fix(historian): #671 review — raw-row cap, reverse Interpolative, SDK status rule, Partial bit

M1: the time-weighted family (incl. Total, formerly a pushed-down SUM) streams
raw window rows into the C# evaluator. New shared knob
ServerHistorian:MaxTimeWeightedRawRows (default 1,000,000; <=0 unbounded with a
Validate warning) flows through HistorianBackendRegistry into both providers.
The window query is capped at cap+1 (SQL Server TOP (@maxRows), QuestDB LIMIT $4);
one row past the cap throws the new Core.Abstractions
HistoryReadLimitExceededException, which the node manager maps to
BadTooManyOperations for that node. Not counted as a backend health failure;
bound rows are not counted; per-sample aggregates are not capped.

M2: reverse Interpolative is anchored at the later time (Part 13): points at
End - i*interval, emitted latest first. 10:00->09:00 @1h yields 10:00.

L1: Partial bit (0x4, = Opc.Ua.AggregateBits.Partial) on non-Bad results of a
truncated last interval (time-weighted family; per-sample family is a follow-up).

L2/L3: aligned with the SDK AggregateCalculator.GetTimeBasedStatusCode
(decompiled from Opc.Ua.Server 1.5.378.106): TreatUncertainAsBad=false counts
Uncertain time (Uncertain samples, held-into-outage, extrapolation) as Good
time; data but no non-Bad time => generic Bad (0x80000000); BadNoData only
when there is no data at all. Consequence: a live tag's latest interval reads
Good (documented).

L5: release note no longer claims Total matches the Gateway Integral exactly
(AVEVA's divisor is unverified); it notes Total is now evaluated in C# and
subject to the cap.

Tests: unit (reverse Interpolative x3, Partial, Bad vs BadNoData incl. an
open-ended outage, cap helpers, SDK bit oracles); conformance (reverse
Interpolative, raw-row cap at/over/0, bounds not counted, health unaffected);
node manager BadTooManyOperations; options default + warning. Each new
behaviour falsified by mutation (aggregator x9, data-source cap checks on
both backends against the real DBs, node-manager catch).
This commit is contained in:
Joseph Doherty
2026-10-11 09:10:26 -04:00
parent 1f88669304
commit 56bb4855bb
24 changed files with 460 additions and 86 deletions
@@ -22,6 +22,10 @@ public interface IConformanceBackend : IAsyncDisposable
/// <param name="clock">Its "now"; null means the system clock.</param>
IHistorianDataSource CreateDataSource(TimeProvider? clock = null);
/// <summary>A fresh data source whose time-weighted raw-row cap (<c>ServerHistorian:MaxTimeWeightedRawRows</c>) is <paramref name="maxTimeWeightedRawRows"/>.</summary>
/// <param name="maxTimeWeightedRawRows">The cap (&lt;= 0 = unbounded).</param>
IHistorianDataSource CreateDataSource(int maxTimeWeightedRawRows);
/// <summary>A fresh live-value writer over this backend's store.</summary>
/// <param name="utcNow">The clock used to stamp values that carry no timestamp; null means the system clock.</param>
IHistorianValueWriter CreateValueWriter(Func<DateTime>? utcNow = null);
@@ -346,6 +346,7 @@ public abstract class ProcessedConformance : ConformanceBase
private const uint GoodInterp = 0x00000402u; // Good | InfoType 0x400 | Interpolated 0x2
private const uint UncertainInterp = 0x40A40402u; // UncertainDataSubNormal | 0x402
private const uint NoData = 0x809B0000u;
private const uint BadCalc = 0x80000401u; // generic Bad | Calculated (an all-outage interval)
/// <summary>
/// Sparse tag W: −30 = 0 G (bound before the window), +20 = 40 G, +30 = outage marker, +50 = 20 G, +100 = 20 G
@@ -405,12 +406,13 @@ public abstract class ProcessedConformance : ConformanceBase
public async Task TimeAverage2_over_a_sparse_tag_with_narrow_intervals()
{
await SeedWAsync();
// 10 s intervals (narrower than the gaps): [0,10) 24→32 = 28 G; [10,20) 32→40 = 36 G; [20,30) 40 held, Uncertain;
// [30,40) and [40,50) inside the outage ⇒ BadNoData; [50,60) … [70,80) the flat 20 up to the bound after, Good.
