public void TestEnumeratorFiltersEnumeration()
{
var en = new BatchEnumerator <int, int>(
Items.AsQueryable(),
q => q,
null,
q => q < 4,
5
);
Assert.AreEqual(0, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(3, en.Current.Count());
Assert.AreEqual(new[] { 1, 2, 3 }, en.Current);
Assert.False(en.MoveNext());
}
public void TestResetResetsPage()
{
var en = new BatchEnumerator <int, int>(
Items.AsQueryable(),
q => q,
null,
null,
5
);
Assert.True(en.MoveNext());
Assert.True(en.MoveNext());
Assert.AreEqual(2, en.BatchNumber);
en.Reset();
Assert.AreEqual(0, en.BatchNumber);
}
public void TestEnumeratorFetchesCorrectBatchItemsInReverseOrder()
{
var en = new BatchEnumerator <int, int>(
Items.AsQueryable(),
q => q,
qq => qq.OrderByDescending(q => q),
null,
5
);
Assert.AreEqual(0, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 21, 20, 19, 18, 17 }, en.Current);
Assert.AreEqual(1, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 16, 15, 14, 13, 12 }, en.Current);
Assert.AreEqual(2, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 11, 10, 9, 8, 7 }, en.Current);
Assert.AreEqual(3, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 6, 5, 4, 3, 2 }, en.Current);
Assert.AreEqual(4, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 1 }, en.Current);
Assert.AreEqual(5, en.BatchNumber);
Assert.False(en.MoveNext());
}
public void TestEnumeratorFetchesCorrectBatchItems()
{
var en = new BatchEnumerator <int, int>(
Items.AsQueryable(),
q => q,
null,
null,
5
);
Assert.AreEqual(0, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 1, 2, 3, 4, 5 }, en.Current);
Assert.AreEqual(1, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 6, 7, 8, 9, 10 }, en.Current);
Assert.AreEqual(2, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 11, 12, 13, 14, 15 }, en.Current);
Assert.AreEqual(3, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 16, 17, 18, 19, 20 }, en.Current);
Assert.AreEqual(4, en.BatchNumber);
Assert.True(en.MoveNext());
Assert.AreEqual(new[] { 21 }, en.Current);
Assert.AreEqual(5, en.BatchNumber);
Assert.False(en.MoveNext());
}
public void TestSetPaddingInsideIterationThrowsException()
{
Assert.Throws <ArgumentException>(() => {
var en = new BatchEnumerator <int, int>(
Items.AsQueryable(),
q => q,
null,
null,
5
);
en.MoveNext();
en.Padding = 6;
});
}
public void TestSetPaddingWithNoIterationAfterReset()
{
var en = new BatchEnumerator <int, int>(
Items.AsQueryable(),
q => q,
null,
null,
5
);
en.MoveNext();
en.Reset();
en.Padding = 6;
Assert.AreEqual(6, en.Padding);
}