[JENKINS-29340] Some comments have been added to pollingWithEnvInject…

… test

src/test/java/hudson/scm/SubversionEnvInjectTest.java

@@ -6,6 +6,7 @@
 import org.jenkinsci.plugins.envinject.EnvInjectJobPropertyInfo;
 import org.junit.Rule;
 import org.junit.Test;
+import org.jvnet.hudson.test.Issue;
 import org.jvnet.hudson.test.JenkinsRule;
 
 import static org.junit.Assert.assertTrue;
@@ -17,6 +18,10 @@ public class SubversionEnvInjectTest {
     @Rule
     public JenkinsRule jenkins = new JenkinsRule();
 
+    /**
+     * This test aims to verify that the variables defined in the "Properties Content" field, are availables in SCM Polling.
+     */
+    @Issue("JENKINS-29340")
     @Test
     public void pollingWithEnvInject() throws Exception {
         FreeStyleProject project = jenkins.createFreeStyleProject();
@@ -31,6 +36,7 @@ public void pollingWithEnvInject() throws Exception {
 
         TaskListener listener = jenkins.createTaskListener();
         PollingResult poll = project.poll(listener);
+        // If true means that parameters have been replaced correctly and we have a valid repository URL.
         assertTrue(poll.hasChanges());
 
         jenkins.assertBuildStatusSuccess(project.scheduleBuild2(0).get());