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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
// This file is copied and adapted from the following git repository -
// https://github.com/dotnet/corefx
// Commit ID: bdd0814360d4c3a58860919f292a306242f27da1
// Path: /src/System.Numerics.Tensors/tests/TensorTestsBase.cs
// Original license statement below -
// Licensed to the .NET Foundation under one or more agreements.
// 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.Collections.Generic;
using System;
namespace Microsoft.ML.OnnxRuntime.Tensors.Tests
{
public class TensorTestsBase
{
public enum TensorType
{
Dense
};
public class TensorConstructor
{
public TensorType TensorType { get; set; }
public bool IsReversedStride { get; set; }
public Tensor<T> CreateFromArray<T>(Array array)
{
switch (TensorType)
{
case TensorType.Dense:
return array.ToTensor<T>(IsReversedStride);
}
throw new ArgumentException(nameof(TensorType));
}
public Tensor<T> CreateFromDimensions<T>(ReadOnlySpan<int> dimensions)
{
switch (TensorType)
{
case TensorType.Dense:
return new DenseTensor<T>(dimensions, IsReversedStride);
}
throw new ArgumentException(nameof(TensorType));
}
public override string ToString()
{
return $"{TensorType}, {nameof(IsReversedStride)} = {IsReversedStride}";
}
}
private static TensorType[] s_tensorTypes = new[]
{
TensorType.Dense
};
private static bool[] s_reverseStrideValues = new[]
{
false,
true
};
public static IEnumerable<object[]> GetSingleTensorConstructors()
{
foreach (TensorType tensorType in s_tensorTypes)
{
foreach (bool isReversedStride in s_reverseStrideValues)
{
yield return new[]
{
new TensorConstructor()
{
TensorType = tensorType,
IsReversedStride = isReversedStride
}
};
}
}
}
public static IEnumerable<object[]> GetDualTensorConstructors()
{
foreach (TensorType leftTensorType in s_tensorTypes)
{
foreach (TensorType rightTensorType in s_tensorTypes)
{
foreach (bool isLeftReversedStride in s_reverseStrideValues)
{
foreach (bool isRightReversedStride in s_reverseStrideValues)
{
yield return new[]
{
new TensorConstructor()
{
TensorType = leftTensorType,
IsReversedStride = isLeftReversedStride
},
new TensorConstructor()
{
TensorType = rightTensorType,
IsReversedStride = isRightReversedStride
}
};
}
}
}
}
}
public static IEnumerable<object[]> GetTensorAndResultConstructor()
{
foreach (TensorType leftTensorType in s_tensorTypes)
{
foreach (TensorType rightTensorType in s_tensorTypes)
{
foreach (bool isReversedStride in s_reverseStrideValues)
{
yield return new[]
{
new TensorConstructor()
{
TensorType = leftTensorType,
IsReversedStride = isReversedStride
},
new TensorConstructor()
{
TensorType = rightTensorType,
IsReversedStride = isReversedStride
}
};
}
}
}
}
public static NativeMemory<T> NativeMemoryFromArray<T>(T[] array)
{
return NativeMemoryFromArray<T>((Array)array);
}
public static NativeMemory<T> NativeMemoryFromArray<T>(Array array)
{
// this silly method takes a managed array and copies it over to unmanaged memory,
// **only for test purposes**
var memory = NativeMemory<T>.Allocate(array.Length);
var span = memory.GetSpan();
int index = 0;
foreach (T item in array)
{
span[index++] = item;
}
return memory;
}
}
}
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