Add tests

Author: rameel

Ramstack.Structures.Tests/Collections/ArrayViewTests.cs

@@ -1,3 +1,4 @@
+using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
 
@@ -417,9 +418,15 @@ public void IndexOf()
     public void AsView(string? value)
     {
         var list = value?.ToCharArray();
+        var immutable = value.AsSpan().ToImmutableArray();
+
         Assert.That(
             list.AsView(),
             Is.EquivalentTo(value.AsSpan().ToArray()));
+
+        Assert.That(
+            immutable.AsView(),
+            Is.EquivalentTo(value.AsSpan().ToArray()));
     }
 
     [TestCase(null, 0)]
@@ -432,10 +439,15 @@ public void AsView(string? value)
     public void AsView_Index(string? value, int index)
     {
         var list = value?.ToCharArray();
+        var immutable = value.AsSpan().ToImmutableArray();
 
         Assert.That(
             list.AsView(index),
             Is.EquivalentTo(value.AsSpan(index).ToArray()));
+
+        Assert.That(
+            immutable.AsView(index),
+            Is.EquivalentTo(value.AsSpan(index).ToArray()));
     }
 
     [TestCase(null, 0, 0)]
@@ -449,10 +461,15 @@ public void AsView_Index(string? value, int index)
     public void AsView_Range(string? value, int index, int length)
     {
         var list = value?.ToCharArray();
+        var immutable = value.AsSpan().ToImmutableArray();
 
         Assert.That(
             list.AsView(index, length),
             Is.EquivalentTo(value.AsSpan(index, length).ToArray()));
+
+        Assert.That(
+            immutable.AsView(index, length),
+            Is.EquivalentTo(value.AsSpan(index, length).ToArray()));
     }
 
     [TestCase(null, 1)]
@@ -462,10 +479,15 @@ public void AsView_Range(string? value, int index, int length)
     public void AsView_InvalidIndex_ShouldThrow(string? value, int index)
     {
         var list = value?.ToCharArray();
+        var immutable = value.AsSpan().ToImmutableArray();
 
         Assert.That(
             () => list.AsView(index),
             Throws.TypeOf<ArgumentOutOfRangeException>());
+
+        Assert.That(
+            () => immutable.AsView(index),
+            Throws.TypeOf<ArgumentOutOfRangeException>());
     }
 
     [TestCase(null, 1, 0)]
@@ -479,9 +501,14 @@ public void AsView_InvalidIndex_ShouldThrow(string? value, int index)
     public void AsView_InvalidRange_ShouldThrow(string? value, int index, int length)
     {
         var list = value?.ToCharArray();
+        var immutable = value.AsSpan().ToImmutableArray();
 
         Assert.That(
             () => list.AsView(index, length),
             Throws.TypeOf<ArgumentOutOfRangeException>());
+
+        Assert.That(
+            () => immutable.AsView(index, length),
+            Throws.TypeOf<ArgumentOutOfRangeException>());
     }
 }