refactor(api.tests): check for correct status code first in assertion

tests/FiscalOS.API.Tests/Assertions/HttpResponseMessageAssertions.cs

@@ -78,12 +78,6 @@ internal sealed class HttpResponseMessageAssertions(
 
   private async Task<T> ValidateAndDeserialize<T>(HttpStatusCode expectedStatusCode) where T : ProblemDetails
   {
-    _chain.ForCondition(Subject.Content.Headers.ContentType?.MediaType is "application/problem+json")
-      .FailWith(
-        "Expected response to be application/problem+json, but found {0}",
-        Subject.Content.Headers.ContentType?.MediaType
-      );
-
     _chain.ForCondition(Subject.StatusCode == expectedStatusCode)
       .FailWith(
         "Expected response status code to be {0}, but found {1}",
@@ -91,6 +85,12 @@ internal sealed class HttpResponseMessageAssertions(
         Subject.StatusCode
       );
 
+    _chain.ForCondition(Subject.Content.Headers.ContentType?.MediaType is "application/problem+json")
+      .FailWith(
+        "Expected response to be application/problem+json, but found {0}",
+        Subject.Content.Headers.ContentType?.MediaType
+      );
+
     var problem = await Subject.Content.ReadFromJsonAsync<T>();
 
     _chain.ForCondition(problem is not null)