// 10 s intervals (narrower than the gaps): [0,10) 24→32 = 28; [10,20) 32→40 = 36; [20,30) 40 held up to the
// outage (Uncertain time, which counts as Good: TreatUncertainAsBad = false); [30,40) and [40,50) inside the outage
// ⇒ generic Bad (data, but none non-Bad); [50,60) … [70,80) the flat 20 up to the bound after, Good.
var s = await ReadW(HistoryAggregateType.TimeAverage2, 10);
Values(s, 28, 36, 40, null, null, 20, 20, 20);
s.Select(x => x.StatusCode).ShouldBe(
[GoodCalc, GoodCalc, UncertainCalc, NoDataCalc, NoDataCalc, GoodCalc, GoodCalc, GoodCalc]);
[GoodCalc, GoodCalc, GoodCalc, BadCalc, BadCalc, GoodCalc, GoodCalc, GoodCalc]);
// Total2 of the first interval: 28 × 10 s.
((double)(await ReadW(HistoryAggregateType.Total2, 10))[0].Value!).ShouldBe(280d, 1e-9);
}
@@ -427,6 +429,43 @@ public abstract class ProcessedConformance : ConformanceBase
[GoodInterp, GoodInterp, GoodRaw, UncertainInterp, UncertainInterp, GoodRaw, GoodInterp, GoodInterp]);
}
[Fact]
public async Task A_reverse_Interpolative_read_is_anchored_at_its_later_time()
{
await SeedWAsync();
// At(80) → At(0), 40 s: points At(80) (on the Good 20→20 segment to the bound at +100 ⇒ 20) and At(40) (inside
// the outage ⇒ bridged 80/3, Uncertain), latest first. A forward read would answer At(0) and At(40) instead.
var s = (await B.CreateDataSource().ReadProcessedAsync("W", At(80), At(0), TimeSpan.FromSeconds(40),
HistoryAggregateType.Interpolative, Ct)).Samples;
s.Select(x => x.SourceTimestampUtc).ShouldBe([B.Round(At(80)), B.Round(At(40))]);
Values(s, 20, 80d / 3d);
s.Select(x => x.StatusCode).ShouldBe([GoodInterp, UncertainInterp]);
}
[Fact]
public async Task The_time_weighted_raw_row_cap_fails_the_read_past_the_cap_only()
{
// Tag A holds five samples in [0,80); W holds three in [0,80) plus two bound rows outside it.
await ConformanceData.SeedAAsync(B);
await SeedWAsync();
var atCap = B.CreateDataSource(5);
(await atCap.ReadProcessedAsync("A", At(0), At(80), Twenty, HistoryAggregateType.Total, Ct)).Samples.Count.ShouldBe(4);
var under = B.CreateDataSource(4);
var ex = await Should.ThrowAsync<HistoryReadLimitExceededException>(
() => under.ReadProcessedAsync("A", At(0), At(80), Twenty, HistoryAggregateType.Total, Ct));
ex.Limit.ShouldBe(4);
// Pushed-down (per-sample) aggregates are not capped; the bound rows outside the window do not count.
(await under.ReadProcessedAsync("A", At(0), At(80), Twenty, HistoryAggregateType.Average, Ct)).Samples.Count.ShouldBe(4);
(await B.CreateDataSource(3).ReadProcessedAsync("W", At(0), At(80), Twenty, HistoryAggregateType.TimeAverage, Ct))
.Samples.Count.ShouldBe(4);
// A client-request limit, not a backend fault.
under.GetHealthSnapshot().TotalFailures.ShouldBe(0);
// Non-positive = unbounded.
