108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
|
package health
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"fmt"
|
||
|
|
"net/http"
|
||
|
|
"net/http/httptest"
|
||
|
|
"testing"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TestReturns200IfThereAreNoChecks ensures that the result code of the health
|
||
|
|
// endpoint is 200 if there are not currently registered checks.
|
||
|
|
func TestReturns200IfThereAreNoChecks(t *testing.T) {
|
||
|
|
recorder := httptest.NewRecorder()
|
||
|
|
|
||
|
|
req, err := http.NewRequest("GET", "https://fakeurl.com/debug/health", nil)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("Failed to create request.")
|
||
|
|
}
|
||
|
|
|
||
|
|
StatusHandler(recorder, req)
|
||
|
|
|
||
|
|
if recorder.Code != 200 {
|
||
|
|
t.Errorf("Did not get a 200.")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// TestReturns500IfThereAreErrorChecks ensures that the result code of the
|
||
|
|
// health endpoint is 500 if there are health checks with errors
|
||
|
|
func TestReturns503IfThereAreErrorChecks(t *testing.T) {
|
||
|
|
recorder := httptest.NewRecorder()
|
||
|
|
|
||
|
|
req, err := http.NewRequest("GET", "https://fakeurl.com/debug/health", nil)
|
||
|
|
if err != nil {
|
||
|
|
t.Errorf("Failed to create request.")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Create a manual error
|
||
|
|
Register("some_check", CheckFunc(func() error {
|
||
|
|
return errors.New("This Check did not succeed")
|
||
|
|
}))
|
||
|
|
|
||
|
|
StatusHandler(recorder, req)
|
||
|
|
|
||
|
|
if recorder.Code != 503 {
|
||
|
|
t.Errorf("Did not get a 503.")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// TestHealthHandler ensures that our handler implementation correct protects
|
||
|
|
// the web application when things aren't so healthy.
|
||
|
|
func TestHealthHandler(t *testing.T) {
|
||
|
|
// clear out existing checks.
|
||
|
|
DefaultRegistry = NewRegistry()
|
||
|
|
|
||
|
|
// protect an http server
|
||
|
|
handler := http.Handler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||
|
|
w.WriteHeader(http.StatusNoContent)
|
||
|
|
}))
|
||
|
|
|
||
|
|
// wrap it in our health handler
|
||
|
|
handler = Handler(handler)
|
||
|
|
|
||
|
|
// use this swap check status
|
||
|
|
updater := NewStatusUpdater()
|
||
|
|
Register("test_check", updater)
|
||
|
|
|
||
|
|
// now, create a test server
|
||
|
|
server := httptest.NewServer(handler)
|
||
|
|
|
||
|
|
checkUp := func(t *testing.T, message string) {
|
||
|
|
resp, err := http.Get(server.URL)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("error getting success status: %v", err)
|
||
|
|
}
|
||
|
|
defer resp.Body.Close()
|
||
|
|
|
||
|
|
if resp.StatusCode != http.StatusNoContent {
|
||
|
|
t.Fatalf("unexpected response code from server when %s: %d != %d", message, resp.StatusCode, http.StatusNoContent)
|
||
|
|
}
|
||
|
|
// NOTE(stevvooe): we really don't care about the body -- the format is
|
||
|
|
// not standardized or supported, yet.
|
||
|
|
}
|
||
|
|
|
||
|
|
checkDown := func(t *testing.T, message string) {
|
||
|
|
resp, err := http.Get(server.URL)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("error getting down status: %v", err)
|
||
|
|
}
|
||
|
|
defer resp.Body.Close()
|
||
|
|
|
||
|
|
if resp.StatusCode != http.StatusServiceUnavailable {
|
||
|
|
t.Fatalf("unexpected response code from server when %s: %d != %d", message, resp.StatusCode, http.StatusServiceUnavailable)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// server should be up
|
||
|
|
checkUp(t, "initial health check")
|
||
|
|
|
||
|
|
// now, we fail the health check
|
||
|
|
updater.Update(fmt.Errorf("the server is now out of commission"))
|
||
|
|
checkDown(t, "server should be down") // should be down
|
||
|
|
|
||
|
|
// bring server back up
|
||
|
|
updater.Update(nil)
|
||
|
|
checkUp(t, "when server is back up") // now we should be back up.
|
||
|
|
}
|