Joseph Doherty
348 lines
16 KiB
C#
348 lines
16 KiB
C#
using System.Reflection;
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using ZB.MOM.WW.ScadaBridge.Commons.Messages.Artifacts;
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namespace ZB.MOM.WW.ScadaBridge.DeploymentManager.Tests;
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/// <summary>
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/// Tests for <see cref="ArtifactRevisionHashService"/>, the deterministic hash behind the
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/// Sites page's "artifacts out of date" indicator. The hash must depend on the artifact
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/// CONTENT only — never on deployment id, timestamp, or repository row order — or the
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/// indicator either never clears or never fires.
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/// </summary>
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public class ArtifactRevisionHashServiceTests
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{
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private readonly ArtifactRevisionHashService _sut = new();
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private static DeployArtifactsCommand Command(
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string deploymentId = "dep-1",
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DateTimeOffset? timestamp = null,
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IReadOnlyList<SharedScriptArtifact>? sharedScripts = null,
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IReadOnlyList<ExternalSystemArtifact>? externalSystems = null,
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IReadOnlyList<DatabaseConnectionArtifact>? databaseConnections = null,
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IReadOnlyList<DataConnectionArtifact>? dataConnections = null) =>
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new(deploymentId,
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sharedScripts ??
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[
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new SharedScriptArtifact("Alpha", "return 1;", "{\"p\":1}", "{\"r\":1}"),
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new SharedScriptArtifact("Beta", "return 2;", null, null)
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],
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externalSystems ??
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[
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new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", "{\"key\":\"k\"}",
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"[{\"Name\":\"MoveOut\"},{\"Name\":\"MoveIn\"}]", 30, 6, TimeSpan.FromSeconds(120)),
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new ExternalSystemArtifact("Erp", "https://erp", "BasicAuth", null, null)
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],
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databaseConnections ??
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[
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new DatabaseConnectionArtifact("Historian", "Server=h;", 4, TimeSpan.FromSeconds(30)),
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new DatabaseConnectionArtifact("Mes", "Server=m;", 0, TimeSpan.Zero)
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],
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NotificationLists: null,
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dataConnections ??
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[
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new DataConnectionArtifact("Opc", "OpcUa", "{\"url\":\"opc.tcp://x\"}", null, 3),
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new DataConnectionArtifact("Mx", "MxGateway", "{\"host\":\"gw\"}", "{\"host\":\"gw2\"}", 5)
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],
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SmtpConfigurations: null,
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timestamp ?? DateTimeOffset.UtcNow);
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private static SecretArtifact Secret(string name, long rev) =>
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new(name, "text/plain",
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Ciphertext: [1, 2, 3],
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Nonce: [4, 5],
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Tag: [6, 7],
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WrappedDek: [8, 9],
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WrapNonce: [10, 11],
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WrapTag: [12, 13],
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KekId: "kek-1",
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Revision: rev,
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CreatedUtc: DateTimeOffset.Parse("2026-01-01T00:00:00Z"),
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UpdatedUtc: DateTimeOffset.Parse("2026-01-02T00:00:00Z"));
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private static DeployArtifactsCommand Cmd(
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IReadOnlyList<SecretArtifact>? secrets = null,
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IReadOnlyList<string>? missing = null) =>
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Command() with { Secrets = secrets, MissingSecrets = missing };
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[Fact]
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public void SecretChanges_MoveTheHash_ButOrderDoesNot()
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{
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var svc = new ArtifactRevisionHashService();
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var a = Secret("A", rev: 1);
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var b = Secret("B", rev: 1);
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var baseline = svc.ComputeHash(Cmd(secrets: [a, b]));
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Assert.Equal(baseline, svc.ComputeHash(Cmd(secrets: [b, a])));
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Assert.NotEqual(baseline, svc.ComputeHash(Cmd(secrets: [a with { Revision = 2 }, b])));
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Assert.NotEqual(baseline, svc.ComputeHash(Cmd(secrets: [a with { WrappedDek = [42] }, b])));
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Assert.NotEqual(baseline, svc.ComputeHash(Cmd(secrets: [a with { KekId = "kek-B" }, b])));
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}
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[Fact]
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public void MissingSecret_HashesDifferentlyFromPresent()
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{
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var svc = new ArtifactRevisionHashService();
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Assert.NotEqual(
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svc.ComputeHash(Cmd(secrets: [Secret("A", 1)])),
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svc.ComputeHash(Cmd(missing: ["A"])));
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}
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[Fact]
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public void ComputeHash_PreSecretsGoldenValue_IsUnchanged()
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{
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// Captured on HEAD 738e4587 — BEFORE Task 4 wired Secrets/MissingSecrets into the
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// projection — using the fixed default baseline (one of each existing artifact
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// kind) with a pinned deploymentId/timestamp. A command with Secrets == null and
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// MissingSecrets == null must keep hashing to this exact value after Task 4, or a
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// site with no secret references would spuriously flip to "out of date".
