Download: brew install ifacemaker or go install github.com/vburenin/ifacemaker@latest

• Creates interface for some impelentation. now when you add some method, just run go generate ./... and your interface is up to date

1. Create implementation for your interface
2. generate interface using ifacemaker

• command: ifacemaker -f <file> -o <interface_filename> -i <inteface_name> -s <struct_name> -p <package_name>

• Example

Download: go install golang.org/x/tools/cmd/stringer@latest

• Stringer makes your type suitable for fmt.Stringer interface

1. create enum for type
2. generate String method for type

• command: stringer -type=<typename> <filename>

• Example

Download: go install go.uber.org/mock/mockgen@latest

• mockgen allows you to isolate unit of code you are testing by replacing dependencies with contolled substitutes

1. Select interface for mocking
2. Mock the interface

• command: mockgen -source=<filename> -destination=<filename> -package=<pkgname>

• Example