public void MultipleTasksCanMakeChangesConcurrently()
{
var diffSet = new DiffSet <int>(Enumerable.Range(0, 100));
var diffPair = diffSet.GetDiff();
Assert.Equal(100, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
var tasks = new[] {
Task.Factory.StartNew(() =>
{
for (int i = 0; i < 50; i++)
{
Assert.True(diffSet.Remove(i));
}
}),
Task.Factory.StartNew(() =>
{
for (int i = 100; i < 150; i++)
{
Assert.True(diffSet.Add(i));
}
})
};
Task.WaitAll(tasks);
Assert.Equal(100, diffSet.GetSnapshot().Count);
for (int i = 50; i < 150; i++)
{
Assert.True(diffSet.Contains(i));
}
diffPair = diffSet.GetDiff();
Assert.Equal(50, diffPair.Added.Count);
Assert.Equal(50, diffPair.Removed.Count);
Assert.False(diffPair.Reset);
for (int i = 0; i < 50; i++)
{
Assert.False(diffSet.Contains(i));
Assert.False(diffPair.Added.Contains(i));
Assert.True(diffPair.Removed.Contains(i));
}
for (int i = 50; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
Assert.False(diffPair.Added.Contains(i));
Assert.False(diffPair.Removed.Contains(i));
}
for (int i = 100; i < 50; i++)
{
Assert.True(diffSet.Contains(i));
Assert.True(diffPair.Added.Contains(i));
Assert.False(diffPair.Removed.Contains(i));
}
}
public void UsingNullItemsFail()
{
Assert.Throws <ArgumentNullException>(() => new DiffSet <string>(new[] { "this", "should", "fail", null }));
var diffSet = new DiffSet <string>(new[] { "this", "should", "succeed" });
Assert.Throws <ArgumentNullException>(() => diffSet.Add(null));
Assert.Throws <ArgumentNullException>(() => diffSet.Remove(null));
Assert.Throws <ArgumentNullException>(() => diffSet.Contains(null));
}
public void AddingAndRemovingSameItemMultipleTimesShowsUpOnceInTheDiff()
{
var diffSet = new DiffSet <int>(Enumerable.Range(0, 100));
Assert.False(diffSet.Add(0)); // no-op
Assert.True(diffSet.Remove(99));
Assert.False(diffSet.Remove(99)); // no-op
Assert.Equal(99, diffSet.GetSnapshot().Count);
var diffPair = diffSet.GetDiff();
Assert.Equal(99, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 0; i < 99; i++)
{
Assert.True(diffPair.Added.Contains(i));
Assert.True(diffSet.Contains(i));
}
Assert.False(diffSet.Add(1)); // no-op
Assert.True(diffSet.Add(99));
Assert.False(diffSet.Add(99)); // no-op
Assert.False(diffSet.Remove(101)); // no-op
Assert.True(diffSet.Remove(0));
Assert.False(diffSet.Remove(0)); // no-op
Assert.Equal(99, diffSet.GetSnapshot().Count);
diffPair = diffSet.GetDiff();
Assert.Equal(1, diffPair.Added.Count);
Assert.Equal(1, diffPair.Removed.Count);
Assert.False(diffPair.Reset);
Assert.True(diffPair.Added.Contains(99));
Assert.True(diffPair.Removed.Contains(0));
for (int i = 1; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void AddingAndRemovingSameItemDoesNotShowUpInDiff()
{
var diffSet = new DiffSet <int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(98));
Assert.True(diffSet.Remove(99));
Assert.True(diffSet.Remove(100));
Assert.True(diffSet.Add(99));
Assert.True(diffSet.Add(98));
Assert.Equal(100, diffSet.GetSnapshot().Count);
var diffPair = diffSet.GetDiff();
Assert.Equal(100, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 0; i < 100; i++)
{
Assert.True(diffPair.Added.Contains(i));
Assert.True(diffSet.Contains(i));
}
Assert.True(diffSet.Add(150));
Assert.True(diffSet.Add(200));
Assert.True(diffSet.Remove(50));
Assert.True(diffSet.Remove(200));
Assert.True(diffSet.Remove(150));
Assert.True(diffSet.Add(50));
Assert.Equal(100, diffSet.GetSnapshot().Count);
diffPair = diffSet.GetDiff();
Assert.Equal(0, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.False(diffPair.Reset);
for (int i = 0; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void AddingAndRemovingSameItemDoesNotShowUpInDiff()
{
// (0-100)
var diffSet = new DiffSet <int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(98));
Assert.True(diffSet.Remove(99));
Assert.True(diffSet.Remove(100));
Assert.True(diffSet.Add(99));
Assert.True(diffSet.Add(98));
Assert.Equal(100, diffSet.GetSnapshot().Count);
// (0-100)
var changes = diffSet.DetectChanges();