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var golden = Command(
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deploymentId: "golden",
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timestamp: DateTimeOffset.Parse("2026-09-28T00:00:00Z"));
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Assert.Equal(
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"sha256:949f2c9c6d80432f94e9c2ad2a669b020a33c4a69653cf1b7b2b0aa217a467b0",
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_sut.ComputeHash(golden));
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}
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[Fact]
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public void ComputeHash_SameInputTwice_ProducesSameHash()
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{
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var timestamp = DateTimeOffset.UtcNow;
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Assert.Equal(
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_sut.ComputeHash(Command(timestamp: timestamp)),
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_sut.ComputeHash(Command(timestamp: timestamp)));
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}
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[Fact]
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public void ComputeHash_IsSha256HexEncoded()
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{
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var hash = _sut.ComputeHash(Command());
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// Same encoding as RevisionHashService: "sha256:" + 64 lower-case hex chars.
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Assert.StartsWith("sha256:", hash);
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var digest = hash["sha256:".Length..];
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Assert.Equal(64, digest.Length);
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Assert.All(digest, c => Assert.Contains(c, "0123456789abcdef"));
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}
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[Fact]
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public void ComputeHash_ReorderedArtifactLists_ProducesSameHash()
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{
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// Repository row order must never leak into the hash — otherwise an unrelated
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// insert would flag every site out of date.
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var baseline = Command();
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var reordered = baseline with
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{
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SharedScripts = baseline.SharedScripts!.Reverse().ToList(),
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ExternalSystems = baseline.ExternalSystems!.Reverse().ToList(),
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DatabaseConnections = baseline.DatabaseConnections!.Reverse().ToList(),
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DataConnections = baseline.DataConnections!.Reverse().ToList()
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};
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Assert.Equal(_sut.ComputeHash(baseline), _sut.ComputeHash(reordered));
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}
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[Fact]
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public void ComputeHash_ReorderedExternalSystemMethods_ProducesSameHash()
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{
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// MethodDefinitionsJson is itself a serialized collection; it is re-canonicalised
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// with the methods sorted by name so method row order cannot move the hash either.
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var a = Command(externalSystems:
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[
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new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", null,
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"[{\"Name\":\"MoveOut\",\"HttpMethod\":\"POST\"},{\"Name\":\"MoveIn\",\"HttpMethod\":\"POST\"}]")
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]);
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var b = Command(externalSystems:
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[
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new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", null,
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"[{\"Name\":\"MoveIn\",\"HttpMethod\":\"POST\"},{\"Name\":\"MoveOut\",\"HttpMethod\":\"POST\"}]")
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]);
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Assert.Equal(_sut.ComputeHash(a), _sut.ComputeHash(b));
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}
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[Fact]
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public void ComputeHash_ReorderedCamelCaseMethodNames_ProducesSameHash()
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{
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// The method-name lookup is case-insensitive so that a naming-policy change at the
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// producer (PascalCase anonymous type today) cannot silently degrade the sort into a
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// no-op and let repository row order move the hash again.
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var a = Command(externalSystems:
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[
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new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", null,
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"[{\"name\":\"MoveOut\"},{\"name\":\"MoveIn\"}]")
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]);
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var b = Command(externalSystems:
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[
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new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", null,
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"[{\"name\":\"MoveIn\"},{\"name\":\"MoveOut\"}]")
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]);
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Assert.Equal(_sut.ComputeHash(a), _sut.ComputeHash(b));
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}
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[Fact]
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public void ComputeHash_UnparseableMethodDefinitions_StillParticipatesInTheHash()
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{
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// Non-array / non-JSON payloads pass through verbatim: the order guarantee is lost
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// (there is nothing to sort), but a content change must still move the hash.
