Update 3rd party license information

third-party/github.com/letsencrypt/boulder/mocks/mailer.go

@@ -0,0 +1,60 @@
+package mocks
+
+import (
+	"sync"
+
+	"github.com/letsencrypt/boulder/mail"
+)
+
+// Mailer is a mock
+type Mailer struct {
+	sync.Mutex
+	Messages []MailerMessage
+}
+
+var _ mail.Mailer = &Mailer{}
+
+// mockMailerConn is a mock that satisfies the mail.Conn interface
+type mockMailerConn struct {
+	parent *Mailer
+}
+
+var _ mail.Conn = &mockMailerConn{}
+
+// MailerMessage holds the captured emails from SendMail()
+type MailerMessage struct {
+	To      string
+	Subject string
+	Body    string
+}
+
+// Clear removes any previously recorded messages
+func (m *Mailer) Clear() {
+	m.Lock()
+	defer m.Unlock()
+	m.Messages = nil
+}
+
+// SendMail is a mock
+func (m *mockMailerConn) SendMail(to []string, subject, msg string) error {
+	m.parent.Lock()
+	defer m.parent.Unlock()
+	for _, rcpt := range to {
+		m.parent.Messages = append(m.parent.Messages, MailerMessage{
+			To:      rcpt,
+			Subject: subject,
+			Body:    msg,
+		})
+	}
+	return nil
+}
+
+// Close is a mock
+func (m *mockMailerConn) Close() error {
+	return nil
+}
+
+// Connect is a mock
+func (m *Mailer) Connect() (mail.Conn, error) {
+	return &mockMailerConn{parent: m}, nil
+}