GameCult.Thing.Contract.Tests: the reopen test moves the schema id with the type name; goldens README keeps its line endings
A store whose id still matches the local registry is not compared, so the patched store changes the id and Int64 together, as a real shape change does. Presence threshold set to the measured 174 required slots. goldens/README.md is the base file plus the nil-vector section (the earlier commit rewrote its line endings). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Meta Vens
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@ -1,48 +1,48 @@
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# thing-contract goldens
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Written only by `crates/thing-contract/tests/goldens.rs`, with `THING_BLESS=1` set on that test.
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Every other run compares byte for byte. The TypeScript and C# packages and core decode these files
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and are held to the answers below; none of them writes one.
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Each `.bin` is the payload of one record: the positional slot array of its kind, as MessagePack.
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A union value is `[armKey, [armSlots...]]`; a unit arm is `[key, []]`. An optional member is nil
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when absent. Arm keys are fixed for v1.
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## Values (decode to the constructed value, re-encode to the same bytes)
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| File | Kind | Decodes to |
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|---|---|---|
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| `surface-all-arms.bin` | `gamecult.thing.surface.v1` | One surface with all 13 node arms (Box 0, Text 1, Image 2, Button 3, Toggle 4, Slider 5, TextInput 6 as both input kinds, Text 0 and Number 1, Select 7, Repeat 8, Overlay 9, Plot 10, Embed 11, Use 12), a Box chain four levels deep, every text, number and bool source arm, every Format arm, both state sources, both member steps, every dimension and colour arm, and two declared commands |
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| `composition-all-params.bin` | `gamecult.thing.composition.v1` | A composition with one parameter of each of the 7 kinds, whose body uses a composition with one argument of each of the 7 argument arms |
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| `invocation-all-inputs.bin` | `gamecult.thing.command_invocation.v1` | An invocation with a payload record of bin bytes and one captured input of each of the 4 input arms |
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| `result-pending.bin` | `gamecult.thing.command_result.v1` | Outcome Pending, seq 1 |
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| `result-completed.bin` | same | Outcome Completed with source version 8, drafts cleared, no effect |
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| `result-completed-open-surface.bin` | same | Completed with no source version and the OpenSurface effect |
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| `result-completed-open-external.bin` | same | Completed with the OpenExternal effect and a resume command |
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| `result-denied.bin` | same | Denied naming a node |
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| `result-denied-no-node.bin` | same | Denied with a nil node |
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| `result-failed.bin` | same | Failed |
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| `asset-catalog.bin` | `gamecult.thing.asset_catalog.v1` | Two assets |
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| `surface.cc` | single-file store | One record of each of the five kinds, written under the pinned clock `2026-01-01T00:00:00Z`; reading it and writing it again gives the same bytes |
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## Refusals and tolerance
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| File | Payload | Expected |
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|---|---|---|
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| `result-thing1-flat.bin` | a MessagePack map with named members, the shape a Thing 1 provider wrote for a command result | refused when stored as a command result; the error names the kind and the record key and never a value |
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| `node-unknown-arm.bin` | a surface whose root node has arm key 13, which Node does not declare | refused; the error names the kind and the record key, and decoded directly it names the union Node and the key 13, and never a value |
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| `outcome-unknown-arm.bin` | a result whose outcome has arm key 4, which Outcome does not declare | refused in the same way, naming the union Outcome and the key 4 |
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| `result-extra-slot.bin` | a Pending result with a fourth slot past the last one declared | read: it decodes to the Pending result with seq 1 (CultLib's extra-trailing-slots ruling: read, never written back) |
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| `result-seq-zero.bin` | a result whose seq slot is 0 | refused; the error names the kind and the record key, decoded directly it names Seq, and never a value |
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| `surface-version-negative.bin` | a surface whose version slot is -1 | refused in the same way, naming Version |
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| `surface-label-dotted.bin` | a surface whose label is `b.c` | refused in the same way, naming Segment: a label holds no dot, so a record key splits at its last dot |
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| `asset-extent-negative.bin` | an asset catalog whose first asset has width -5 | refused in the same way, naming Count |
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| `rgba-channel-out-of-range.bin` | the Rgba slot array `[256, 0, 0, 255]` | refused when decoded as an Rgba: a channel is a byte, 0 to 255 |
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Domain refusals are the contract's rule, which the TypeScript and C# packages mirror: each is held to refuse these files, without the leaf set a Rust `u8` or a checked newtype has.
