public unsafe void CtorSpanOverByteArrayValidCasesWithPropertiesAndBasicOperationsChecks(byte[] arrayManaged)
{
fixed(byte *pinnedArray = arrayManaged)
{
byte *array = pinnedArray;
// new byte[0] is internally null
if (array == null && arrayManaged.Length == 0)
{
array = (byte *)123;
}
ByteSpan span = new ByteSpan(array, arrayManaged.Length);
Assert.Equal(arrayManaged.Length, span.Length);
Assert.NotSame(arrayManaged, span.CreateArray());
Assert.True(span.ReferenceEquals(span));
Assert.True(span.Equals(span));
Assert.True(span.Equals((object)span));
Assert.Equal(span.GetHashCode(), span.GetHashCode());
Assert.False(span.Equals(arrayManaged));
ByteSpan.Enumerator it = span.GetEnumerator();
for (int i = 0; i < span.Length; i++)
{
Assert.True(it.MoveNext());
Assert.Equal(array[i], it.Current);
Assert.Equal(array[i], span.Slice(i)[0]);
array[i] = unchecked ((byte)(array[i] + 1));
Assert.Equal(array[i], it.Current);
Assert.Equal(array[i], span.Slice(i)[0]);
var slice = span.Slice(i);
slice[0] = (unchecked ((byte)(array[i] + 1)));
Assert.Equal(array[i], it.Current);
Assert.Equal(array[i], span.Slice(i)[0]);
}
Assert.False(it.MoveNext());
it.Reset();
for (int i = 0; i < span.Length; i++)
{
Assert.True(it.MoveNext());
Assert.Equal(array[i], it.Current);
}
Assert.False(it.MoveNext());
{
ByteSpan sameSpan = new ByteSpan(array, arrayManaged.Length);
Assert.Equal(span.GetHashCode(), sameSpan.GetHashCode());
Assert.True(span.ReferenceEquals(sameSpan));
Assert.True(span.Equals(sameSpan));
Assert.True(span.Equals((object)sameSpan));
}
{
ByteSpan structCopy = span;
Assert.Equal(span.GetHashCode(), structCopy.GetHashCode());
Assert.True(span.ReferenceEquals(structCopy));
Assert.True(span.Equals(structCopy));
Assert.True(span.Equals((object)structCopy));
}
{
byte[] differentArrayManaged = new byte[arrayManaged.Length * 2];
for (int i = 0; i < arrayManaged.Length; i++)
{
differentArrayManaged[i] = unchecked ((byte)(array[i] + 1));
differentArrayManaged[arrayManaged.Length + i] = array[i];
}
fixed(byte *differentArray = differentArrayManaged)
{
{
ByteSpan equivalentSpan = new ByteSpan(differentArray + arrayManaged.Length, arrayManaged.Length);
Assert.Equal(span.GetHashCode(), equivalentSpan.GetHashCode());
Assert.False(span.ReferenceEquals(equivalentSpan));
Assert.True(span.Equals(equivalentSpan));
Assert.True(span.Equals((object)equivalentSpan));
if (equivalentSpan.Length > 0)
{
ByteSpan similarSpan = equivalentSpan.Slice(0, equivalentSpan.Length - 1);
Assert.False(span.ReferenceEquals(similarSpan));
Assert.False(span.Equals(similarSpan));
Assert.False(span.Equals((object)similarSpan));
}
}
{
ByteSpan differentSpan = new ByteSpan(differentArray, arrayManaged.Length);
Assert.False(span.ReferenceEquals(differentSpan));
// This can be simplified although it is harder to understand after simplification
if (arrayManaged.Length == 0)
{
Assert.True(span.Equals(differentSpan));
Assert.True(span.Equals((object)differentSpan));
}
else
{
Assert.False(span.Equals(differentSpan));
Assert.False(span.Equals((object)differentSpan));
}
}
}
}
}
}