How can I write unit test for "is" keyword condition in C#

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C#

public class BaseHeaderRequest
{
    public string MarketId { get; set; }
    public string StoreId { get; set; }
    public string DataVersion { get; set; }
    public string AcceptLanguage { get; set; }

    public override bool Equals(object obj) =>
        obj is BaseHeaderRequest headers && //This line showing red in Sonarqube. Partially covered by tests(5 of 6 conditions)
        MarketId == headers.MarketId &&
        StoreId == headers.StoreId &&
        AcceptLanguage == headers.AcceptLanguage;

    public override int GetHashCode() =>
        HashCode.Combine(MarketId, StoreId, AcceptLanguage);
}

What I have tried:

I have written few tests to cover the null object compare, different object compare, same type objects with different data.

Posted 27-Mar-23 17:15pm

Virendra S from Bangalore, Karnataka

Updated 5-Apr-23 20:07pm

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Comments

Chris Copeland 28-Mar-23 4:40am

What exactly is Sonarqube saying? Is it saying that the condition isn't always tested? If so, you might need to consider writing a unit test that covers false values. Ie. pass in a null into the method, and also pass an object that isn't an instance of BaseHeaderRequest.

Virendra S from Bangalore, Karnataka 28-Mar-23 5:13am

Yes, it is saying that always the condition is not tested. already wrote few tests cases to cover this scenario.

[Fact]
public void Equals_WithNull_ShouldReturnFalse()
{
// Arrange
var headers = new BaseHeaderRequest();

// Act
var result = headers.Equals(null);

// Assert
result.Should().BeFalse();
}

[Fact]
public void EqualsShouldReturnFalseWhenDifferentObjectComparedWithBaseHeaderRequestObject()
{
//Arrange
var someObj = new List<string>();
var objBaseHeaderRequest = new BaseHeaderRequest();

//Act
var result = objBaseHeaderRequest.Equals(someObj);

//Assert
result.Should().BeFalse();
}

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mtoha · Answer 1 · 2023-04-05T20:07:00

C#

var object1 = new BaseHeaderRequest();
object1.MarketId = "MarketIdAbc";
object1.StoreId = "10986586";
object1.AcceptLanguage = "en";

string sJson = JsonConvert.SerializeObject(object1);
var object2 = JsonConvert.DeserializeObject<BaseHeaderRequest>(sJson);
Assert.IsTrue(object1.equals(object2));

You should make instance of BaseHeaderRequest and make equals both values at MarketId, StoreId, and AcceptLanguage