Extended test.

hooks/test/test_test.go

@@ -12,6 +12,8 @@ func TestAllHooks(t *testing.T) {
 	assert := assert.New(t)
 
 	logger, hook := NewNullLogger()
+	assert.Nil(hook.LastEntry())
+	assert.Equal(0, len(hook.Entries))
 
 	logger.Error("Hello error")
 	assert.Equal(logrus.ErrorLevel, hook.LastEntry().Level)
@@ -24,6 +26,7 @@ func TestAllHooks(t *testing.T) {
 	assert.Equal(2, len(hook.Entries))
 
 	hook.Reset()
+	assert.Nil(hook.LastEntry())
 	assert.Equal(0, len(hook.Entries))
 
 	hook = NewGlobal()