GrpcAssertions.TUnit 0.1.0

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package GrpcAssertions.TUnit --version 0.1.0
                    


                    

                
NuGet\Install-Package GrpcAssertions.TUnit -Version 0.1.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="GrpcAssertions.TUnit" Version="0.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="GrpcAssertions.TUnit" Version="0.1.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="GrpcAssertions.TUnit" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add GrpcAssertions.TUnit --version 0.1.0
                    


                    

                
#r "nuget: GrpcAssertions.TUnit, 0.1.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package GrpcAssertions.TUnit@0.1.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=GrpcAssertions.TUnit&version=0.1.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=GrpcAssertions.TUnit&version=0.1.0
                    


                            Install as a Cake Tool

GrpcAssertions.TUnit

NuGet License: MIT .NET

Scope: Test projects only. Not intended for production code.

TUnit-native gRPC assertions for .NET tests. Fluent entry points over TUnit's Assert.That(...) pipeline for asserting on gRPC call outcomes. AOT-compatible, trimmable, no runtime reflection in the assertion path.

What ships

Delegate assertions on Assert.That(() => client.Method(...)):

Entry point Behaviour
ThrowsGrpcException() / ThrowsGrpcException(StatusCode) Asserts the call throws an RpcException (optionally with a status). Returns a chain.
DoesNotThrowGrpcException() Asserts the call completes without throwing an RpcException.
IsRpcException() (on a caught Exception) Asserts the exception is a gRPC RpcException.

Chain off ThrowsGrpcException(): 14 StatusCode shorthands (IsUnavailable(), IsNotFound(), and the rest), plus WithDetail(string) and WithDetailContaining(string, StringComparison).

The framework-agnostic core (GrpcAssertions) also ships the GrpcCallBuilder test-double helper for building AsyncUnaryCall<T> fakes.

Install

dotnet add package GrpcAssertions.TUnit

Requirements: TUnit 1.48.6 or later, .NET 10. The framework-agnostic GrpcAssertions core and its Grpc.Core.Api dependency come transitively.

Quick start

await Assert.That(() => client.PredictAsync(request, ct))
    .ThrowsGrpcException(StatusCode.Unavailable)
    .WithDetailContaining("connection refused", StringComparison.Ordinal);

await Assert.That(() => client.ClosePickCycleAsync(request, ct))
    .DoesNotThrowGrpcException();

The full reference, including the GrpcCallBuilder test doubles and the complete shorthand list, is in the GitHub README.

License

MIT. Depends transitively on Grpc.Core.Api (Apache-2.0).

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last Updated
0.1.0 0 6/2/2026
0.0.1 65 6/1/2026

View the rendered release notes: https://github.com/JohnVerheij/GrpcAssertions.TUnit/releases/tag/v0.1.0

Feature release. Lifts the package from skeleton to functional: the gRPC outcome-assertion surface ships. `ThrowsGrpcException()` asserts a delegate threw an `RpcException`, with `StatusCode` shorthands and `Status.Detail` refinements; `DoesNotThrowGrpcException()` covers the benign-error swallow tests; and `GrpcCallBuilder` removes the five-parameter `AsyncUnaryCall<T>` constructor that every hand-rolled gRPC fake repeats. The v0.0.1 `IsRpcException()` discriminator is preserved unchanged.

### Added

- **`Assert.That(() => call).ThrowsGrpcException()`** asserts the delegate throws a gRPC `RpcException` of any status; **`ThrowsGrpcException(StatusCode expected)`** asserts the status. Both return a `GrpcExceptionAssertion` chain, and failure messages render the actual `StatusCode` and `Status.Detail`. The entry points extend the delegate assertion source produced by `Assert.That(() => client.Method(...))`.
- **14 `StatusCode` shorthands** chaining off `ThrowsGrpcException()`: `IsOk`, `IsCancelled`, `IsInvalidArgument`, `IsDeadlineExceeded`, `IsNotFound`, `IsAlreadyExists`, `IsPermissionDenied`, `IsResourceExhausted`, `IsFailedPrecondition`, `IsAborted`, `IsUnimplemented`, `IsInternal`, `IsUnavailable`, `IsUnauthenticated`.
- **`WithDetail(string)`** (exact, ordinal) and **`WithDetailContaining(string, StringComparison)`** (substring, explicit comparison per the family convention) refine the assertion on `Status.Detail`.
- **`Assert.That(() => call).DoesNotThrowGrpcException()`** asserts the delegate completes without throwing an `RpcException`. A thrown `RpcException` fails with the gRPC outcome rendered; any other thrown exception fails naming its type and message.
- **`GrpcCallBuilder`** (core `GrpcAssertions` package): `Success<T>(T)`, `Faulted<T>(RpcException)`, and `Faulted<T>(StatusCode, string?)` build `AsyncUnaryCall<T>` instances for gRPC client test doubles, replacing the repeated five-parameter constructor. Both builders guard their arguments with `ArgumentNullException.ThrowIfNull`, a strict improvement over the hand-rolled fakes that would dereference-null later.
- **`GrpcOutcomeRendering`** (core): `Describe(RpcException)` and `DescribeStatus(StatusCode, string?)` render the status and detail (truncated at `MaxDetailLength`, 200 characters, with a horizontal-ellipsis suffix) for failure messages, shared so consumer-authored gRPC assertions produce identical diagnostics.

### Changed

- Pinned `PackageValidationBaselineVersion` to `0.0.1` on both packages; ApiCompat strict-mode now validates v0.1.0 against the v0.0.1 baseline at pack time. The v0.1.0 additions are purely additive (no breaking changes); strict-mode records the new public types as additive baseline suppressions (`CP0001`) in `CompatibilitySuppressions.xml`.
- Exempted `VSTHRD003` in test projects (`.editorconfig`). Tests routinely await Tasks created elsewhere (for example `AsyncUnaryCall<T>.ResponseAsync` from `GrpcCallBuilder`), which is safe under the no-`SynchronizationContext` test runner; the analyzer guards against a UI-thread deadlock that cannot occur here.