public virtual void TestSeekTimeStampWrongKind()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
try
{
DateTime dateTime = new DateTime(0, DateTimeKind.Local);
cursor.Seek(dateTime);
Assert.Fail("Seeking with a date time with local DateTimeKind must fail");
}
catch (ArgumentException)
{
// ok
}
try
{
DateTime dateTime = new DateTime(0, DateTimeKind.Unspecified);
cursor.Seek(dateTime);
Assert.Fail("Seeking with a date time with unspecified DateTimeKind must fail");
}
catch (ArgumentException)
{
// ok
}
}
public virtual void TestSeekingMilesAfterEnd()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
InsertAllDefaultEntries();
TimeSpan fullDistance = DefaultTimeSeries.TimeInterval.EndTime -
DefaultTimeSeries.TimeInterval.StartTime;
// go into the middle of the timeseries
cursor.Seek(DefaultTimeSeries.TimeInterval.StartTime + new TimeSpan(fullDistance.Ticks / 2));
Assert.IsNotNull(cursor.Current);
// seek will always step to the last valid entry
cursor.Seek(fullDistance, SeekPosition.CURRENT);
Assert.IsNotNull(cursor.Current);
Assert.IsFalse(cursor.MoveNext());
Assert.IsNull(cursor.Current);
}
public void TestSeekTimeSpanSpecialValueAtEnd()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
InsertAllDefaultEntries();
// show that cursor works as expected for a time series with "normal" values
cursor.Seek(TimeSpan.FromTicks(-1), SeekPosition.END); // go to second last element
Assert.IsTrue(cursor.MoveNext()); // go to last element
Assert.IsNotNull(cursor.Current);
Assert.IsFalse(cursor.MoveNext());
InsertDefaultEntryByTimeStamp(MaximumTimeStamp);
// show that cursor still works
cursor.Seek(TimeSpan.FromTicks(-1), SeekPosition.END); // go to second last element
Assert.IsTrue(cursor.MoveNext()); // go to last element
Assert.IsNotNull(cursor.Current);
Assert.IsFalse(cursor.MoveNext());
}
public virtual void TestSeekTimeStamp()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
InsertAllDefaultEntries();
// seek time stamp shall return the entry with the correct time stamp
foreach (long timeStamp in DefaultTimeStamps)
{
cursor.Seek(DateTimeHelper.ToDateTime(timeStamp));
Assert.AreEqual(timeStamp, DateTimeHelper.ToLong(cursor.Current.TimeStamp));
}
// seek time stamp shall return the entry with the next smaller time stamp
foreach (long timeStamp in DefaultTimeStamps)
{
cursor.Seek(DateTimeHelper.ToDateTime(timeStamp + 1));
Assert.AreEqual(timeStamp, DateTimeHelper.ToLong(cursor.Current.TimeStamp));
}
}
public virtual void TestSeekingMilesBeforeBegin()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
InsertAllDefaultEntries();
TimeSpan fullDistance = DefaultTimeSeries.TimeInterval.EndTime -
DefaultTimeSeries.TimeInterval.StartTime;
// go into the middle of the timeseries
cursor.Seek(DefaultTimeSeries.TimeInterval.StartTime + new TimeSpan(fullDistance.Ticks / 2));
Assert.IsNotNull(cursor.Current);
// you cannot reach a valid entry far before the beginning
cursor.Seek(-fullDistance, SeekPosition.CURRENT);
Assert.IsNull(cursor.Current);
// one step must be enough to get to the first entry
Assert.IsTrue(cursor.MoveNext());
Assert.IsNotNull(cursor.Current);
}
public virtual void TestSeekTimeStampBeforeStart()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
InsertAllDefaultEntries();
Assert.IsTrue(cursor.MoveNext());
Assert.IsNotNull(cursor.Current);
// get the first timestamp
DateTime timeStamp = cursor.Current.TimeStamp;
// try to seek before the start
Assert.IsFalse(cursor.Seek(timeStamp - new TimeSpan(100)));
Assert.IsNull(cursor.Current);
}
public virtual void TestSeekTimeStampBehindEnd()
{
ITimeSeriesEntryCursor cursor = CreateCursor();
InsertAllDefaultEntries();
cursor.SetToEnd();
Assert.IsNull(cursor.Current);
Assert.IsTrue(cursor.MovePrevious());
Assert.IsNotNull(cursor.Current);
// remember the entry and get its timestamp
ITimeSeriesEntry timeSeriesEntry = cursor.Current;
DateTime timeStamp = timeSeriesEntry.TimeStamp;
// try to seek behind the end; will result in pointing to the last entry (see documentation of Seek(TimeStamp))
Assert.IsTrue(cursor.Seek(timeStamp + new TimeSpan(100)));
Assert.IsNotNull(cursor.Current);
// check that we are indeed at the last entry
Assert.IsTrue(TimeSeriesComparisons.CompareTimeSeriesEntry(timeSeriesEntry, cursor.Current));
}