protected override async Task <Result?> Explore()
{
var distinctValuesResult = await distinctValuesProvider.ResultAsync;
if (distinctValuesResult == null)
{
return(null);
}
var config = await sampleValuesGeneratorConfigProvider.ResultAsync;
if (config == null)
{
return(null);
}
var sampleValues = Enumerable.Empty <JsonElement>();
if (config.CategoricalSampling)
{
var rand = new Random(Environment.TickCount);
var allValues = ValueWithCountList <JsonElement> .FromValueWithCountEnum(
distinctValuesResult
.DistinctRows
.Where(r => !r.IsSuppressed)
.Select(r => r.IsNull
? ValueWithCount <JsonElement> .ValueCount(JsonNull, r.Count, r.CountNoise)
: r));
sampleValues = Enumerable
.Range(0, Context.SamplesToPublish)
.Select(_ => allValues.GetRandomValue(rand));
}
return(new Result(sampleValues.ToList()));
}
public void FindValueTest(int count)
{
var vals = ValueWithCountList <int> .FromValueWithCountEnum(
Enumerable.Range(0, count).Select(i => ValueWithCount <int> .ValueCount(i, 1L)));
for (var i = 0; i < vals.Count; i++)
{
Assert.Equal(i, vals.FindValue(i));
}
Assert.Throws <ArgumentException>(() => vals.FindValue(count));
Assert.Throws <ArgumentException>(() => vals.FindValue(count + 1));
}
public void FindValueFromEmptyList()
{
var vals = ValueWithCountList <string> .FromValueWithCountEnum(Enumerable.Empty <ValueWithCount <string> >());
Assert.Throws <InvalidOperationException>(() => vals.FindValue(1));
}
