#449 Provider state parameters are serialised as numbers, causes errors in provider state middleware when using System.Text.Json Issue created by DavidJFowler If the value of a provider state parameter is a number string, it is serialised in the pact file as a number. This is an issue if the provider state middleware in the provider tests uses System.Text.Json to deserialise a

ProviderState

value as System.Text.Json does not deserialise non-string values into string properties. https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/migrate-from-newtonsoft?pivots=dotnet-6-0#non-string-values-for-string-properties. For example:

using <http://System.Net|System.Net>;
using Newtonsoft.Json.Serialization;
using Newtonsoft.Json;
using PactNet;

var config = new PactConfig
{
    PactDir = Path.Join("..", "..", "..", "pacts"),
    DefaultJsonSettings = new JsonSerializerSettings
    {
        ContractResolver = new CamelCasePropertyNamesContractResolver(),

    }
};

var pact = Pact.V3("consumer", "provider", config).WithHttpInteractions();

pact.UponReceiving("A valid request")
    .Given("state with parameter", new Dictionary<string, string>() {["id"] = "10", ["name"] = "Fred"})
    .WithRequest(HttpMethod.Get, "/api/endpoint")
    .WillRespond()
    .WithStatus(HttpStatusCode.OK);

await pact.VerifyAsync(async ctx =>
{
    using var apiClient = new ApiClient(ctx.MockServerUri);

    await apiClient.TestRequestAsync();
});

public class ApiClient: IDisposable
{
    private readonly HttpClient _httpClient;

    public ApiClient(Uri baseUri)
    {
        _httpClient = new HttpClient { BaseAddress = baseUri };
    }

    public async Task TestRequestAsync()
    {
        await _httpClient.GetAsync("api/endpoint");
    }

    public void Dispose()
    {
        _httpClient.Dispose();
    }
}

generates this pact. Note that parameter "id" is serialised as

10

not

"10"

.

{
  "consumer": {
    "name": "consumer"
  },
  "interactions": [
    {
      "description": "A valid request",
      "providerStates": [
        {
          "name": "state with parameter",
          "params": {
            "id": 10,
            "name": "Fred"
          }
        }
      ],
      "request": {
        "method": "GET",
        "path": "/api/endpoint"
      },
      "response": {
        "status": 200
      }
    }
  ],
  "metadata": {
    "pactRust": {
      "ffi": "0.4.0",
      "models": "1.0.4"
    },
    "pactSpecification": {
      "version": "3.0.0"
    }
  },
  "provider": {
    "name": "provider"
  }
}

pact-foundation/pact-net