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|
package nethttp
import (
"net/http"
"net/http/httptest"
"net/url"
"reflect"
"strings"
"testing"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/mocktracer"
)
func TestOperationNameOption(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("/root", func(w http.ResponseWriter, r *http.Request) {})
fn := func(r *http.Request) string {
return "HTTP " + r.Method + ": /root"
}
tests := []struct {
options []MWOption
opName string
}{
{nil, "HTTP GET"},
{[]MWOption{OperationNameFunc(fn)}, "HTTP GET: /root"},
}
for _, tt := range tests {
testCase := tt
t.Run(testCase.opName, func(t *testing.T) {
tr := &mocktracer.MockTracer{}
mw := Middleware(tr, mux, testCase.options...)
srv := httptest.NewServer(mw)
defer srv.Close()
_, err := http.Get(srv.URL)
if err != nil {
t.Fatalf("server returned error: %v", err)
}
spans := tr.FinishedSpans()
if got, want := len(spans), 1; got != want {
t.Fatalf("got %d spans, expected %d", got, want)
}
if got, want := spans[0].OperationName, testCase.opName; got != want {
t.Fatalf("got %s operation name, expected %s", got, want)
}
})
}
}
func TestSpanObserverOption(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("/root", func(w http.ResponseWriter, r *http.Request) {})
opNamefn := func(r *http.Request) string {
return "HTTP " + r.Method + ": /root"
}
spanObserverfn := func(sp opentracing.Span, r *http.Request) {
sp.SetTag("http.uri", r.URL.EscapedPath())
}
wantTags := map[string]interface{}{"http.uri": "/"}
tests := []struct {
options []MWOption
opName string
Tags map[string]interface{}
}{
{nil, "HTTP GET", nil},
{[]MWOption{OperationNameFunc(opNamefn)}, "HTTP GET: /root", nil},
{[]MWOption{MWSpanObserver(spanObserverfn)}, "HTTP GET", wantTags},
{[]MWOption{OperationNameFunc(opNamefn), MWSpanObserver(spanObserverfn)}, "HTTP GET: /root", wantTags},
}
for _, tt := range tests {
testCase := tt
t.Run(testCase.opName, func(t *testing.T) {
tr := &mocktracer.MockTracer{}
mw := Middleware(tr, mux, testCase.options...)
srv := httptest.NewServer(mw)
defer srv.Close()
_, err := http.Get(srv.URL)
if err != nil {
t.Fatalf("server returned error: %v", err)
}
spans := tr.FinishedSpans()
if got, want := len(spans), 1; got != want {
t.Fatalf("got %d spans, expected %d", got, want)
}
if got, want := spans[0].OperationName, testCase.opName; got != want {
t.Fatalf("got %s operation name, expected %s", got, want)
}
defaultLength := 5
if len(spans[0].Tags()) != len(testCase.Tags)+defaultLength {
t.Fatalf("got tag length %d, expected %d", len(spans[0].Tags()), len(testCase.Tags))
}
for k, v := range testCase.Tags {
if tag := spans[0].Tag(k); v != tag.(string) {
t.Fatalf("got %v tag, expected %v", tag, v)
}
}
})
}
}
func TestSpanFilterOption(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("/root", func(w http.ResponseWriter, r *http.Request) {})
spanFilterfn := func(r *http.Request) bool {
return !strings.HasPrefix(r.Header.Get("User-Agent"), "kube-probe")
}
noAgentReq, _ := http.NewRequest("GET", "/root", nil)
noAgentReq.Header.Del("User-Agent")
probeReq1, _ := http.NewRequest("GET", "/root", nil)
probeReq1.Header.Add("User-Agent", "kube-probe/1.12")
probeReq2, _ := http.NewRequest("GET", "/root", nil)
probeReq2.Header.Add("User-Agent", "kube-probe/9.99")
postmanReq, _ := http.NewRequest("GET", "/root", nil)
postmanReq.Header.Add("User-Agent", "PostmanRuntime/7.3.0")
tests := []struct {
options []MWOption
request *http.Request
opName string
ExpectToCreateSpan bool
}{
{nil, noAgentReq, "No filter", true},
{[]MWOption{MWSpanFilter(spanFilterfn)}, noAgentReq, "No User-Agent", true},
{[]MWOption{MWSpanFilter(spanFilterfn)}, probeReq1, "User-Agent: kube-probe/1.12", false},
{[]MWOption{MWSpanFilter(spanFilterfn)}, probeReq2, "User-Agent: kube-probe/9.99", false},
{[]MWOption{MWSpanFilter(spanFilterfn)}, postmanReq, "User-Agent: PostmanRuntime/7.3.0", true},
}
for _, tt := range tests {
testCase := tt
t.Run(testCase.opName, func(t *testing.T) {
tr := &mocktracer.MockTracer{}
mw := Middleware(tr, mux, testCase.options...)