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var a = Command(externalSystems:
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[new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", null, "not json")]);
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var b = Command(externalSystems:
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[new ExternalSystemArtifact("Mes", "https://mes", "ApiKey", null, "not json either")]);
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Assert.NotEqual(_sut.ComputeHash(a), _sut.ComputeHash(b));
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}
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[Fact]
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public void ComputeHash_DifferentDeploymentIdAndTimestamp_ProducesSameHash()
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{
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// The whole point of the stamp: two deploys of identical definitions must hash the
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// same, or every redeploy would look like a change.
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var a = Command("dep-1", DateTimeOffset.UtcNow);
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var b = Command("dep-2", DateTimeOffset.UtcNow.AddDays(3));
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Assert.Equal(_sut.ComputeHash(a), _sut.ComputeHash(b));
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}
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[Fact]
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public void ComputeHash_EmptyAndNullArtifactLists_HashIdentically()
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{
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var withNulls = new DeployArtifactsCommand(
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"dep", null, null, null, null, null, null, DateTimeOffset.UtcNow);
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var withEmpties = new DeployArtifactsCommand(
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"dep", [], [], [], [], [], [], DateTimeOffset.UtcNow);
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Assert.Equal(_sut.ComputeHash(withNulls), _sut.ComputeHash(withEmpties));
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}
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[Fact]
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public void ComputeHash_NotificationAndSmtpArtifacts_DoNotAffectTheHash()
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{
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// Central never populates these (notification delivery is central-only), so they
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// are excluded from the projection entirely.
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var baseline = Command();
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var withCentralOnlyPayload = baseline with
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{
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NotificationLists = [new NotificationListArtifact("Ops", ["a@b.c"])],
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SmtpConfigurations =
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[new SmtpConfigurationArtifact("Main", "smtp", 25, "Basic", "a@b.c", null, null, null)]
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};
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Assert.Equal(_sut.ComputeHash(baseline), _sut.ComputeHash(withCentralOnlyPayload));
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}
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public static TheoryData<string, DeployArtifactsCommand> ChangedFieldCases()
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{
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var data = new TheoryData<string, DeployArtifactsCommand>();
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void Add(string field, DeployArtifactsCommand command) => data.Add(field, command);
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// SharedScriptArtifact — every field.
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Add("script.Name", Command(sharedScripts: [new SharedScriptArtifact("Renamed", "c", "p", "r")]));
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Add("script.Code", Command(sharedScripts: [new SharedScriptArtifact("S", "changed", "p", "r")]));
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Add("script.ParameterDefinitions", Command(sharedScripts: [new SharedScriptArtifact("S", "c", "changed", "r")]));
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Add("script.ReturnDefinition", Command(sharedScripts: [new SharedScriptArtifact("S", "c", "p", "changed")]));
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// ExternalSystemArtifact — every field.
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Add("externalSystem.Name",
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Command(externalSystems: [new ExternalSystemArtifact("Renamed", "u", "ApiKey", "a", "[]", 1, 2, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.EndpointUrl",
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Command(externalSystems: [new ExternalSystemArtifact("E", "changed", "ApiKey", "a", "[]", 1, 2, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.AuthType",
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "BasicAuth", "a", "[]", 1, 2, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.AuthConfiguration",
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "ApiKey", "changed", "[]", 1, 2, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.MethodDefinitionsJson",
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "ApiKey", "a", "[{\"Name\":\"M\"}]", 1, 2, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.TimeoutSeconds",
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "ApiKey", "a", "[]", 99, 2, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.MaxRetries",
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "ApiKey", "a", "[]", 1, 99, TimeSpan.FromSeconds(3))]));
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Add("externalSystem.RetryDelay",
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "ApiKey", "a", "[]", 1, 2, TimeSpan.FromSeconds(99))]));
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// DatabaseConnectionArtifact — every field.
