go-micro.dev/v5@v5.12.0/util/http/http_test.go (about)

     1  package http
     2  
     3  import (
     4  	"io"
     5  	"net"
     6  	"net/http"
     7  	"testing"
     8  
     9  	"go-micro.dev/v5/registry"
    10  )
    11  
    12  func TestRoundTripper(t *testing.T) {
    13  	m := registry.NewMemoryRegistry()
    14  
    15  	rt := NewRoundTripper(
    16  		WithRegistry(m),
    17  	)
    18  
    19  	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    20  		w.Write([]byte(`hello world`))
    21  	})
    22  
    23  	l, err := net.Listen("tcp", "127.0.0.1:0")
    24  	if err != nil {
    25  		t.Fatal(err)
    26  	}
    27  	defer l.Close()
    28  
    29  	go http.Serve(l, nil)
    30  
    31  	m.Register(&registry.Service{
    32  		Name: "example.com",
    33  		Nodes: []*registry.Node{
    34  			{
    35  				Id:      "1",
    36  				Address: l.Addr().String(),
    37  			},
    38  		},
    39  	})
    40  
    41  	req, err := http.NewRequest("GET", "http://example.com", nil)
    42  	if err != nil {
    43  		t.Fatal(err)
    44  	}
    45  
    46  	w, err := rt.RoundTrip(req)
    47  	if err != nil {
    48  		t.Fatal(err)
    49  	}
    50  
    51  	b, err := io.ReadAll(w.Body)
    52  	if err != nil {
    53  		t.Fatal(err)
    54  	}
    55  	w.Body.Close()
    56  
    57  	if string(b) != "hello world" {
    58  		t.Fatal("response is", string(b))
    59  	}
    60  
    61  	// test http request
    62  	c := &http.Client{
    63  		Transport: rt,
    64  	}
    65  
    66  	rsp, err := c.Get("http://example.com")
    67  	if err != nil {
    68  		t.Fatal(err)
    69  	}
    70  
    71  	b, err = io.ReadAll(rsp.Body)
    72  	if err != nil {
    73  		t.Fatal(err)
    74  	}
    75  	rsp.Body.Close()
    76  
    77  	if string(b) != "hello world" {
    78  		t.Fatal("response is", string(b))
    79  	}
    80  }