feat(audit): redactor + writer helpers (Null/Truncating/NoOp/Composite/Redacting)

Code-review fixes: CompositeAuditWriter re-throws OperationCanceledException (honors cancellation) + evt null-guard; RedactingAuditWriter evt null-guard; added marker-longer-than-max and cancellation-propagation regression tests.
2026-06-01 07:28:13 -04:00
parent 3934e528f2
commit 453ec7358d
11 changed files with 283 additions and 0 deletions
@@ -0,0 +1,26 @@
+namespace ZB.MOM.WW.Audit.Tests;
+
+public class RedactingAuditWriterTests
+{
+    private sealed class CapturingWriter : IAuditWriter
+    {
+        public AuditEvent? Last;
+        public Task WriteAsync(AuditEvent evt, CancellationToken ct = default) { Last = evt; return Task.CompletedTask; }
+    }
+    private sealed class StampRedactor : IAuditRedactor
+    {
+        public AuditEvent Apply(AuditEvent rawEvent) => rawEvent with { DetailsJson = "redacted" };
+    }
+
+    private static AuditEvent Evt() => new() { EventId = Guid.NewGuid(), OccurredAtUtc = DateTimeOffset.UtcNow,
+        Actor = "a", Action = "x", Outcome = AuditOutcome.Success, DetailsJson = "secret" };
+
+    [Fact]
+    public async Task Inner_writer_receives_the_redacted_event()
+    {
+        var inner = new CapturingWriter();
+        var sut = new RedactingAuditWriter(new StampRedactor(), inner);
+        await sut.WriteAsync(Evt());
+        Assert.Equal("redacted", inner.Last!.DetailsJson);
+    }
+}