Assert.AreEqual string: consider displaying the full actual and expected in addition to the diff

[Evangelink]

Summary

Let's take the following error diff:

Assert.AreEqual failed. Expected string length 199 but was 139. 'expected' expression: 'Normalize(expected)', 'actual' expression: 'Normalize(actual)'.
Expected: "...n 1; }␊    #endregion␊␊    #region ..."
But was:  "...n 1; }␊    #endregion␊    #endregion␊}"

This is nice for spotting the exact difference but it's sometimes interesting to have access to the full context.

For examples:

1. When you are in a scenario where you are changing the output, it's useful to be able to copy the new expected content to replace current expected.

2. When there are more than one issue, you would need to run the assert multiple times when having the full actual/expected might allow you to do an extra check upfront.

[nohwnd]

I would love to see this solved by showing actual diff in the commandline and in UI.

In commandline by using tool similar to diffplex, or as diff from git, or something similar.

that gives us not only the whole text, but also multiple locations of where the difference is found, similarities etc.

I can see that as great value added especially for the outuput tests you mention, because pasting it in diff tool is exactly what I end up doing manually.