[runtime] Fix Empty generic enumerator equality

[mono.git] / mcs / class / corlib / Test / System / ArrayTest.cs

diff --git a/mcs/class/corlib/Test/System/ArrayTest.cs b/mcs/class/corlib/Test/System/ArrayTest.cs
index 53df7555fdbe830cacff76a44a3158f97fefb209..36db33d6352b9ac3efc47122a7897ed4289ea21d 100644 (file)
--- a/mcs/class/corlib/Test/System/ArrayTest.cs
+++ b/mcs/class/corlib/Test/System/ArrayTest.cs
@@ -3385,6 +3385,30 @@ public class ArrayTest
                }
        }
 
+       [Test]
+       public void IEnumerator_Dispose ()
+       {
+               IEnumerable<int> e = new int[] { 1 };
+               var en = e.GetEnumerator ();
+               Assert.IsTrue (en.MoveNext (), "#1");
+               Assert.IsFalse (en.MoveNext (), "#2");
+               en.Dispose ();
+               Assert.IsFalse (en.MoveNext (), "#3");
+       }
+
+       [Test]
+       public void IEnumerator_ZeroSize ()
+       {
+               IEnumerable<int> e = Array.Empty<int> ();
+               var en = e.GetEnumerator ();
+               Assert.IsFalse (en.MoveNext (), "#1");
+
+               e = Array.Empty<int> ();
+               en = e.GetEnumerator ();
+               Assert.IsFalse (en.MoveNext (), "#2");
+       }
+
+       [Test]
        public void ICollection_IsReadOnly() {
                ICollection<string> arr = new string [10];
 
@@ -3669,6 +3693,20 @@ public class ArrayTest
                Assert.AreEqual (3, c.Counter);         
        }
 
+       [Test]
+       public void EnumeratorsEquality ()
+       {
+               int [] normalBase = new int [0];
+               IEnumerable<int> specialBase = new int [0];
+
+               var firstSpecial = specialBase.GetEnumerator ();
+               var secondSpecial = specialBase.GetEnumerator ();
+               var firstNormal = normalBase.GetEnumerator ();
+               var secondNormal = normalBase.GetEnumerator ();
+
+               Assert.IsFalse (object.ReferenceEquals (firstNormal, secondNormal));
+               Assert.IsTrue (object.ReferenceEquals (firstSpecial, secondSpecial));
+       }
 
        [Test]
        public void JaggedArrayCtor ()
@@ -3687,5 +3725,17 @@ public class ArrayTest
                        Assert.AreEqual (10, ((object[])arr [i]).Length);
                }
        }
+
+       [Test]
+       public unsafe void PointerArraysBoxing ()
+       {
+               var x = new int*[10];
+               var e = x.GetEnumerator ();
+               e.MoveNext ();
+
+               Assert.Throws<NotSupportedException> (() => { var _ = e.Current; }, "#1");
+               Assert.Throws<NotSupportedException> (() => { var _ = x.GetValue (0); }, "#2");
+               Assert.Throws<NotSupportedException> (() => { x.SetValue (0, 0); }, "#3");
+       }
 }
 }