/// import mockery = require('mockery'); mockery.enable(); mockery.enable({}); mockery.enable({ useCleanCache: true, warnOnReplace: true, warnOnUnregistered: true }); mockery.disable(); var fsMock = { stat: (path: any, cb: any) => { /* your mock code */ } }; mockery.registerMock('fs', fsMock); mockery.deregisterMock('fs'); mockery.registerSubstitute('fs', 'fs-mock'); mockery.deregisterSubstitute('fs'); mockery.registerAllowable('./my-source-under-test'); mockery.registerAllowable('./my-source-under-test', true); mockery.deregisterAllowable('./my-source-under-test'); mockery.registerAllowables(['async', 'path', 'util']); mockery.deregisterAllowables(['async', 'path', 'util']); mockery.deregisterAll(); mockery.resetCache(); mockery.warnOnUnregistered(false); mockery.warnOnReplace(false);