(await B.CreateDataSource(0).ReadProcessedAsync("A", At(0), At(80), Twenty, HistoryAggregateType.Total, Ct))
.Samples.Count.ShouldBe(4);
}
[Fact]
public async Task Outages_straddling_both_window_edges_use_the_four_bound_seeks()
{
@@ -75,6 +75,10 @@ internal sealed class QuestDbConformanceBackend : IConformanceBackend
public IHistorianDataSource CreateDataSource(TimeProvider? clock = null) =>
new QuestDbHistorianDataSource(Conn, Boot, NewCatalog(), timeProvider: clock);
/// <inheritdoc/>
public IHistorianDataSource CreateDataSource(int maxTimeWeightedRawRows) =>
new QuestDbHistorianDataSource(Conn, Boot, NewCatalog(), maxTimeWeightedRawRows: maxTimeWeightedRawRows);
/// <inheritdoc/>
/// <remarks>The T4 live-value writer over a fresh catalog (fresh positive cache) and this instance's WAL wait.</remarks>
public IHistorianValueWriter CreateValueWriter(Func<DateTime>? utcNow = null) =>
@@ -39,6 +39,14 @@ public sealed class StatusCodeOracleTests
HistorianInfoBits.WithCalculated(interpolatedGood).ShouldBe(0x400u | HistorianInfoBits.HistorianCalculated);
}
[Fact]
public void Partial_bit_matches_the_SDK() =>
((uint)Opc.Ua.AggregateBits.Partial).ShouldBe(HistorianInfoBits.HistorianPartial);
[Fact]
public void Generic_bad_matches_the_SDK() =>
HistorianStatusCodes.Bad.ShouldBe(Opc.Ua.StatusCodes.Bad);
[Fact]
public void Info_type_is_data_value() =>
HistorianInfoBits.InfoTypeDataValue.ShouldBe(0x400u);
@@ -15,6 +15,8 @@ public sealed class TimeWeightedAggregatorTests
private const uint GoodRaw = 0x00000000u;
private const uint NoData = 0x809B0000u;
private const uint InvalidInputs = 0x80D60000u;
private const uint BadCalc = 0x80000401u; // generic Bad | Calculated (an all-outage interval)
private const uint GoodCalcPartial = 0x00000405u; // Good | Calculated | Partial (truncated last interval)
private static IReadOnlyList<DataValueSnapshot> Run(HistoryAggregateType agg, double from, double to, double intervalS,
params StoredSample[] samples) =>
@@ -38,10 +40,12 @@ public sealed class TimeWeightedAggregatorTests
[Fact]
public void TimeAverage_bridges_the_outage_on_tag_A()
{
// B0 (150+250)/20 = 20; B1 (350+450)/20 = 40; B2, B3 = 50. Only B1's [30,40) and B0's [0,10) are Good ⇒ all Uncertain.
// B0 (150+250)/20 = 20; B1 (350+450)/20 = 40; B2, B3 = 50. Status (SDK rule, Uncertain time counts as Good):
// B0 is non-Bad throughout (held-into-outage time is Uncertain) ⇒ Good; B1 has the Bad [20,30) ⇒ Uncertain;
// B2, B3 are extrapolated (Uncertain) throughout ⇒ Good.
var s = Run(HistoryAggregateType.TimeAverage, 0, 80, 20, A);
Values(s, 20, 40, 50, 50);
s.Select(x => x.StatusCode).ShouldBe([UncertainCalc, UncertainCalc, UncertainCalc, UncertainCalc]);
s.Select(x => x.StatusCode).ShouldBe([GoodCalc, UncertainCalc, GoodCalc, GoodCalc]);
s.Select(x => x.SourceTimestampUtc).ShouldBe([At(0), At(20), At(40), At(60)]);
}
@@ -58,7 +62,7 @@ public sealed class TimeWeightedAggregatorTests
// B0 350/20 = 17.5; B1 450/10 = 45 (the Bad [20,30) excluded); B2, B3 = 50.
var s = Run(HistoryAggregateType.TimeAverage2, 0, 80, 20, A);
Values(s, 17.5, 45, 50, 50);
s.Select(x => x.StatusCode).ShouldBe([UncertainCalc, UncertainCalc, UncertainCalc, UncertainCalc]);
s.Select(x => x.StatusCode).ShouldBe([GoodCalc, UncertainCalc, GoodCalc, GoodCalc]);
}
[Fact]
@@ -140,13 +144,14 @@ public sealed class TimeWeightedAggregatorTests
}
[Fact]
public void Past_the_last_sample_the_value_is_extrapolated_stepped_and_uncertain()
public void Past_the_last_sample_the_value_is_extrapolated_stepped()
{
// -5 = 7 and nothing later: held at 7 over [0,10).
// -5 = 7 and nothing later: held at 7 over [0,10). The extrapolated time is Uncertain, which the SDK rule
// (TreatUncertainAsBad = false) counts as Good time ⇒ the interval is Good; the Interpolative point is Uncertain.
