Output timezone when test failed

Author: alex-kulakov

Orm/Xtensive.Orm.Tests.Sql/PostgreSql/PostgreSqlHelperTest.cs

@@ -101,15 +101,15 @@ public void PseudoPosixOffsetRecognitionTest(string offset)
     public void ResolvableTimeZonesTest()
     {
       foreach (var tz in timezoneIdsWithWinAnalogue) {
-        Assert.That(PostgreSqlHelper.GetTimeZoneInfoForServerTimeZone(tz), Is.Not.Null);
+        Assert.That(PostgreSqlHelper.GetTimeZoneInfoForServerTimeZone(tz), Is.Not.Null, tz);
       }
     }
 
     [Test]
     public void UnresolvableTimeZonesTest()
     {
       foreach(var tz in timezoneIdsWithoutWinAnalogue) {
-        Assert.That(PostgreSqlHelper.GetTimeZoneInfoForServerTimeZone(tz), Is.Null);
+        Assert.That(PostgreSqlHelper.GetTimeZoneInfoForServerTimeZone(tz), Is.Null, tz);
       }
     }