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## The nil vector
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`nil-positions.tsv` is written only by `crates/thing-contract/tests/nil_positions.rs` (`THING_BLESS=1`). For every element inside an array, at every depth, of each value golden above except `surface.cc` (the eleven `.bin` files from `surface-all-arms` to `asset-catalog`), the test replaces that element with nil (`0xC0`) and decodes the whole payload with the Rust decode door, `rmp_serde::from_slice` into the golden's kind. A row is `golden`, `path` (dotted array indices from the root, e.g. `3.0.1`), the element's byte `start` and `end` in the golden, and `ACCEPT` or `REFUSE`. An accepted variant re-encodes to the spliced bytes. Maps are not walked.
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A slot is required exactly when its Rust type is not optional, so `REFUSE` rows are the required slots and `ACCEPT` rows the optional ones. The Rust decode door decides every row; the TypeScript and C# packages keep no list of required slots and are held to every row.
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# thing-contract goldens
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Written only by `crates/thing-contract/tests/goldens.rs`, with `THING_BLESS=1` set on that test.
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Every other run compares byte for byte. The TypeScript and C# packages and core decode these files
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and are held to the answers below; none of them writes one.
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Each `.bin` is the payload of one record: the positional slot array of its kind, as MessagePack.
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A union value is `[armKey, [armSlots...]]`; a unit arm is `[key, []]`. An optional member is nil
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when absent. Arm keys are fixed for v1.
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## Values (decode to the constructed value, re-encode to the same bytes)
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| File | Kind | Decodes to |
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|---|---|---|
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| `surface-all-arms.bin` | `gamecult.thing.surface.v1` | One surface with all 13 node arms (Box 0, Text 1, Image 2, Button 3, Toggle 4, Slider 5, TextInput 6 as both input kinds, Text 0 and Number 1, Select 7, Repeat 8, Overlay 9, Plot 10, Embed 11, Use 12), a Box chain four levels deep, every text, number and bool source arm, every Format arm, both state sources, both member steps, every dimension and colour arm, and two declared commands |
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| `composition-all-params.bin` | `gamecult.thing.composition.v1` | A composition with one parameter of each of the 7 kinds, whose body uses a composition with one argument of each of the 7 argument arms |
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| `invocation-all-inputs.bin` | `gamecult.thing.command_invocation.v1` | An invocation with a payload record of bin bytes and one captured input of each of the 4 input arms |
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| `result-pending.bin` | `gamecult.thing.command_result.v1` | Outcome Pending, seq 1 |
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| `result-completed.bin` | same | Outcome Completed with source version 8, drafts cleared, no effect |
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| `result-completed-open-surface.bin` | same | Completed with no source version and the OpenSurface effect |
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| `result-completed-open-external.bin` | same | Completed with the OpenExternal effect and a resume command |
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| `result-denied.bin` | same | Denied naming a node |
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| `result-denied-no-node.bin` | same | Denied with a nil node |
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| `result-failed.bin` | same | Failed |
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| `asset-catalog.bin` | `gamecult.thing.asset_catalog.v1` | Two assets |
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| `surface.cc` | single-file store | One record of each of the five kinds, written under the pinned clock `2026-01-01T00:00:00Z`; reading it and writing it again gives the same bytes |
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## Refusals and tolerance
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| File | Payload | Expected |
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|---|---|---|
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| `result-thing1-flat.bin` | a MessagePack map with named members, the shape a Thing 1 provider wrote for a command result | refused when stored as a command result; the error names the kind and the record key and never a value |
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| `node-unknown-arm.bin` | a surface whose root node has arm key 13, which Node does not declare | refused; the error names the kind and the record key, and decoded directly it names the union Node and the key 13, and never a value |
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| `outcome-unknown-arm.bin` | a result whose outcome has arm key 4, which Outcome does not declare | refused in the same way, naming the union Outcome and the key 4 |
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| `result-extra-slot.bin` | a Pending result with a fourth slot past the last one declared | read: it decodes to the Pending result with seq 1 (CultLib's extra-trailing-slots ruling: read, never written back) |
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| `result-seq-zero.bin` | a result whose seq slot is 0 | refused; the error names the kind and the record key, decoded directly it names Seq, and never a value |
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| `surface-version-negative.bin` | a surface whose version slot is -1 | refused in the same way, naming Version |
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| `surface-label-dotted.bin` | a surface whose label is `b.c` | refused in the same way, naming Segment: a label holds no dot, so a record key splits at its last dot |
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| `asset-extent-negative.bin` | an asset catalog whose first asset has width -5 | refused in the same way, naming Count |
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| `rgba-channel-out-of-range.bin` | the Rgba slot array `[256, 0, 0, 255]` | refused when decoded as an Rgba: a channel is a byte, 0 to 255 |
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Domain refusals are the contract's rule, which the TypeScript and C# packages mirror: each is held to refuse these files, without the leaf set a Rust `u8` or a checked newtype has.
