Copied! This is the same example I Utilized in an earlier portion to look at perform composition. It essentially permits substituting print() that has a tailor made purpose of the identical interface. To examine if it prints the appropriate message, You must intercept it by injecting a mocked functionality: Copied! https://eduardotxyzy.bloggip.com/31515533/the-smart-trick-of-hpe-printer-that-nobody-is-discussing