Added tests for invalid allocation sizes

Author: Sergio0694

UnitTests/UnitTests.HighPerformance.Shared/Buffers/Test_ArrayPoolBufferWriter{T}.cs

@@ -54,6 +54,16 @@ public void Test_ArrayPoolBufferWriterOfT_AllocateAndGetMemoryAndSpan()
             Assert.ThrowsException<ObjectDisposedException>(() => writer.Advance(1));
         }
 
+        [TestCategory("ArrayPoolBufferWriterOfT")]
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentOutOfRangeException))]
+        public void Test_ArrayPoolBufferWriterOfT_InvalidRequestedSize()
+        {
+            var writer = new ArrayPoolBufferWriter<byte>(-1);
+
+            Assert.Fail("You shouldn't be here");
+        }
+
         [TestCategory("ArrayPoolBufferWriterOfT")]
         [TestMethod]
         public void Test_ArrayPoolBufferWriterOfT_Clear()

UnitTests/UnitTests.HighPerformance.Shared/Buffers/Test_MemoryOwner{T}.cs

@@ -30,6 +30,16 @@ public void Test_MemoryOwnerOfT_AllocateAndGetMemoryAndSpan()
             Assert.IsTrue(buffer.Span.ToArray().All(i => i == 42));
         }
 
+        [TestCategory("MemoryOwnerOfT")]
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentOutOfRangeException))]
+        public void Test_MemoryOwnerOfT_InvalidRequestedSize()
+        {
+            using var buffer = MemoryOwner<int>.Allocate(-1);
+
+            Assert.Fail("You shouldn't be here");
+        }
+
         [TestCategory("MemoryOwnerOfT")]
         [TestMethod]
         [ExpectedException(typeof(ObjectDisposedException))]

UnitTests/UnitTests.HighPerformance.Shared/Buffers/Test_SpanOwner{T}.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using Microsoft.Toolkit.HighPerformance.Buffers;
@@ -27,6 +28,16 @@ public void Test_SpanOwnerOfT_AllocateAndGetMemoryAndSpan()
             Assert.IsTrue(buffer.Span.ToArray().All(i => i == 42));
         }
 
+        [TestCategory("SpanOwnerOfT")]
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentOutOfRangeException))]
+        public void Test_SpanOwnerOfT_InvalidRequestedSize()
+        {
+            using var buffer = SpanOwner<int>.Allocate(-1);
+
+            Assert.Fail("You shouldn't be here");
+        }
+
         [TestCategory("HashCodeOfT")]
         [TestMethod]
         public void Test_SpanOwnerOfT_PooledBuffersAndClear()