Migrating to Pester 4.0.7

Pester 4.0.7 changes the name of the "Contain" assertion. This script rewrites script files in two ways:

  1. It injects "-" before Not, Be, and so on.
  2. It replaces "Contain" with "-FileContentMatch".

As I have not used Assert-VerifiableMocks it does not replace that command at this time.