test: Improve assertion on an exception

Tarmil · Jul 23, 2023 · c63b207 · c63b207
1 parent 8b32663
commit c63b207
Showing 1 changed file with 4 additions and 6 deletions.
diff --git a/tests/FSharp.SystemTextJson.Tests/Test.Record.fs b/tests/FSharp.SystemTextJson.Tests/Test.Record.fs
@@ -17,12 +17,10 @@ module NonStruct =
     [<Fact>]
     let ``deserialize empty record with ignore-null-values on`` () =
         let options =
-            JsonSerializerOptions(DefaultIgnoreCondition = Serialization.JsonIgnoreCondition.WhenWritingNull)
-        try
-            JsonSerializer.Deserialize<A>("{}", options) |> ignore
-        with
-        | :? System.NullReferenceException -> failwith "Unexpected NRE."
-        | ex when ex.Message.Contains("Missing field for record type") -> () // It's expected to fail since the record requires its fields to be initialized.
+            JsonSerializerOptions(DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull)
+        let ex =
+            Assert.Throws<JsonException>(fun () -> JsonSerializer.Deserialize<A>("{}", options) |> ignore)
+        Assert.Contains("Missing field for record type", ex.Message)
 
     [<Fact>]
     let ``serialize via explicit converter`` () =