StoredSample[] one = [S(-5, HistorianValue.FromDouble(7), Good)];
var s = Run(HistoryAggregateType.TimeAverage2, 0, 10, 0, one).Single();
((double)s.Value!).ShouldBe(7d);
s.StatusCode.ShouldBe(UncertainCalc);
s.StatusCode.ShouldBe(GoodCalc);
var i = Run(HistoryAggregateType.Interpolative, 0, 10, 0, one).Single();
((double)i.Value!).ShouldBe(7d);
i.StatusCode.ShouldBe(UncertainInterpolated);
@@ -203,11 +208,15 @@ public sealed class TimeWeightedAggregatorTests
}
[Fact]
public void An_interval_entirely_inside_an_outage_is_BadNoData_but_Interpolative_bridges_it()
public void An_interval_entirely_inside_an_outage_is_Bad_but_Interpolative_bridges_it()
{
// Window [10,15): raw is Bad throughout ⇒ no non-Bad time ⇒ BadNoData. Interpolative at +10 = 10 + 20·(10/15).
Run(HistoryAggregateType.TimeAverage, 10, 15, 0, Outage).Single().StatusCode.ShouldBe(NoDataCalc);
Run(HistoryAggregateType.TimeAverage2, 10, 15, 0, Outage).Single().StatusCode.ShouldBe(NoDataCalc);
// Window [10,15): raw is Bad throughout ⇒ data but no non-Bad time ⇒ generic Bad (the SDK rule; BadNoData is
// reserved for no data at all). Interpolative at +10 = 10 + 20·(10/15).
var ta = Run(HistoryAggregateType.TimeAverage, 10, 15, 0, Outage).Single();
ta.StatusCode.ShouldBe(BadCalc);
ta.Value.ShouldBeNull();
Run(HistoryAggregateType.TimeAverage2, 10, 15, 0, Outage).Single().StatusCode.ShouldBe(BadCalc);
Run(HistoryAggregateType.Total2, 10, 15, 0, Outage).Single().StatusCode.ShouldBe(BadCalc);
var i = Run(HistoryAggregateType.Interpolative, 10, 15, 0, Outage).Single();
((double)i.Value!).ShouldBe(10d + 20d * 10d / 15d, 1e-9);
i.StatusCode.ShouldBe(UncertainInterpolated);
@@ -269,10 +278,10 @@ public sealed class TimeWeightedAggregatorTests
}
[Fact]
public void An_uncertain_sample_makes_its_segment_uncertain()
public void Uncertain_time_counts_as_good_time()
{
// 0 = 4 Uncertain, 10 = 6 Good, 20 = 6 Good: [0,10) sloped 4→6, quality Uncertain (worse end) ⇒ mean 5;
// [10,20) 6 Good. Window [0,20), 10 s.
// TreatUncertainAsBad = false (the SDK's time-based status rule): Uncertain time counts toward PercentDataGood.
// 0 = 4 Uncertain, 10 = 6 Good, 20 = 6 Good: [0,10) sloped 4→6 ⇒ mean 5; [10,20) 6. Window [0,20), 10 s.
StoredSample[] s =
[
S(0, HistorianValue.FromDouble(4), Uncertain), S(10, HistorianValue.FromDouble(6), Good),
@@ -280,7 +289,7 @@ public sealed class TimeWeightedAggregatorTests
];
var r = Run(HistoryAggregateType.TimeAverage2, 0, 20, 10, s);
Values(r, 5, 6);
r.Select(x => x.StatusCode).ShouldBe([UncertainCalc, GoodCalc]);
r.Select(x => x.StatusCode).ShouldBe([GoodCalc, GoodCalc]);
}
[Fact]
@@ -322,10 +331,86 @@ public sealed class TimeWeightedAggregatorTests
}
[Fact]
public void A_truncated_last_bucket_uses_its_own_duration_for_Total()
public void A_truncated_last_bucket_uses_its_own_duration_for_Total_and_is_Partial()
{
// Window [0,50), 20 s: B2 = [40,50) is 10 s of the extrapolated 50 ⇒ TimeAverage 50, Total 500.
Values(Run(HistoryAggregateType.Total, 0, 50, 20, A), 400, 800, 500);
var s = Run(HistoryAggregateType.Total, 0, 50, 20, A);
Values(s, 400, 800, 500);
// Only the truncated interval carries the Partial bit.
s.Select(x => x.StatusCode).ShouldBe([GoodCalc, UncertainCalc, GoodCalcPartial]);
}
[Fact]
public void An_outage_with_no_later_sample_is_Bad_to_the_window_end_not_no_data()
{
// 0 = 10 G, then an outage marker at +5 and nothing after: [10,20) lies wholly inside the still-open outage.
