Collection initializer code coverage

SonarQube Cloud
,
1

Environment:

  • ALM: Azure DevOps
  • CI system: Azure DevOps
  • Language: C# 8.0

I have a class with field collection initializers. Sonarcloud reports that the collection initializer lines are ‘Not covered by tests’.

Please recommend how to resolve this.

Sample code:

public enum ThingStatus
{
	StatusAlpha,
	StatusBeta
}
public static class ThingStatusDescription
{
	public const string StatusAlpha = "Description 1.";
	public const string StatusBeta = "Description 2.";

	private static readonly Dictionary<string, string> _statusToDescription = new Dictionary<string, string>
	{
		/* *** The following 2 lines are marked as NOT COVERED BY TESTS *** */
		{ ThingStatus.StatusAlpha.ToString(), ThingStatusDescription.StatusAlpha },
		{ ThingStatus.StatusBeta.ToString(), ThingStatusDescription.StatusBeta }
	};
	
	public static string GetDescription(string status)
	{
		if (string.IsNullOrWhiteSpace(status))
		{
			return null;
		}
		_statusToDescription.TryGetValue(status, out var description);
		return description;
	}
}
2

Hi,

Welcome to the community!

Do you have unit tests that cover those lines?

 
Ann

3

Hi Ann,
We have unit tests covering all expected GetDescription outputs. These touch all elements in the dictionary.
We do not have explicit tests covering the dictionary constructor. I don’t know how to test this collection initializer directly. Will be grateful for suggestions please!

4

Hey @s708

SonarQube isn’t involved in the generation of coverage reports, it only takes in the information of a report generated by another tool. I would suggest:

  • Checking the raw report you are importing into SonarCloud to see if indeed, coverage is reported as missing for these lines
  • Ask around C# developer communities / the community for your specific coverage tool for advice around whether these lines can actually be covered by tests
5

Makes sense. Thank you.