Visual indicator for string AreEqual doesn't work well for mismatches at the end of long strings

[johnthcall]

Summary

Good dehavior with enough characters at the end

Assert.AreEqual("01234567890123456789012345678901234567890123X", "01234567890123456789012345678901234567890123456789");

Assert.AreEqual failed. Expected string length 45 but was 50. 'expected' expression: '"01234567890123456789012345678901234567890123X"', 'actual' expression: '"01234567890123456789012345678901234567890123456789"'.
Expected: "...23456789012345678901234567890123X"
But was:  "...23456789012345678901234567890123456789"
----------------------------------------------^

Bad behavior with not enough characters at the end

Assert.AreEqual("01234567890123456789012345678901234567890123X", "01234567890123456789012345678901234567890123456");

 Assert.AreEqual failed. Expected string length 45 but was 47. 'expected' expression: '"01234567890123456789012345678901234567890123X"', 'actual' expression: '"01234567890123456789012345678901234567890123456"'.
 Expected: "...7890123456789012345678901234567890123X"
 But was:  "...78901234567890123456789012345678901..."
 ---------------------------------------------------^

Background and Motivation

While verifying new behavior for mismatches I noticed that I wasn't able to see the mismatch at the end of a long string.

Proposed Feature

Similar to how when there are 5 characters after the mismatch and the end of the longer string is shown it should not produce ellipsis to hide the mismatch for only 2 additional characters.

[nohwnd]

Will have a look, I thought I covered that case as well. Thanks for finding that.

[nohwnd]

Which version of MSTest are you using? On 4.0.0 I see it work correctly using your example.

<!-- file mstest296.csproj -->
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
    <LangVersion>latest</LangVersion>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="MSTest" Version="4.0.0" />
  </ItemGroup>

  <ItemGroup>
    <Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
  </ItemGroup>

</Project>

// file Test1.cs
namespace mstest296;

[TestClass]
public sealed class Test1
{
    [TestMethod]
    public void TestMethod1()
    {
        Assert.AreEqual("01234567890123456789012345678901234567890123X", "01234567890123456789012345678901234567890123456789");

    }
}

[nohwnd]

I am using the working example, that is why it works. duh.