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## The nil vector
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`nil-positions.tsv` is written only by `crates/thing-contract/tests/nil_positions.rs` (`THING_BLESS=1`). For every element inside an array, at every depth, of each value golden above except `surface.cc` (the eleven `.bin` files from `surface-all-arms` to `asset-catalog`), the test replaces that element with nil (`0xC0`) and decodes the whole payload with the Rust decode door, `rmp_serde::from_slice` into the golden's kind. A row is `golden`, `path` (dotted array indices from the root, e.g. `3.0.1`), the element's byte `start` and `end` in the golden, and `ACCEPT` or `REFUSE`. An accepted variant re-encodes to the spliced bytes. Maps are not walked.
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A slot is required exactly when its Rust type is not optional, so `REFUSE` rows are the required slots and `ACCEPT` rows the optional ones. The Rust decode door decides every row; the TypeScript and C# packages keep no list of required slots and are held to every row.
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@ -35,6 +35,19 @@ public sealed class NameSetTests
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Assert.That(actual, Has.Length.GreaterThan(150));
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}
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private static int Replace(byte[] bytes, byte[] from, byte[] to)
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{
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var count = 0;
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for (var i = 0; i + from.Length <= bytes.Length; i++)
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{
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if (!bytes.AsSpan(i, from.Length).SequenceEqual(from)) continue;
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to.CopyTo(bytes, i);
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count++;
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}
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return count;
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}
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[Test]
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public void AStoreWhoseRecordedTypeNameChangedIsRefusedOnReopen()
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{
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@ -50,24 +63,22 @@ public sealed class NameSetTests
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using (var cache = CultCacheMessagePack.Create(scratch, new CultCacheOpenOptions { Registry = Wire.Registry, ReadOnly = true }))
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Assert.That(cache.GetAll<AssetCatalog>().Single().Assets, Has.Count.EqualTo(2), "the unpatched store reopens");
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// A store written by a different type shape carries a different schema id and different type names. The
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// reopen compares names only when the ids differ, so the patch moves both: the id's last digit and Int64.
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var id = Wire.Registry.GetRequired(typeof(AssetCatalog)).ToCatalogEntry().SchemaId;
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var movedId = id[..^1] + (id[^1] == '0' ? '1' : '0');
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var bytes = File.ReadAllBytes(scratch);
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var from = "System.Int64"u8.ToArray();
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var to = "System.Int32"u8.ToArray();
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var patched = 0;
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for (var i = 0; i + from.Length <= bytes.Length; i++)
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{
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if (!bytes.AsSpan(i, from.Length).SequenceEqual(from)) continue;
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to.CopyTo(bytes, i);
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patched++;
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}
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var patched = Replace(bytes, System.Text.Encoding.UTF8.GetBytes(id), System.Text.Encoding.UTF8.GetBytes(movedId))
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+ Replace(bytes, "System.Int64"u8.ToArray(), "System.Int32"u8.ToArray());
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Assert.That(patched, Is.GreaterThan(0), "the store records the type name");
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File.WriteAllBytes(scratch, bytes);
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var error = Assert.Catch(() =>
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{
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using var cache = CultCacheMessagePack.Create(scratch, new CultCacheOpenOptions { Registry = Wire.Registry, ReadOnly = true });
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_ = cache.GetAll<AssetCatalog>().ToList();
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})!;
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TestContext.Progress.WriteLine($"NAMEPATCH patched={patched} refused-by: {Wire.Flatten(error)}");
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Assert.That(Wire.Flatten(error), Does.Contain("System.Int64").And.Contain("System.Int32"), "the refusal is the type-name comparison");
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}
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finally
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{
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@ -51,7 +51,7 @@ public sealed class PresenceTests
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Assert.That(failures, Is.Empty);
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TestContext.Progress.WriteLine($"PRESENCE required={required} optional={optional}");
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Assert.That(required, Is.GreaterThan(200), "the scan reached the required slots");
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Assert.That(required, Is.GreaterThan(150), "the scan reached the required slots");
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Assert.That(optional, Is.GreaterThan(15), "the scan reached the optional slots");
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}
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