Merge branch 'stable-2.12'

* stable-2.12:
  Update commons-validator to 1.5.1 and add test for validating TLDs

Change-Id: Icdb4cf317daa6e346ef06dfa769121fd5e69d810

gerrit-server/src/test/java/com/google/gerrit/server/mail/ValidatorTest.java

@@ -0,0 +1,61 @@
+// Copyright (C) 2016 The Android Open Source Project
+//
+// 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 com.google.gerrit.server.mail;
+
+import static com.google.common.truth.Truth.assert_;
+
+import org.apache.commons.validator.routines.EmailValidator;
+import org.junit.Test;
+
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+public class ValidatorTest {
+  private static final String UNSUPPORTED_PREFIX = "#! ";
+
+  @Test
+  public void validateTopLevelDomains() throws Exception {
+    try (InputStream in =
+        this.getClass().getResourceAsStream("tlds-alpha-by-domain.txt")) {
+      if (in == null) {
+        throw new Exception("TLD list not found");
+      }
+      BufferedReader r = new BufferedReader(new InputStreamReader(in));
+      String tld;
+      EmailValidator validator = EmailValidator.getInstance();
+      while ((tld = r.readLine()) != null) {
+        if (tld.startsWith("# ") || tld.startsWith("XN--")) {
+          // Ignore comments and non-latin domains
+          continue;
+        }
+        if (tld.startsWith(UNSUPPORTED_PREFIX)) {
+          String test = "test@example."
+              + tld.toLowerCase().substring(UNSUPPORTED_PREFIX.length());
+          assert_()
+            .withFailureMessage("expected invalid TLD \"" + test + "\"")
+            .that(validator.isValid(test))
+            .isFalse();
+        } else {
+          String test = "test@example." + tld.toLowerCase();
+          assert_()
+            .withFailureMessage("failed to validate TLD \"" + test + "\"")
+            .that(validator.isValid(test))
+            .isTrue();
+        }
+      }
+    }
+  }
+}