StoredSample[] open = [S(0, HistorianValue.FromDouble(10), Good), S(5, HistorianValue.Empty, BadNoCommunication)];
Run(HistoryAggregateType.TimeAverage2, 10, 20, 0, open).Single().StatusCode.ShouldBe(BadCalc);
}
[Fact]
public void A_bad_or_no_data_truncated_interval_carries_no_partial_bit()
{
// Window [0,15), 10 s: B1 = [10,15) is inside the outage ⇒ Bad without Partial.
Run(HistoryAggregateType.TimeAverage2, 0, 15, 10, Outage)[1].StatusCode.ShouldBe(BadCalc);
Run(HistoryAggregateType.TimeAverage2, 0, 15, 10)[1].StatusCode.ShouldBe(NoDataCalc);
}
// ---------------------------------------------------------------- reverse Interpolative (Part 13: anchored at the later time)
[Fact]
public void A_reverse_Interpolative_read_is_anchored_at_its_later_time()
{
// Request At(20) → At(0), 20 s: one point, at At(20) (not At(0)). Bounded: segment 10..30 is 20 flat, Good.
// A forward read of the same window would give the value at At(0) = 10.
var s = TimeWeightedAggregator.Evaluate(HistoryAggregateType.Interpolative,
BucketPlan.Create(At(20), At(0), TimeSpan.FromSeconds(20)), Bounded, Now);
s.Single().SourceTimestampUtc.ShouldBe(At(20));
((double)s.Single().Value!).ShouldBe(20d);
s.Single().StatusCode.ShouldBe(GoodInterpolated);
}
[Fact]
public void A_reverse_Interpolative_read_steps_back_from_the_later_time_latest_first()
{
// Tag A, At(80) → At(0), 20 s: points 80, 60, 40, 20 (latest first). 80 and 60 are past the last sample ⇒ 50
// extrapolated, Uncertain; 40 exact Good 50; 20 sits on the Bad sample ⇒ bridged 30, Uncertain.
var s = TimeWeightedAggregator.Evaluate(HistoryAggregateType.Interpolative,
BucketPlan.Create(At(80), At(0), TimeSpan.FromSeconds(20)), A, Now);
s.Select(x => x.SourceTimestampUtc).ShouldBe([At(80), At(60), At(40), At(20)]);
Values(s, 50, 50, 50, 30);
s.Select(x => x.StatusCode).ShouldBe([UncertainInterpolated, UncertainInterpolated, GoodRaw, UncertainInterpolated]);
}
[Fact]
public void A_reverse_Interpolative_read_with_a_partial_interval_ends_inside_the_window()
{
// At(25) → At(0), 10 s: three intervals ⇒ points 25, 15, 5 (never before the window start).
// Bounded: -10..10 slope 1/s from 0 ⇒ +5 = 15; 10..30 flat 20 ⇒ +15 = 20, +25 = 20.
var s = TimeWeightedAggregator.Evaluate(HistoryAggregateType.Interpolative,
BucketPlan.Create(At(25), At(0), TimeSpan.FromSeconds(10)), Bounded, Now);
s.Select(x => x.SourceTimestampUtc).ShouldBe([At(25), At(15), At(5)]);
Values(s, 20, 20, 15);
}
// ---------------------------------------------------------------- raw-row cap helpers
[Theory]
[InlineData(1_000_000, 1_000_001)]
[InlineData(1, 2)]
[InlineData(0, int.MaxValue)]
[InlineData(-5, int.MaxValue)]
[InlineData(int.MaxValue, int.MaxValue)]
public void The_window_fetch_limit_is_one_past_the_cap(int cap, int expected) =>
TimeWeightedAggregator.WindowFetchLimit(cap).ShouldBe(expected);
[Fact]
public void The_window_row_check_fails_only_past_a_positive_cap()
{
TimeWeightedAggregator.CheckWindowRows(4, 4, "T");
TimeWeightedAggregator.CheckWindowRows(5_000_000, 0, "T");
var ex = Should.Throw<HistoryReadLimitExceededException>(() => TimeWeightedAggregator.CheckWindowRows(5, 4, "T"));
ex.Limit.ShouldBe(4);
}
[Fact]
@@ -44,8 +44,9 @@ internal sealed class ReadTestDb
}
/// <summary>A fresh data source (fresh catalog cache) over this schema; <paramref name="clock"/> is its "now".</summary>
public SqlServerHistorianDataSource Source(TimeProvider? clock = null) =>
new(Conn, Boot, new SqlServerTagCatalog(Conn, Boot), timeProvider: clock);
public SqlServerHistorianDataSource Source(TimeProvider? clock = null,
int maxTimeWeightedRawRows = TimeWeightedAggregator.DefaultMaxWindowRows) =>
