Files
mxaccessgw/clients/dotnet/MxGateway.Client.Tests/RpcExceptionMapperTests.cs
T
Joseph Doherty 8023eccfa6 Resolve Client.Dotnet-001, -002, -003 code-review findings
Client.Dotnet-001: MapRpcException typed only Unauthenticated and
PermissionDenied; every other gRPC status collapsed to an untyped exception
with the status code discarded. Added a nullable StatusCode to
MxGatewayException, extracted the duplicated mappers into a shared
RpcExceptionMapper that records the code for every status, and documented it.

Client.Dotnet-002: the production retry branch (MxGatewayException wrapping
RpcException) was never exercised. FakeGatewayTransport gained a
MapTransportExceptions mode that runs thrown RpcExceptions through
RpcExceptionMapper exactly as the production transport does.

Client.Dotnet-003: MxGatewaySession.DisposeAsync disposed _closeLock while a
concurrent CloseAsync could be parked in WaitAsync. DisposeAsync now drains
in-flight CloseAsync callers before disposing the semaphore; the client's
_disposed flag is accessed via Interlocked.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-18 21:31:33 -04:00

77 lines
3.0 KiB
C#

using Grpc.Core;
namespace MxGateway.Client.Tests;
/// <summary>Tests for the shared gRPC-to-native exception mapping used by the transports.</summary>
public sealed class RpcExceptionMapperTests
{
/// <summary>Verifies that an unauthenticated status maps to the authentication exception.</summary>
[Fact]
public void Map_UnauthenticatedStatus_ProducesAuthenticationException()
{
RpcException rpc = new(new Status(StatusCode.Unauthenticated, "no key"));
Exception mapped = RpcExceptionMapper.Map(rpc, CancellationToken.None);
MxGatewayAuthenticationException authentication =
Assert.IsType<MxGatewayAuthenticationException>(mapped);
Assert.Equal(StatusCode.Unauthenticated, authentication.StatusCode);
}
/// <summary>Verifies that a permission-denied status maps to the authorization exception.</summary>
[Fact]
public void Map_PermissionDeniedStatus_ProducesAuthorizationException()
{
RpcException rpc = new(new Status(StatusCode.PermissionDenied, "missing scope"));
Exception mapped = RpcExceptionMapper.Map(rpc, CancellationToken.None);
MxGatewayAuthorizationException authorization =
Assert.IsType<MxGatewayAuthorizationException>(mapped);
Assert.Equal(StatusCode.PermissionDenied, authorization.StatusCode);
}
/// <summary>Verifies that a cancelled status maps to OperationCanceledException.</summary>
[Fact]
public void Map_CancelledStatus_ProducesOperationCanceledException()
{
RpcException rpc = new(new Status(StatusCode.Cancelled, "cancelled"));
Exception mapped = RpcExceptionMapper.Map(rpc, CancellationToken.None);
Assert.IsType<OperationCanceledException>(mapped);
}
/// <summary>
/// Verifies that non-auth statuses surface the originating gRPC status code on the
/// mapped exception so callers can distinguish transient from permanent failures
/// without reflecting into InnerException.
/// </summary>
[Theory]
[InlineData(StatusCode.NotFound)]
[InlineData(StatusCode.InvalidArgument)]
[InlineData(StatusCode.ResourceExhausted)]
[InlineData(StatusCode.FailedPrecondition)]
[InlineData(StatusCode.Unavailable)]
[InlineData(StatusCode.Internal)]
public void Map_NonAuthStatus_CarriesStatusCodeOnMxGatewayException(StatusCode statusCode)
{
RpcException rpc = new(new Status(statusCode, "boom"));
Exception mapped = RpcExceptionMapper.Map(rpc, CancellationToken.None);
MxGatewayException gatewayException = Assert.IsType<MxGatewayException>(mapped);
Assert.Equal(statusCode, gatewayException.StatusCode);
Assert.Same(rpc, gatewayException.InnerException);
}
/// <summary>Verifies that an MxGatewayException built without a gRPC status reports a null StatusCode.</summary>
[Fact]
public void StatusCode_IsNull_WhenNoGrpcStatusProvided()
{
MxGatewayException gatewayException = new("plain failure");
Assert.Null(gatewayException.StatusCode);
}
}