Joseph Doherty
52 lines
2.1 KiB
C#
52 lines
2.1 KiB
C#
using ZB.MOM.WW.Auth.Ldap.Internal;
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namespace ZB.MOM.WW.Auth.Ldap.Tests;
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/// <summary>
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/// Test double for <see cref="ILdapConnectionFactory"/> that hands out pre-scripted
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/// <see cref="FakeLdapConnection"/> instances in order, one per <see cref="Create"/> call —
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/// exactly matching the failover walk, which opens a fresh connection per endpoint attempt.
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/// Records every created connection for inspection. When the script runs out, returns a
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/// bare unscripted fake (which yields user-not-found) so a miscounted test fails loudly
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/// rather than reusing a stale fake.
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/// </summary>
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internal sealed class SequenceLdapConnectionFactory : ILdapConnectionFactory
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{
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private readonly Queue<FakeLdapConnection> _script;
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/// <summary>Scripts the connections handed out, in the order the walk will request them.</summary>
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public SequenceLdapConnectionFactory(params FakeLdapConnection[] fakes)
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=> _script = new Queue<FakeLdapConnection>(fakes);
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/// <summary>Every connection handed out, in creation order (scripted or overflow).</summary>
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public List<FakeLdapConnection> Created { get; } = new();
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/// <inheritdoc />
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public ILdapConnection Create()
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{
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var fake = _script.Count > 0 ? _script.Dequeue() : new FakeLdapConnection();
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Created.Add(fake);
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return fake;
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}
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}
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// ---------------------------------------------------------------------------
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// Smoke test: verifies the sequencing and overflow behaviour the failover tests rely on.
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// ---------------------------------------------------------------------------
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public class SequenceLdapConnectionFactorySmokeTests
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{
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[Fact]
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public void Create_ReturnsScriptedFakesInOrder_ThenOverflows()
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{
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var first = new FakeLdapConnection().ThrowOnConnect();
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var second = new FakeLdapConnection();
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var factory = new SequenceLdapConnectionFactory(first, second);
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Assert.Same(first, factory.Create());
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Assert.Same(second, factory.Create());
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Assert.NotSame(second, factory.Create()); // overflow: fresh bare fake
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Assert.Equal(3, factory.Created.Count);
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}
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}
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