[tests] Tweak DateTime.AddMillisecondsOutOfRangeException* tests to work on ARM ...

diff --git a/mcs/class/corlib/Test/System/DateTimeTest.cs b/mcs/class/corlib/Test/System/DateTimeTest.cs
index ebcf1df35a4db7ce1050f4fead09829fad695047..0e3076b1184f41ee557a224b7784f629e241d532 100644 (file)
--- a/mcs/class/corlib/Test/System/DateTimeTest.cs
+++ b/mcs/class/corlib/Test/System/DateTimeTest.cs
@@ -269,12 +269,18 @@ namespace MonoTests.System
                        Assert.AreEqual (13, t1.Second, "#C4");
                }
 
+               const long MaxMillis = 315537897600000;
+
                [Test]
                [ExpectedException (typeof (ArgumentOutOfRangeException))]
                public void AddMillisecondsOutOfRangeException1 ()
                {
                        DateTime t1 = new DateTime (myTicks [1]);
-                       t1.AddMilliseconds (9E100);
+                       // double to long conversion with overflow lead to "unspecified value", 
+                       // ref: https://msdn.microsoft.com/en-us/library/yht2cx7b.aspx
+                       // so we adapt the test to avoid this condition based on the real limit
+                       // see https://github.com/Microsoft/referencesource/blob/master/mscorlib/system/datetime.cs#L90
+                       t1.AddMilliseconds (MaxMillis + 1);
                }
 
                [Test]
@@ -282,7 +288,7 @@ namespace MonoTests.System
                public void AddMillisecondsOutOfRangeException2 ()
                {
                        DateTime t1 = new DateTime (myTicks [1]);
-                       t1.AddMilliseconds (-9E100);
+                       t1.AddMilliseconds (-MaxMillis-1);
                }
 
                [Test]