public void ReverseBitsTest_Zero()
{
int number = 0;
int expected = 0;
int actual;
Fft_Accessor fft = new Fft_Accessor();
actual = fft.ReverseBits(number, 32);
Assert.AreEqual(expected, actual);
}
public void ReverseBitsInvalidCallTest()
{
int number = 5; // 0 ... 0101
int expected = 10; // 1010 ... 0
int actual;
Fft_Accessor fft = new Fft_Accessor();
actual = fft.ReverseBits(number, 4);
Assert.AreEqual(expected, actual);
}
public void ReverseBitsTest()
{
int number = 5; // 0 ... 0101
int expected = (1 << 31) | (1 << 29); // 1010 ... 0
int actual;
Fft_Accessor fft = new Fft_Accessor();
actual = fft.ReverseBits(number, 32);
Assert.AreEqual(expected, actual);
}
public void PermuteWithBitReversalTest()
{
var data = new[] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
var expResult = new[] {0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15};
var fft = new Fft_Accessor();
fft.PermuteWithBitReversal(data);
for (int i = 0; i < data.Length; i++)
{
Assert.AreEqual(data[i], expResult[i], "Failure at index " + i);
}
}
