/// <exception cref="System.Exception"/>
public virtual void TestQuickSort()
{
QuickSort sorter = new QuickSort();
SortRandom(sorter);
SortSingleRecord(sorter);
SortSequential(sorter);
SortSorted(sorter);
SortAllEqual(sorter);
SortWritable(sorter);
// test degenerate case for median-of-three partitioning
// a_n, a_1, a_2, ..., a_{n-1}
int Dsample = 500;
int[] values = new int[Dsample];
for (int i = 0; i < Dsample; ++i)
{
values[i] = i;
}
values[0] = values[Dsample - 1] + 1;
TestIndexedSort.SampleSortable s = new TestIndexedSort.SampleSortable(values);
values = s.GetValues();
int Dss = (Dsample / 2) * (Dsample / 2);
// Worst case is (N/2)^2 comparisons, not including those effecting
// the median-of-three partitioning; impl should handle this case
TestIndexedSort.MeasuredSortable m = new TestIndexedSort.MeasuredSortable(s, Dss);
sorter.Sort(m, 0, Dsample);
System.Console.Out.WriteLine("QuickSort degen cmp/swp: " + m.GetCmp() + "/" + m.GetSwp
() + "(" + sorter.GetType().FullName + ")");
Arrays.Sort(values);
int[] check = s.GetSorted();
Assert.True(Arrays.Equals(values, check));
}
/// <exception cref="System.Exception"/>
public virtual void SortAllEqual(IndexedSorter sorter)
{
int Sample = 500;
int[] values = new int[Sample];
Arrays.Fill(values, 10);
TestIndexedSort.SampleSortable s = new TestIndexedSort.SampleSortable(values);
sorter.Sort(s, 0, Sample);
int[] check = s.GetSorted();
Assert.True(Arrays.ToString(values) + "\ndoesn't match\n" + Arrays
.ToString(check), Arrays.Equals(values, check));
// Set random min/max, re-sort.
Random r = new Random();
int min = r.Next(Sample);
int max = (min + 1 + r.Next(Sample - 2)) % Sample;
values[min] = 9;
values[max] = 11;
System.Console.Out.WriteLine("testAllEqual setting min/max at " + min + "/" + max
+ "(" + sorter.GetType().FullName + ")");
s = new TestIndexedSort.SampleSortable(values);
sorter.Sort(s, 0, Sample);
check = s.GetSorted();
Arrays.Sort(values);
Assert.True(check[0] == 9);
Assert.True(check[Sample - 1] == 11);
Assert.True(Arrays.ToString(values) + "\ndoesn't match\n" + Arrays
.ToString(check), Arrays.Equals(values, check));
}
/// <exception cref="System.Exception"/>
public virtual void SortSingleRecord(IndexedSorter sorter)
{
int Sample = 1;
TestIndexedSort.SampleSortable s = new TestIndexedSort.SampleSortable(Sample);
int[] values = s.GetValues();
sorter.Sort(s, 0, Sample);
int[] check = s.GetSorted();
Assert.True(Arrays.ToString(values) + "\ndoesn't match\n" + Arrays
.ToString(check), Arrays.Equals(values, check));
}
/// <exception cref="System.Exception"/>
public virtual void SortSequential(IndexedSorter sorter)
{
int Sample = 500;
int[] values = new int[Sample];
for (int i = 0; i < Sample; ++i)
{
values[i] = i;
}
TestIndexedSort.SampleSortable s = new TestIndexedSort.SampleSortable(values);
sorter.Sort(s, 0, Sample);
int[] check = s.GetSorted();
Assert.True(Arrays.ToString(values) + "\ndoesn't match\n" + Arrays
.ToString(check), Arrays.Equals(values, check));
}
/// <exception cref="System.Exception"/>
public virtual void SortRandom(IndexedSorter sorter)
{
int Sample = 256 * 1024;
TestIndexedSort.SampleSortable s = new TestIndexedSort.SampleSortable(Sample);
long seed = s.GetSeed();
System.Console.Out.WriteLine("sortRandom seed: " + seed + "(" + sorter.GetType().
FullName + ")");
int[] values = s.GetValues();
Arrays.Sort(values);
sorter.Sort(s, 0, Sample);
int[] check = s.GetSorted();
Assert.True("seed: " + seed + "\ndoesn't match\n", Arrays.Equals
(values, check));
}
/// <exception cref="System.Exception"/>
public virtual void SortSorted(IndexedSorter sorter)
{
int Sample = 500;
int[] values = new int[Sample];
Random r = new Random();
long seed = r.NextLong();
r.SetSeed(seed);
System.Console.Out.WriteLine("testSorted seed: " + seed + "(" + sorter.GetType().
FullName + ")");
for (int i = 0; i < Sample; ++i)
{
values[i] = r.Next(100);
}
Arrays.Sort(values);
TestIndexedSort.SampleSortable s = new TestIndexedSort.SampleSortable(values);
sorter.Sort(s, 0, Sample);
int[] check = s.GetSorted();
Assert.True(Arrays.ToString(values) + "\ndoesn't match\n" + Arrays
.ToString(check), Arrays.Equals(values, check));
}