Assert.False(changes);
for (int i = 0; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
Assert.True(diffSet.Add(150));
Assert.True(diffSet.Add(200));
Assert.True(diffSet.Remove(50));
Assert.True(diffSet.Remove(200));
Assert.True(diffSet.Remove(150));
Assert.True(diffSet.Add(50));
Assert.Equal(100, diffSet.GetSnapshot().Count);
changes = diffSet.DetectChanges();
Assert.False(changes);
for (int i = 0; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void AddingAndRemovingSameItemDoesNotShowUpInDiff()
{
var diffSet = new DiffSet<int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(98));
Assert.True(diffSet.Remove(99));
Assert.True(diffSet.Remove(100));
Assert.True(diffSet.Add(99));
Assert.True(diffSet.Add(98));
Assert.Equal(100, diffSet.GetSnapshot().Count);
var diffPair = diffSet.GetDiff();
Assert.Equal(100, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 0; i < 100; i++)
{
Assert.True(diffPair.Added.Contains(i));
Assert.True(diffSet.Contains(i));
}
Assert.True(diffSet.Add(150));
Assert.True(diffSet.Add(200));
Assert.True(diffSet.Remove(50));
Assert.True(diffSet.Remove(200));
Assert.True(diffSet.Remove(150));
Assert.True(diffSet.Add(50));
Assert.Equal(100, diffSet.GetSnapshot().Count);
diffPair = diffSet.GetDiff();
Assert.Equal(0, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.False(diffPair.Reset);
for (int i = 0; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void InitialValueCombineWithChangesInFirstDiff()
{
var diffSet = new DiffSet <int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(-1));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(0));
Assert.True(diffSet.Remove(-1));
Assert.Equal(100, diffSet.GetSnapshot().Count);
var changes = diffSet.DetectChanges();
var items = diffSet.GetSnapshot();
Assert.True(changes);
Assert.Equal(100, items.Count);
Assert.False(diffSet.Contains(0));
for (int i = 1; i <= 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void InitializeDiffSetWithChangingIEnumerable()
{
var diffSet = new DiffSet <int>(new NonResettingEnumerator().Ints(5));
Assert.Equal(5, diffSet.GetSnapshot().Count);
for (int i = 0; i < 5; i++)
{
Assert.True(diffSet.Contains(i));
}
var diffPair = diffSet.GetDiff();
Assert.Equal(5, diffSet.GetSnapshot().Count);
Assert.Equal(5, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 0; i < 5; i++)
{
Assert.True(diffSet.Contains(i));
Assert.True(diffPair.Added.Contains(i));
Assert.False(diffPair.Removed.Contains(i));
}
}
public void AddingAndRemovingSameItemMultipleTimesShowsUpOnceInTheDiff()
{
var diffSet = new DiffSet<int>(Enumerable.Range(0, 100));
Assert.False(diffSet.Add(0)); // no-op
Assert.True(diffSet.Remove(99));
Assert.False(diffSet.Remove(99)); // no-op
Assert.Equal(99, diffSet.GetSnapshot().Count);
var diffPair = diffSet.GetDiff();
Assert.Equal(99, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 0; i < 99; i++)
{
Assert.True(diffPair.Added.Contains(i));
Assert.True(diffSet.Contains(i));
}
Assert.False(diffSet.Add(1)); // no-op
Assert.True(diffSet.Add(99));
Assert.False(diffSet.Add(99)); // no-op
Assert.False(diffSet.Remove(101)); // no-op
Assert.True(diffSet.Remove(0));
Assert.False(diffSet.Remove(0)); // no-op
Assert.Equal(99, diffSet.GetSnapshot().Count);
diffPair = diffSet.GetDiff();
Assert.Equal(1, diffPair.Added.Count);
Assert.Equal(1, diffPair.Removed.Count);
Assert.False(diffPair.Reset);
Assert.True(diffPair.Added.Contains(99));
Assert.True(diffPair.Removed.Contains(0));
for (int i = 1; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void InitialValueCombineWithChangesInFirstDiff()
{
var diffSet = new DiffSet <int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(-1));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(0));
Assert.True(diffSet.Remove(-1));
Assert.Equal(100, diffSet.GetSnapshot().Count);
var diffPair = diffSet.GetDiff();
Assert.Equal(100, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 1; i <= 100; i++)
{
Assert.True(diffPair.Added.Contains(i));
Assert.True(diffSet.Contains(i));
}
}
