public void GivenRegisterSnapshotCalledMultipleTimesWhenQueryExecutedThenShouldCallAllCallbacks()
{
var query = new QuerySnapshotHost <IdType>(Query);
var firstCallback = false;
var secondCallback = false;
query.RegisterSnap(e => firstCallback = true);
query.RegisterSnap(e => secondCallback = true);
var _ = query.Skip(2).Take(3).ToList();
Assert.True(firstCallback && secondCallback);
}
public void GivenNullWhenRegisterSnapshotCalledThenShouldThrowArgumentNull()
{
var query = new QuerySnapshotHost <IdType>(Query);
Assert.Throws <System.ArgumentNullException>(
() => query.RegisterSnap(null));
}
public void GivenRegisterSnapshotCalledWhenQueryExecutedTwiceThenShouldCallbackTwice()
{
var query = new QuerySnapshotHost <IdType>(Query);
int callCount = 0;
query.RegisterSnap(e => callCount++);
var _ = query.Skip(2).Take(3).ToList();
var __ = query.Skip(3).Take(2).ToList();
Assert.Equal(2, callCount);
}
public void GivenRegisterSnapshotCalledWhenUnregisterCalledThenShouldStopCallingBack()
{
var query = new QuerySnapshotHost <IdType>(Query);
int callCount = 0;
var key = query.RegisterSnap(e => callCount++);
var _ = query.Skip(2).Take(3).ToList();
query.UnregisterSnap(key);
var __ = query.Skip(3).Take(2).ToList();
Assert.Equal(1, callCount);
}
public void GivenRegisterSnapshotCalledWhenQueryExecutedThenShouldCallbackOnce()
{
var query = new QuerySnapshotHost <IdType>(Query);
Expression target = null;
query.RegisterSnap(e => target = e);
var _ = query.Skip(2).Take(3).ToList();
Assert.NotNull(target);
Assert.True(target.AsEnumerable()
.MethodsWithNameForType(typeof(Queryable), nameof(Enumerable.Take))
.Any());
}
public void GivenRegisterSnapshotCalledWhenQueryExecutedWithProjectionThenShouldCallbackOnce()
{
var query = new QuerySnapshotHost <IdType>(Query);
Expression target = null;
void CaptureSnap(Expression e)
{
target = e;
}
query.RegisterSnap(CaptureSnap);
var _ = query.Skip(2).Take(3).Select(i => new { i.Id, i.IdVal }).ToList();
Assert.NotNull(target);
Assert.True(target.AsEnumerable()
.MethodsWithNameForType(typeof(Queryable), nameof(Enumerable.Take))
.Any());
}
