TeamCity.VSTest.TestLogger/TestNameProvider.cs

// ReSharper disable ClassNeverInstantiated.Global
// ReSharper disable InvertIf
// ReSharper disable ConvertIfStatementToReturnStatement
namespace TeamCity.VSTest.TestLogger;

using System;

internal class TestNameProvider : ITestNameProvider
{
    public string GetTestName(string? fullyQualifiedName, string? displayName)
    {
        fullyQualifiedName = fullyQualifiedName?.Trim() ?? string.Empty;
        displayName = displayName?.Trim() ?? string.Empty;

        if (fullyQualifiedName == string.Empty)
        {
            return displayName;
        }
            
        if (displayName == string.Empty)
        {
            return fullyQualifiedName;
        }

        if (!fullyQualifiedName.Contains(displayName))
        {
            return fullyQualifiedName + GetArgs(displayName);
        }

        return fullyQualifiedName.Length > displayName.Length ? fullyQualifiedName : displayName;
    }

    private static string GetArgs(string name)
    {
        var typedArgsPosition = name.IndexOf("<", StringComparison.Ordinal);
        var hasTypes = typedArgsPosition >= 0;
        var argsPosition = name.IndexOf("(", StringComparison.Ordinal);
        var hasArgs = argsPosition >= 0;
        if (!hasArgs && !hasTypes)
        {
            return string.Empty;
        }

        if (!hasArgs || hasTypes && typedArgsPosition < argsPosition)
        {
            argsPosition = typedArgsPosition;
        }

        name = name.Substring(argsPosition, name.Length - argsPosition).Trim();
        if (hasArgs && !name.EndsWith(")"))
        {
            name += ")";
        }
            
        return name;
    }
}