Move SendEmailUtils to the /ui/server directory

SendEmailUtils is a general utility of the web console, and not specifically "only"
to the Registrar console.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=226187094

javatests/google/registry/ui/server/SendEmailUtilsTest.java

@@ -0,0 +1,153 @@
+// Copyright 2017 The Nomulus Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package google.registry.ui.server;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.google.common.collect.ImmutableList;
+import google.registry.util.SendEmailService;
+import java.util.Properties;
+import javax.mail.Message;
+import javax.mail.Message.RecipientType;
+import javax.mail.MessagingException;
+import javax.mail.Session;
+import javax.mail.internet.InternetAddress;
+import javax.mail.internet.MimeMessage;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link SendEmailUtils}. */
+@RunWith(JUnit4.class)
+public class SendEmailUtilsTest {
+
+  private final SendEmailService emailService = mock(SendEmailService.class);
+
+  private Message message;
+  private SendEmailUtils sendEmailUtils;
+
+  @Before
+  public void init() {
+    message = new MimeMessage(Session.getDefaultInstance(new Properties(), null));
+    when(emailService.createMessage()).thenReturn(message);
+  }
+
+  private void setRecepients(ImmutableList<String> recepients) {
+    sendEmailUtils =
+        new SendEmailUtils(
+            "outgoing@registry.example",
+            "outgoing display name",
+            recepients,
+            emailService);
+  }
+
+  @Test
+  public void testSuccess_sendToOneAddress() throws Exception {
+    setRecepients(ImmutableList.of("johnny@fakesite.tld"));
+    assertThat(sendEmailUtils.hasRecepients()).isTrue();
+    assertThat(
+            sendEmailUtils.sendEmail(
+                "Welcome to the Internet",
+                "It is a dark and scary place."))
+        .isTrue();
+    verifyMessageSent();
+    assertThat(message.getRecipients(RecipientType.TO)).asList()
+        .containsExactly(new InternetAddress("johnny@fakesite.tld"));
+    assertThat(message.getAllRecipients()).asList()
+        .containsExactly(new InternetAddress("johnny@fakesite.tld"));
+  }
+
+  @Test
+  public void testSuccess_sendToMultipleAddresses() throws Exception {
+    setRecepients(ImmutableList.of("foo@example.com", "bar@example.com"));
+    assertThat(sendEmailUtils.hasRecepients()).isTrue();
+    assertThat(
+            sendEmailUtils.sendEmail(
+                "Welcome to the Internet",
+                "It is a dark and scary place."))
+        .isTrue();
+    verifyMessageSent();
+    assertThat(message.getAllRecipients()).asList().containsExactly(
+        new InternetAddress("foo@example.com"),
+        new InternetAddress("bar@example.com"));
+  }
+
+  @Test
+  public void testSuccess_ignoresMalformedEmailAddress() throws Exception {
+    setRecepients(ImmutableList.of("foo@example.com", "1iñvalidemail"));
+    assertThat(sendEmailUtils.hasRecepients()).isTrue();
+    assertThat(
+            sendEmailUtils.sendEmail(
+                "Welcome to the Internet",
+                "It is a dark and scary place."))
+        .isTrue();
+    verifyMessageSent();
+    assertThat(message.getAllRecipients()).asList()
+        .containsExactly(new InternetAddress("foo@example.com"));
+  }
+
+  @Test
+  public void testFailure_noAddresses() throws Exception {
+    setRecepients(ImmutableList.of());
+    assertThat(sendEmailUtils.hasRecepients()).isFalse();
+    assertThat(
+            sendEmailUtils.sendEmail(
+                "Welcome to the Internet",
+                "It is a dark and scary place."))
+        .isFalse();
+    verify(emailService, never()).sendMessage(any(Message.class));
+  }
+
+  @Test
+  public void testFailure_onlyGivenMalformedAddress() throws Exception {
+    setRecepients(ImmutableList.of("1iñvalidemail"));
+    assertThat(sendEmailUtils.hasRecepients()).isTrue();
+    assertThat(
+            sendEmailUtils.sendEmail(
+                "Welcome to the Internet",
+                "It is a dark and scary place."))
+        .isFalse();
+    verify(emailService, never()).sendMessage(any(Message.class));
+  }
+
+  @Test
+  public void testFailure_exceptionThrownDuringSend() throws Exception {
+    setRecepients(ImmutableList.of("foo@example.com"));
+    assertThat(sendEmailUtils.hasRecepients()).isTrue();
+    doThrow(new MessagingException()).when(emailService).sendMessage(any(Message.class));
+    assertThat(
+            sendEmailUtils.sendEmail(
+                "Welcome to the Internet",
+                "It is a dark and scary place."))
+        .isFalse();
+    verifyMessageSent();
+    assertThat(message.getAllRecipients())
+        .asList()
+        .containsExactly(new InternetAddress("foo@example.com"));
+  }
+
+  private void verifyMessageSent() throws Exception {
+    verify(emailService).sendMessage(message);
+    assertThat(message.getSubject()).isEqualTo("Welcome to the Internet");
+    assertThat(message.getContent()).isEqualTo("It is a dark and scary place.");
+  }
+}