VS 2010单元测试和无符号类型
我正在将单元测试从 NUnit 转换为 VisualStudio 2010 单元测试框架。 以下 ByteToUShortTest()
方法失败并显示消息:
Assert.AreEqual 失败。 预期:
[TestMethod, CLSCompliant(false)]
public void ByteToUShortTest()
{
var array = new byte[2];
Assert.AreEqual(ByteToUShort(array), new ushort[1]);
}
测试调用的代码是:
[CLSCompliant(false)]
public static ushort[] ByteToUShort(byte[] array)
{
return ByteToUShort(array, 0, array.Length, EndianType.LittleEndian);
}
public enum EndianType
{
LittleEndian,
BigEndian
}
[CLSCompliant(false)]
public static ushort[] ByteToUShort(byte[] array, int offset, int length, EndianType endianType)
{
// argument validation
if ((length + offset) > array.Length)
throw new ArgumentException("The length and offset provided extend past the end of the array.");
if ((length % 2) != 0)
throw new ArgumentException("The number of bytes to convert must be a multiple of 2.", "length");
var temp = new ushort[length / 2];
for (int i = 0, j = offset; i < temp.Length; i++)
{
if (endianType == EndianType.LittleEndian)
{
temp[i] = (ushort)(((uint)array[j++] & 0xFF) | (((uint)array[j++] & 0xFF) << 8));
}
else
{
temp[i] = (ushort)(((uint)array[j++] & 0xFF) << 8 | ((uint)array[j++] & 0xFF));
}
}
return temp;
}
此测试已使用 NUnit 成功运行。 有什么想法为什么类型应该不同吗?
解决方案
对于单维和多维数组,以及任何ICollection,VisualStudio 2010 单元测试框架提供 CollectionAssert 类。
[TestMethod, CLSCompliant(false)]
public void ByteToUShortTest()
{
var array = new byte[2];
CollectionAssert.AreEqual(ByteToUShort(array), new ushort[1]);
}
I am converting my unit tests from NUnit to the VisualStudio 2010 unit test framework. The following ByteToUShortTest()
method fails with the message:
Assert.AreEqual failed. Expected:<System.UInt16[]>. Actual:<System.UInt16[]>.
[TestMethod, CLSCompliant(false)]
public void ByteToUShortTest()
{
var array = new byte[2];
Assert.AreEqual(ByteToUShort(array), new ushort[1]);
}
The code called by the test is:
[CLSCompliant(false)]
public static ushort[] ByteToUShort(byte[] array)
{
return ByteToUShort(array, 0, array.Length, EndianType.LittleEndian);
}
public enum EndianType
{
LittleEndian,
BigEndian
}
[CLSCompliant(false)]
public static ushort[] ByteToUShort(byte[] array, int offset, int length, EndianType endianType)
{
// argument validation
if ((length + offset) > array.Length)
throw new ArgumentException("The length and offset provided extend past the end of the array.");
if ((length % 2) != 0)
throw new ArgumentException("The number of bytes to convert must be a multiple of 2.", "length");
var temp = new ushort[length / 2];
for (int i = 0, j = offset; i < temp.Length; i++)
{
if (endianType == EndianType.LittleEndian)
{
temp[i] = (ushort)(((uint)array[j++] & 0xFF) | (((uint)array[j++] & 0xFF) << 8));
}
else
{
temp[i] = (ushort)(((uint)array[j++] & 0xFF) << 8 | ((uint)array[j++] & 0xFF));
}
}
return temp;
}
This test was running successfully with NUnit. Any ideas why the types are supposed to be different?
Solution
For single and multi-dimensional arrays, as well as for any ICollection, the VisualStudio 2010 unit test framework provides the CollectionAssert class.
[TestMethod, CLSCompliant(false)]
public void ByteToUShortTest()
{
var array = new byte[2];
CollectionAssert.AreEqual(ByteToUShort(array), new ushort[1]);
}
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不同的不是类型,而是实例。 您正在比较两个不同的数组。
It's not the types that are different, it's the instances. You're comparing two different arrays.