Joseph Doherty
36 lines
1.8 KiB
C#
36 lines
1.8 KiB
C#
using System.Reflection;
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using Microsoft.Data.SqlClient;
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namespace ZB.MOM.WW.ScadaBridge.AuditLog.Tests.TestSupport;
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/// <summary>
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/// Fabricates a <see cref="SqlException"/> with a given error number via the driver's internal
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/// <c>CreateException</c> factory (the type has no public constructor) — same technique as
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/// ExternalSystemGateway.Tests' <c>FabricateSqlException</c>.
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/// </summary>
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internal static class SqlExceptionFactory
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{
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/// <summary>Creates a <see cref="SqlException"/> carrying one error with <paramref name="number"/>.</summary>
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/// <param name="number">The SQL Server error number.</param>
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/// <param name="message">The error message.</param>
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/// <returns>The fabricated exception.</returns>
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public static SqlException Create(int number, string message = "simulated")
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{
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var errorCtor = typeof(SqlError).GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic)
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.First(c => c.GetParameters().Length == 8 && c.GetParameters()[7].ParameterType == typeof(Exception));
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var sqlError = (SqlError)errorCtor.Invoke(
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new object?[] { number, (byte)0, (byte)0, "server", message, "procedure", 0, null });
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var collection = (SqlErrorCollection)typeof(SqlErrorCollection)
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.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic).First()
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.Invoke(Array.Empty<object?>());
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typeof(SqlErrorCollection).GetMethod("Add", BindingFlags.Instance | BindingFlags.NonPublic)!
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.Invoke(collection, new object?[] { sqlError });
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var create = typeof(SqlException).GetMethod("CreateException",
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BindingFlags.Static | BindingFlags.NonPublic,
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new[] { typeof(SqlErrorCollection), typeof(string) })!;
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return (SqlException)create.Invoke(null, new object?[] { collection, "6.0.0" })!;
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}
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}
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