srv := httptest.NewServer(mw)
defer srv.Close()
client := &http.Client{}
testCase.request.URL, _ = url.Parse(srv.URL)
_, err := client.Do(testCase.request)
if err != nil {
t.Fatalf("server returned error: %v", err)
}
spans := tr.FinishedSpans()
if spanCreated := len(spans) == 1; spanCreated != testCase.ExpectToCreateSpan {
t.Fatalf("spanCreated %t, ExpectToCreateSpan %t", spanCreated, testCase.ExpectToCreateSpan)
}
})
}
}
func TestURLTagOption(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("/root", func(w http.ResponseWriter, r *http.Request) {})
fn := func(u *url.URL) string {
// Log path only (no query parameters etc)
return u.Path
}
tests := []struct {
options []MWOption
url string
tag string
}{
{[]MWOption{}, "/root?token=123", "/root?token=123"},
{[]MWOption{MWURLTagFunc(fn)}, "/root?token=123", "/root"},
}
for _, tt := range tests {
testCase := tt
t.Run(testCase.tag, func(t *testing.T) {
tr := &mocktracer.MockTracer{}
mw := Middleware(tr, mux, testCase.options...)
srv := httptest.NewServer(mw)
defer srv.Close()
_, err := http.Get(srv.URL + testCase.url)
if err != nil {
t.Fatalf("server returned error: %v", err)
}
spans := tr.FinishedSpans()
if got, want := len(spans), 1; got != want {
t.Fatalf("got %d spans, expected %d", got, want)
}
tag := spans[0].Tags()["http.url"]
if got, want := tag, testCase.tag; got != want {
t.Fatalf("got %s tag name, expected %s", got, want)
}
})
}
}
func TestSpanErrorAndStatusCode(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("/header-and-body", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Write([]byte("OK"))
})
mux.HandleFunc("/body-only", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("OK"))
})
mux.HandleFunc("/header-only", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
})
mux.HandleFunc("/empty", func(w http.ResponseWriter, r *http.Request) {
// no status header
})
mux.HandleFunc("/error", func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(500)
})
expStatusOK := map[string]interface{}{"http.status_code": uint16(200)}
tests := []struct {
url string
tags map[string]interface{}
}{
{url: "/header-and-body", tags: expStatusOK},
{url: "/body-only", tags: expStatusOK},
{url: "/header-only", tags: expStatusOK},
{url: "/empty", tags: expStatusOK},
{url: "/error", tags: map[string]interface{}{"http.status_code": uint16(500), string(ext.Error): true}},
}
for _, tt := range tests {
testCase := tt
t.Run(testCase.url, func(t *testing.T) {
tr := &mocktracer.MockTracer{}
mw := Middleware(tr, mux)
srv := httptest.NewServer(mw)
defer srv.Close()
_, err := http.Get(srv.URL + testCase.url)
if err != nil {
t.Fatalf("server returned error: %v", err)
}
spans := tr.FinishedSpans()
if got, want := len(spans), 1; got != want {
t.Fatalf("got %d spans, expected %d", got, want)
}
for k, v := range testCase.tags {
if tag := spans[0].Tag(k); !reflect.DeepEqual(tag, v) {
t.Fatalf("tag %s: got %v, expected %v", k, tag, v)
}
}
})
}
}
func BenchmarkStatusCodeTrackingOverhead(b *testing.B) {
mux := http.NewServeMux()
mux.HandleFunc("/root", func(w http.ResponseWriter, r *http.Request) {})
tr := &mocktracer.MockTracer{}
mw := Middleware(tr, mux)
srv := httptest.NewServer(mw)
defer srv.Close()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
resp, err := http.Get(srv.URL)
if err != nil {
b.Fatalf("server returned error: %v", err)
}
err = resp.Body.Close()
if err != nil {
b.Fatalf("failed to close response: %v", err)
}
}
})
}
func TestMiddlewareHandlerPanic(t *testing.T) {
tests := []struct {
handler func(w http.ResponseWriter, r *http.Request)
status uint16
isError bool
name string
}{
{
name: "OK",
handler: func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("OK"))
},
status: 200,
isError: false,
},
{
name: "Panic",
handler: func(w http.ResponseWriter, r *http.Request) {
panic("panic test")
},
status: 0,
isError: true,
},
{
name: "InternalServerError",
handler: func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("InternalServerError"))
},
status: 500,
isError: true,
},
}
for _, testCase := range tests {
t.Run(testCase.name, func(t *testing.T) {
mux := http.NewServeMux()
mux.HandleFunc("/root", testCase.handler)
tr := &mocktracer.MockTracer{}
srv := httptest.NewServer(MiddlewareFunc(tr, mux.ServeHTTP))
defer srv.Close()
_, err := http.Get(srv.URL + "/root")
if err != nil {
t.Logf("server returned error: %v", err)
}
spans := tr.FinishedSpans()
if got, want := len(spans), 1; got != want {
t.Fatalf("got %d spans, expected %d", got, want)
}
actualStatus := spans[0].Tag(string(ext.HTTPStatusCode))
if testCase.status > 0 && !reflect.DeepEqual(testCase.status, actualStatus) {
t.Fatalf("got status code %v, expected %d", actualStatus, testCase.status)
}
actualErr, ok := spans[0].Tag(string(ext.Error)).(bool)
if !ok {
actualErr = false
}
if testCase.isError != actualErr {
t.Fatalf("got span error %v, expected %v", actualErr, testCase.isError)
}
})
}
}
|
