log_test.go
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package router
import (
"bytes"
"log"
"net/http"
"net/http/httptest"
"os"
"strings"
"testing"
)
func TestWithLogger_CapturesStatus(t *testing.T) {
handler := WithLogger()(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
}))
rec := httptest.NewRecorder()
req := httptest.NewRequest("GET", "/test", nil)
handler.ServeHTTP(rec, req)
if rec.Code != http.StatusNotFound {
t.Errorf("expected 404, got %d", rec.Code)
}
}
func TestWithLogger_DevFormat(t *testing.T) {
t.Setenv("ENV", "development")
var buf bytes.Buffer
log.SetOutput(&buf)
defer log.SetOutput(os.Stderr)
handler := WithLogger()(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
}))
rec := httptest.NewRecorder()
req := httptest.NewRequest("GET", "/hello", nil)
handler.ServeHTTP(rec, req)
output := buf.String()
if !strings.Contains(output, "GET") || !strings.Contains(output, "/hello") || !strings.Contains(output, "200") {
t.Errorf("dev log should contain method, path, status; got: %s", output)
}
if strings.Contains(output, `"method"`) {
t.Errorf("dev log should not be JSON; got: %s", output)
}
}
func TestWithLogger_ProductionJSON(t *testing.T) {
t.Setenv("ENV", "production")
var buf bytes.Buffer
log.SetOutput(&buf)
defer log.SetOutput(os.Stderr)
handler := WithLogger()(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusCreated)
}))
rec := httptest.NewRecorder()
req := httptest.NewRequest("POST", "/api/items", nil)
handler.ServeHTTP(rec, req)
output := buf.String()
if !strings.Contains(output, `"method":"POST"`) {
t.Errorf("production log should be JSON with method; got: %s", output)
}
if !strings.Contains(output, `"status":201`) {
t.Errorf("production log should contain status 201; got: %s", output)
}
}
func TestLogWriter_Flush(t *testing.T) {
rec := httptest.NewRecorder()
lw := &logWriter{ResponseWriter: rec, status: 200}
lw.Flush() // should not panic
}