public void CategorySampleReadsDataCorrectly()
{
// ARRANGE
var dataList = new List <byte>();
string resourceName = "Unit.Tests.QuickPulse.PerfLib.PerfData.data";
Stream stream = null;
try
{
stream = typeof(CategorySampleTests).Assembly.GetManifestResourceStream(resourceName);
using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
{
stream = null;
dataList.AddRange(reader.ReadToEnd().Split(',').Select(byte.Parse));
}
}
finally
{
stream?.Dispose();
}
byte[] data = dataList.ToArray();
var perfLib = PerfLib.GetPerfLib();
// ACT
var categorySample = new CategorySample(data, 230, 6, perfLib);
// ASSERT
// the test data has 28 counters, 165 instances, with the first counter being index 6 (% Processor Time).
Assert.AreEqual(28, categorySample.CounterTable.Count);
Assert.AreEqual(165, categorySample.InstanceNameTable.Count);
Assert.AreEqual(6, categorySample.CounterTable.First().Key);
Assert.AreEqual("Idle", categorySample.InstanceNameTable.First().Key);
}
/// <summary>
/// Gets a collection of <see cref="QuickPulseProcess"/> objects - each corresponding to a system process and containing
/// information about the amount of time the process has occupied CPU cores.
/// </summary>
/// <param name="totalTime">If available, contains the value of the _Total instance of the counter, which indicates the overall
/// amount of time spent by CPU cores executing system processes.</param>
public IEnumerable <QuickPulseProcess> GetProcesses(out TimeSpan?totalTime)
{
// "Process" object
const int CategoryIndex = 230;
// "% Processor Time" counter
const int CounterIndex = 6;
const string TotalInstanceName = "_Total";
const string IdleInstanceName = "Idle";
CategorySample categorySample = this.perfLib.GetCategorySample(CategoryIndex, CounterIndex);
CounterDefinitionSample counterSample = categorySample.CounterTable[CounterIndex];
var procValues = new Dictionary <string, long>();
foreach (var pair in categorySample.InstanceNameTable)
{
string instanceName = pair.Key;
int valueIndex = pair.Value;
long instanceValue = counterSample.GetInstanceValue(valueIndex);
procValues.Add(instanceName, instanceValue);
}
long overallTime;
totalTime = procValues.TryGetValue(TotalInstanceName, out overallTime) ? TimeSpan.FromTicks(overallTime) : (TimeSpan?)null;
return
(procValues.Where(
pv =>
!string.Equals(pv.Key, TotalInstanceName, StringComparison.Ordinal) &&
!string.Equals(pv.Key, IdleInstanceName, StringComparison.Ordinal))
.Select(pv => new QuickPulseProcess(pv.Key, TimeSpan.FromTicks(pv.Value))));
}