new(Conn, Boot, new SqlServerTagCatalog(Conn, Boot), timeProvider: clock, maxTimeWeightedRawRows: maxTimeWeightedRawRows);
/// <summary>Inserts a tag row and the given samples. ServerTimeUtc = source time + 1 s (so tests can tell them apart).</summary>
public async Task<int> SeedAsync(string tag, params (DateTime T, HistorianValue V, uint Status)[] samples)
@@ -25,6 +25,9 @@ internal sealed class SqlServerConformanceBackend : IConformanceBackend
/// <inheritdoc/>
public IHistorianDataSource CreateDataSource(TimeProvider? clock = null) => _db.Source(clock);
/// <inheritdoc/>
public IHistorianDataSource CreateDataSource(int maxTimeWeightedRawRows) => _db.Source(null, maxTimeWeightedRawRows);
/// <inheritdoc/>
public IHistorianValueWriter CreateValueWriter(Func<DateTime>? utcNow = null) =>
new SqlServerHistorianValueWriter(_db.Conn, _db.Boot, new SqlServerTagCatalog(_db.Conn, _db.Boot), utcNow: utcNow);
@@ -342,6 +342,28 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
await host.DisposeAsync();
}
/// <summary>#671: a read past a backend size limit (the time-weighted raw-row cap) answers BadTooManyOperations
/// for that node (not the generic BadHistoryOperationUnsupported, nor a deadline BadTimeout).</summary>
[Fact]
public async Task Processed_limit_exceeded_yields_BadTooManyOperations()
{
var (host, server) = await BootAsync();
var nm = server.NodeManager!;
nm.HistorianDataSource = new RecordingHistorianDataSource { LimitExceeded = true };
nm.EnsureVariable("eq-1/cap", parentFolderNodeId: null, displayName: "C", dataType: "Float",
writable: false, historianTagname: "WW.Cap", realm: AddressSpaceRealm.Uns);
var nodeId = nm.TryGetVariable("eq-1/cap")!.NodeId;
var (_, errors) = InvokeHistoryRead(server, nm, new ReadProcessedDetails
{
StartTime = DateTime.UtcNow.AddHours(-1), EndTime = DateTime.UtcNow, ProcessingInterval = 10_000.0,
AggregateType = new NodeIdCollection { ObjectIds.AggregateFunction_Total },
}, nodeId);
errors[0].StatusCode.Code.ShouldBe(StatusCodes.BadTooManyOperations);
await host.DisposeAsync();
}
/// <summary>AtTime read: the requested timestamps reach ReadAtTimeAsync in order.</summary>
[Fact]
public async Task AtTime_dispatches_requested_timestamps()
@@ -505,6 +527,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
{
public bool ThrowOnRead { get; init; }
public bool AggregateNotSupported { get; init; }
public bool LimitExceeded { get; init; }
public HistorianRead RawResult { get; set; } = new(Array.Empty<DataValueSnapshot>(), null);
public HistorianRead ProcessedResult { get; set; } = new(Array.Empty<DataValueSnapshot>(), null);
public HistorianRead AtTimeResult { get; set; } = new(Array.Empty<DataValueSnapshot>(), null);
@@ -537,6 +560,7 @@ public sealed class NodeManagerHistoryReadTests : IDisposable
{
if (ThrowOnRead) throw new InvalidOperationException("backend boom");
if (AggregateNotSupported) throw new HistoryAggregateNotSupportedException(aggregate);
if (LimitExceeded) throw new HistoryReadLimitExceededException(4, "too many raw rows");
LastCall = "Processed";
LastTagname = fullReference;
LastStart = startUtc;
@@ -89,6 +89,16 @@ public sealed class ServerHistorianOptionsTests
Assert.Contains(w, m => m.Contains("HistoryReadDeadline"));
}
[Fact]
public void MaxTimeWeightedRawRows_defaults_to_one_million_and_warns_when_nonpositive()
{
Assert.Equal(1_000_000, new ServerHistorianOptions().MaxTimeWeightedRawRows);
var w = new ServerHistorianOptions
{ Enabled = true, Endpoint = "https://h:5222", ApiKey = "histgw_x_y", MaxTimeWeightedRawRows = 0 }
.Validate();
Assert.Contains(w, m => m.Contains("MaxTimeWeightedRawRows"));
}
[Fact]
public void Disabled_with_nonpositive_HistoryRead_knobs_is_silent()
{