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Add("databaseConnection.Name",
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Command(databaseConnections: [new DatabaseConnectionArtifact("Renamed", "cs", 1, TimeSpan.FromSeconds(2))]));
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Add("databaseConnection.ConnectionString",
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Command(databaseConnections: [new DatabaseConnectionArtifact("D", "changed", 1, TimeSpan.FromSeconds(2))]));
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Add("databaseConnection.MaxRetries",
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Command(databaseConnections: [new DatabaseConnectionArtifact("D", "cs", 99, TimeSpan.FromSeconds(2))]));
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Add("databaseConnection.RetryDelay",
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Command(databaseConnections: [new DatabaseConnectionArtifact("D", "cs", 1, TimeSpan.FromSeconds(99))]));
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// DataConnectionArtifact — every field.
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Add("dataConnection.Name",
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Command(dataConnections: [new DataConnectionArtifact("Renamed", "OpcUa", "p", "b", 1)]));
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Add("dataConnection.Protocol",
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Command(dataConnections: [new DataConnectionArtifact("C", "MxGateway", "p", "b", 1)]));
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Add("dataConnection.PrimaryConfigurationJson",
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Command(dataConnections: [new DataConnectionArtifact("C", "OpcUa", "changed", "b", 1)]));
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Add("dataConnection.BackupConfigurationJson",
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Command(dataConnections: [new DataConnectionArtifact("C", "OpcUa", "p", "changed", 1)]));
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Add("dataConnection.FailoverRetryCount",
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Command(dataConnections: [new DataConnectionArtifact("C", "OpcUa", "p", "b", 99)]));
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return data;
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}
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[Theory]
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[MemberData(nameof(ChangedFieldCases))]
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public void ComputeHash_EveryArtifactField_ParticipatesInTheHash(
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string changedField, DeployArtifactsCommand changed)
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{
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// Each case is the same command with ONE artifact field differing from the
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// per-class baseline below; a field silently dropped from the projection would
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// make the two hashes equal and leave that edit invisible to the indicator.
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var baselines = new Dictionary<string, DeployArtifactsCommand>(StringComparer.Ordinal)
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{
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["script"] = Command(sharedScripts: [new SharedScriptArtifact("S", "c", "p", "r")]),
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["externalSystem"] =
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Command(externalSystems: [new ExternalSystemArtifact("E", "u", "ApiKey", "a", "[]", 1, 2, TimeSpan.FromSeconds(3))]),
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["databaseConnection"] =
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Command(databaseConnections: [new DatabaseConnectionArtifact("D", "cs", 1, TimeSpan.FromSeconds(2))]),
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["dataConnection"] =
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Command(dataConnections: [new DataConnectionArtifact("C", "OpcUa", "p", "b", 1)]),
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};
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var baseline = baselines[changedField.Split('.')[0]];
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Assert.NotEqual(_sut.ComputeHash(baseline), _sut.ComputeHash(changed));
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}
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[Fact]
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public void HashableRecords_PropertiesDeclaredAlphabetically()
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{
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// Artifact-hash determinism depends entirely on the private Hashable* records
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// declaring their properties in alphabetical order (System.Text.Json emits
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// properties in CLR declaration order and does not sort). Without this guard a
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// contributor could silently change every site's artifact hash — flagging the
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// whole fleet out of date — by adding a property out of order. Mirrors
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// RevisionHashServiceTests.HashableRecords_PropertiesDeclaredAlphabetically.
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var nested = typeof(ArtifactRevisionHashService)
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.GetNestedTypes(BindingFlags.NonPublic)
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.Where(t => t.Name.StartsWith("Hashable", StringComparison.Ordinal))
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.ToList();
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Assert.NotEmpty(nested);
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foreach (var type in nested)
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{
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var propNames = type
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.GetProperties(BindingFlags.Public | BindingFlags.Instance)
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.Where(p => p.Name != "EqualityContract")
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.Select(p => p.Name)
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.ToList();
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var sorted = propNames.OrderBy(n => n, StringComparer.Ordinal).ToList();
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Assert.True(
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propNames.SequenceEqual(sorted),
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$"{type.Name} properties must be declared alphabetically. " +
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$"Declared: [{string.Join(", ", propNames)}] Expected: [{string.Join(", ", sorted)}]");
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}
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}
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}
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