public void InitialValueCombineWithChangesInFirstDiff()
{
var diffSet = new DiffSet<int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(-1));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(0));
Assert.True(diffSet.Remove(-1));
Assert.Equal(100, diffSet.GetSnapshot().Count);
var changes = diffSet.DetectChanges();
var items = diffSet.GetSnapshot();
Assert.True(changes);
Assert.Equal(100, items.Count);
Assert.False(diffSet.Contains(0));
for (int i = 1; i <= 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void AddingAndRemovingSameItemDoesNotShowUpInDiff()
{
// (0-100)
var diffSet = new DiffSet<int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(98));
Assert.True(diffSet.Remove(99));
Assert.True(diffSet.Remove(100));
Assert.True(diffSet.Add(99));
Assert.True(diffSet.Add(98));
Assert.Equal(100, diffSet.GetSnapshot().Count);
// (0-100)
var changes = diffSet.DetectChanges();
Assert.False(changes);
for (int i = 0; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
Assert.True(diffSet.Add(150));
Assert.True(diffSet.Add(200));
Assert.True(diffSet.Remove(50));
Assert.True(diffSet.Remove(200));
Assert.True(diffSet.Remove(150));
Assert.True(diffSet.Add(50));
Assert.Equal(100, diffSet.GetSnapshot().Count);
changes = diffSet.DetectChanges();
Assert.False(changes);
for (int i = 0; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
}
}
public void UsingNullItemsFail()
{
Assert.Throws<ArgumentNullException>(() => new DiffSet<string>(new[] {"this", "should", "fail", null}));
var diffSet = new DiffSet<string>(new[] {"this", "should", "succeed"});
Assert.Throws<ArgumentNullException>(() => diffSet.Add(null));
Assert.Throws<ArgumentNullException>(() => diffSet.Remove(null));
Assert.Throws<ArgumentNullException>(() => diffSet.Contains(null));
}
public void MultipleTasksCanMakeChangesConcurrently()
{
var diffSet = new DiffSet<int>(Enumerable.Range(0, 100));
var diffPair = diffSet.GetDiff();
Assert.Equal(100, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
var tasks = new[] {
Task.Factory.StartNew(() =>
{
for (int i = 0; i < 50; i++)
{
Assert.True(diffSet.Remove(i));
}
}),
Task.Factory.StartNew(() =>
{
for (int i = 100; i < 150; i++)
{
Assert.True(diffSet.Add(i));
}
})
};
Task.WaitAll(tasks);
Assert.Equal(100, diffSet.GetSnapshot().Count);
for (int i = 50; i < 150; i++)
{
Assert.True(diffSet.Contains(i));
}
diffPair = diffSet.GetDiff();
Assert.Equal(50, diffPair.Added.Count);
Assert.Equal(50, diffPair.Removed.Count);
Assert.False(diffPair.Reset);
for (int i = 0; i < 50; i++)
{
Assert.False(diffSet.Contains(i));
Assert.False(diffPair.Added.Contains(i));
Assert.True(diffPair.Removed.Contains(i));
}
for (int i = 50; i < 100; i++)
{
Assert.True(diffSet.Contains(i));
Assert.False(diffPair.Added.Contains(i));
Assert.False(diffPair.Removed.Contains(i));
}
for (int i = 100; i < 50; i++)
{
Assert.True(diffSet.Contains(i));
Assert.True(diffPair.Added.Contains(i));
Assert.False(diffPair.Removed.Contains(i));
}
}
public void InitialValueCombineWithChangesInFirstDiff()
{
var diffSet = new DiffSet<int>(Enumerable.Range(0, 100));
Assert.True(diffSet.Add(-1));
Assert.True(diffSet.Add(100));
Assert.True(diffSet.Remove(0));
Assert.True(diffSet.Remove(-1));
Assert.Equal(100, diffSet.GetSnapshot().Count);
var diffPair = diffSet.GetDiff();
Assert.Equal(100, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 1; i <= 100; i++)
{
Assert.True(diffPair.Added.Contains(i));
Assert.True(diffSet.Contains(i));
}
}
public void InitializeDiffSetWithChangingIEnumerable()
{
var diffSet = new DiffSet<int>(new NonResettingEnumerator().Ints(5));
Assert.Equal(5, diffSet.GetSnapshot().Count);
for (int i = 0; i < 5; i++ )
{
Assert.True(diffSet.Contains(i));
}
var diffPair = diffSet.GetDiff();
Assert.Equal(5, diffSet.GetSnapshot().Count);
Assert.Equal(5, diffPair.Added.Count);
Assert.Equal(0, diffPair.Removed.Count);
Assert.True(diffPair.Reset);
for (int i = 0; i < 5; i++)
{
Assert.True(diffSet.Contains(i));
Assert.True(diffPair.Added.Contains(i));
Assert.False(diffPair.Removed.Contains(i));
}
}