avoid NPE when outsite of a job context

src/main/java/hudson/plugins/jira/JiraMailAddressResolver.java

@@ -5,7 +5,9 @@
 import hudson.model.User;
 import hudson.tasks.MailAddressResolver;
 import org.kohsuke.stapler.Stapler;
+import org.kohsuke.stapler.StaplerRequest;
 
+import java.util.List;
 import java.util.logging.Logger;
 import java.util.regex.Pattern;
 
@@ -32,9 +34,16 @@ public String findMailAddressFor(User u) {
         }
         String username = u.getId();
 
-        Job<?, ?> job = Stapler.getCurrentRequest().findAncestorObject( Job.class);
+        Job<?, ?> job = null;
 
-        for (JiraSite site : JiraSite.getJiraSites(job)) {
+        StaplerRequest req = Stapler.getCurrentRequest();
+        if(req != null) {
+            job = req.findAncestorObject(Job.class);
+        }
+
+        List<JiraSite> sites = job == null ? JiraGlobalConfiguration.get().getSites() : JiraSite.getJiraSites(job);
+
+        for (JiraSite site : sites) {
             JiraSession session = site.getSession(job);
             if (session == null) {
                 continue;

src/test/java/hudson/plugins/jira/MailResolverTest.java → src/test/java/hudson/plugins/jira/MailResolverDisabledTest.java

@@ -38,7 +38,7 @@
 /**
  * @author schristou88
  */
-public class MailResolverTest extends JenkinsRule {
+public class MailResolverDisabledTest extends JenkinsRule {
     @Rule
     public JenkinsRule r = new JenkinsRule();
 

src/test/java/hudson/plugins/jira/MailResolverWithExtensionTest.java

@@ -0,0 +1,116 @@
+/*
+ * The MIT License
+ * 
+ * Copyright (c) 2015 schristou88
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package hudson.plugins.jira;
+
+import edu.umd.cs.findbugs.annotations.NonNull;
+import hudson.model.User;
+import hudson.security.HudsonPrivateSecurityRealm;
+import jenkins.model.Jenkins;
+import jenkins.security.SecurityListener;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.jvnet.hudson.test.JenkinsRule;
+import org.jvnet.hudson.test.TestExtension;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.powermock.reflect.Whitebox;
+import org.springframework.security.core.userdetails.UserDetails;
+
+import java.net.URI;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doReturn;
+
+@RunWith(MockitoJUnitRunner.class)
+public class MailResolverWithExtensionTest extends JenkinsRule {
+    @Rule
+    public JenkinsRule r = new JenkinsRule();
+
+    @Mock
+    JiraSite site;
+    @Mock
+    JiraSession session;
+    @Mock
+    JiraRestService service;
+
+    @Before
+    public void createMocks() throws Exception {
+        Whitebox.setInternalState(site,"jiraSession", session);
+        Whitebox.setInternalState(session,"service", service);
+
+        Map<String, URI> avatars = new HashMap<>();
+        // pre check condition in Jira User constructor and do not ask me why!!
+        avatars.put("48x48", new URI("https://foo.com"));
+        com.atlassian.jira.rest.client.api.domain.User jiraUser =
+                new com.atlassian.jira.rest.client.api.domain.User(null, "foo", "bar", "foo@beer.com", true, null, avatars, null);
+
+        doReturn(session).when(site).getSession(any());
+        doReturn(jiraUser).when(service).getUser("foo");
+    }
+
+    @Test
+    public void emailResolverWithSecurityExtension() throws Exception {
+
+        HudsonPrivateSecurityRealm realm = new HudsonPrivateSecurityRealm(true);
+        realm.createAccount("foo", "pacific_ale");
+
+        r.jenkins.setSecurityRealm(realm);
+
+        JiraGlobalConfiguration.get().setSites(Collections.singletonList(site));
+
+        r.createWebClient().login("foo", "pacific_ale");
+    }
+
+    @TestExtension
+    public static class DummySecurityListener extends SecurityListener {
+        @Override
+        protected void authenticated2(@NonNull UserDetails details) {
+            check(details.getUsername());
+        }
+
+        @Override
+        protected void authenticated(@NonNull org.acegisecurity.userdetails.UserDetails details) {
+            check(details.getUsername());
+        }
+
+        private void check(String userId) {
+
+            User user = User.getById(userId, false);
+
+            JiraMailAddressResolver jiraMailAddressResolver =
+                    Jenkins.get().getExtensionList(JiraMailAddressResolver.class).get(0);
+            String email = jiraMailAddressResolver.findMailAddressFor(user);
+            assertThat(email, is("foo@beer.com"));
+
+        }
+
+    }
+}