TestHelpers.DiffAssertions (nuget): A simple diff comparison asserter that makes it easy to assert if two texts (strings) are equal, and display the differences in a diff tool if they are not. Simply put it is a much simpler (and dumber) version of ApprovalTests that should get the job done for simple scenarios. You can easily create a file that contains the expected result (your specification or example) and then compare the contents of the file with the actual value that is produced during the test.
Keywords: Assert|Assertion|Equal|Equals|Diff|Compare|Verify|Verification|Approval|Example|Specification