxy.Transport = InsecureTransport
+	}
+	return uh, nil
+}
+
 func parseBlock(c *parse.Dispenser, u *staticUpstream) error {
 	switch c.Val() {
 	case "policy":

middleware/proxy/upstream_test.go

@@ -5,6 +5,45 @@ import (
 	"time"
 )
 
+func TestNewHost(t *testing.T) {
+	upstream := &staticUpstream{
+		FailTimeout: 10 * time.Second,
+		MaxConns:    1,
+		MaxFails:    1,
+	}
+
+	uh, err := upstream.NewHost("example.com")
+	if err != nil {
+		t.Error("Expected no error")
+	}
+	if uh.Name != "http://example.com" {
+		t.Error("Expected default schema to be added to Name.")
+	}
+	if uh.FailTimeout != upstream.FailTimeout {
+		t.Error("Expected default FailTimeout to be set.")
+	}
+	if uh.MaxConns != upstream.MaxConns {
+		t.Error("Expected default MaxConns to be set.")
+	}
+	if uh.CheckDown == nil {
+		t.Error("Expected default CheckDown to be set.")
+	}
+	if uh.CheckDown(uh) {
+		t.Error("Expected new host not to be down.")
+	}
+	// mark Unhealthy
+	uh.Unhealthy = true
+	if !uh.CheckDown(uh) {
+		t.Error("Expected unhealthy host to be down.")
+	}
+	// mark with Fails
+	uh.Unhealthy = false
+	uh.Fails = 1
+	if !uh.CheckDown(uh) {
+		t.Error("Expected failed host to be down.")
+	}
+}
+
 func TestHealthCheck(t *testing.T) {
 	upstream := &staticUpstream{
 		from:        "",