Add a default logger.

- Having the default logger set to nil was troublesome because some errors
  are hard to detect without a logger. This falls under "sane default"
  changes and so should be made.

auth/auth_test.go

@@ -3,6 +3,7 @@ package auth
 import (
 	"errors"
 	"html/template"
+	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"strings"
@@ -16,6 +17,7 @@ func testSetup() (a *Auth, s *mocks.MockStorer) {
 	s = mocks.NewMockStorer()
 
 	authboss.Cfg = authboss.NewConfig()
+	authboss.Cfg.LogWriter = ioutil.Discard
 	authboss.Cfg.Layout = template.Must(template.New("").Parse(`{{template "authboss" .}}`))
 	authboss.Cfg.Storer = s
 	authboss.Cfg.XSRFName = "xsrf"

authboss_test.go

@@ -3,6 +3,7 @@ package authboss
 import (
 	"database/sql"
 	"errors"
+	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -11,6 +12,7 @@ import (
 
 func TestMain(main *testing.M) {
 	RegisterModule("testmodule", testMod)
+	Cfg.LogWriter = ioutil.Discard
 	Init()
 	code := main.Run()
 	os.Exit(code)
@@ -18,6 +20,7 @@ func TestMain(main *testing.M) {
 
 func TestAuthBossInit(t *testing.T) {
 	Cfg = NewConfig()
+	Cfg.LogWriter = ioutil.Discard
 	err := Init()
 	if err != nil {
 		t.Error("Unexpected error:", err)
@@ -26,6 +29,7 @@ func TestAuthBossInit(t *testing.T) {
 
 func TestAuthBossCurrentUser(t *testing.T) {
 	Cfg = NewConfig()
+	Cfg.LogWriter = ioutil.Discard
 	Cfg.Storer = mockStorer{"joe": Attributes{"email": "john@john.com", "password": "lies"}}
 	Cfg.SessionStoreMaker = func(_ http.ResponseWriter, _ *http.Request) ClientStorer {
 		return mockClientStore{SessionKey: "joe"}

config.go

@@ -170,7 +170,7 @@ func NewConfig() *Config {
 		LockWindow:   5 * time.Minute,
 		LockDuration: 5 * time.Hour,
 
-		LogWriter: ioutil.Discard,
+		LogWriter: NewDefaultLogger(),
 		Callbacks: NewCallbacks(),
 		Mailer:    LogMailer(ioutil.Discard),
 	}

logger.go

@@ -0,0 +1,20 @@
+package authboss
+
+import (
+	"log"
+	"os"
+)
+
+// DefaultLogger is a basic logger.
+type DefaultLogger log.Logger
+
+// NewDefaultLogger creates a logger to stdout.
+func NewDefaultLogger() *DefaultLogger {
+	return ((*DefaultLogger)(log.New(os.Stdout, "", log.LstdFlags)))
+}
+
+// Write writes to the internal logger.
+func (d *DefaultLogger) Write(b []byte) (int, error) {
+	((*log.Logger)(d)).Printf("%s", b)
+	return len(b), nil
+}

logger_test.go

@@ -0,0 +1,25 @@
+package authboss
+
+import (
+	"bytes"
+	"io"
+	"log"
+	"strings"
+	"testing"
+)
+
+func TestDefaultLogger(t *testing.T) {
+	logger := NewDefaultLogger()
+	if logger == nil {
+		t.Error("Logger was not created.")
+	}
+}
+
+func TestDefaultLoggerOutput(t *testing.T) {
+	buffer := &bytes.Buffer{}
+	logger := (*DefaultLogger)(log.New(buffer, "", log.LstdFlags))
+	io.WriteString(logger, "hello world")
+	if s := buffer.String(); !strings.HasSuffix(s, "hello world\n") {
+		t.Error("Output was wrong:", s)
+	}
+}

mailer_test.go

@@ -2,16 +2,18 @@ package authboss
 
 import (
 	"bytes"
+	"io/ioutil"
 	"strings"
 	"testing"
 )
 
 func TestMailer(t *testing.T) {
-	NewConfig()
+	Cfg = NewConfig()
 	mailServer := &bytes.Buffer{}
 
 	Cfg.Mailer = LogMailer(mailServer)
 	Cfg.Storer = mockStorer{}
+	Cfg.LogWriter = ioutil.Discard
 	Init()
 
 	err := SendMail(Email{

router.go

@@ -19,7 +19,7 @@ func NewRouter() http.Handler {
 
 	for name, mod := range modules {
 		for route, handler := range mod.Routes() {
-			fmt.Fprintf(Cfg.LogWriter, "%-10s Register Route: %s\n", "["+name+"]", path.Join(Cfg.MountPath, route))
+			fmt.Fprintf(Cfg.LogWriter, "%-10s Route: %s\n", "["+name+"]", path.Join(Cfg.MountPath, route))
 			mux.Handle(path.Join(Cfg.MountPath, route), contextRoute{handler})
 		}
 	}