making all system tests which are subclasses of ObjectsImportTest more robust...

making all system tests which are subclasses of ObjectsImportTest more robust by waiting one second before finding the latest email (in case of async execution)

datastore_server/sourceTest/java/ch/ethz/sis/openbis/generic/dss/systemtest/api/v3/ObjectsImportTest.java

@@ -233,18 +233,30 @@ public class ObjectsImportTest extends AbstractFileTest
 
     protected void assertNoEmails(long timestamp)
     {
-        Email latestEmail = EmailUtil.findLatestEmail();
+        Email latestEmail = waitAndFindLatestEmail();
         assertTrue("Timestamp: " + timestamp + ", Latest email: " + latestEmail, latestEmail == null || latestEmail.timestamp < timestamp);
     }
 
     protected void assertEmail(long timestamp, String expectedEmail, String expectedSubject)
     {
-        Email latestEmail = EmailUtil.findLatestEmail();
+        Email latestEmail = waitAndFindLatestEmail();
         assertTrue("Timestamp: " + timestamp + ", Latest email: " + latestEmail, latestEmail != null && latestEmail.timestamp >= timestamp);
         assertEquals(expectedEmail, latestEmail.to);
         assertTrue(latestEmail.subject, latestEmail.subject.contains(expectedSubject));
     }
 
+    private Email waitAndFindLatestEmail()
+    {
+        try
+        {
+            Thread.sleep(1000);
+        } catch (InterruptedException e)
+        {
+            // silently ignored
+        }
+        return EmailUtil.findLatestEmail();
+    }
+
     public static class ImportFile
     {