CODEWITHSUNDEEP
f#nunit
Sanjay Kumar
Sanjay Kumar

Reputation: 59

F#- How to use Assert.Multiple with F#

I am running a few NUnit tests and want my each test case to run all assertions till the end of the block before quitting even if there are few assertion failures. I see that there is Assert.Multiple (https://github.com/nunit/docs/wiki/Multiple-Asserts) which can serve that purpose but I am getting an error:

No overloads match for method 'Multiple'. The available overloads are shown below. Possible overload: 'Assert.Multiple(testDelegate: TestDelegate) : unit'. Type constraint mismatch. The type 'unit' is not compatible with type 'TestDelegate' . Possible overload: 'Assert.Multiple(testDelegate: AsyncTestDelegate) : unit'. Type constraint mismatch. The type 'unit' is not compatible with type 'AsyncTestDelegate' . Done building target "CoreCompile" in project "NUnitTestProject1.fsproj" -- FAILED.

If I have my test like:

 [<Test>]
let getResponseCode () =
    let response = Request.createUrl Post "https://reqres.in/api/users"
                |> Request.setHeader (ContentType (ContentType.create("application", "json")))
                |> Request.bodyString """{ 
    "name": "morpheus",
    "job": "leader"}"""

                |> HttpFs.Client.getResponse
                |> run

     Assert.Multiple(() =>

                Assert.AreEqual(200,response.statusCode)
                Assert.AreEqual(215,response.contentLength)
            )

How should I write it so that it should not give me an error on using Assert.Multiple? Thanks in advance.

Check the screenshot of an error here:

Upvotes: 2

Views: 408

Answers (1)

bruinbrown
bruinbrown

Reputation: 1006

You need to use a lambda in here. The syntax you've used there is the C# syntax for a lambda, in F# the syntax is fun () -> ..., so in your case it will look like

Assert.Multiple(fun () ->
    Assert.AreEqual(200, response.StatusCode)
    Assert.AreEqual(215, response.ContentLength)
)

Upvotes: 5

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