func()

in gomock/call.go [112:146]

• 32 lines of code
• 6 McCabe index (conditional complexity)

func (c *Call) DoAndReturn(f interface{}) *Call {
	// TODO: Check arity and types here, rather than dying badly elsewhere.
	v := reflect.ValueOf(f)

	c.addAction(func(args []interface{}) []interface{} {
		c.t.Helper()
		ft := v.Type()
		if c.methodType.NumIn() != ft.NumIn() {
			if ft.IsVariadic() {
				c.t.Fatalf("wrong number of arguments in DoAndReturn func for %T.%v The function signature must match the mocked method, a variadic function cannot be used.",
					c.receiver, c.method)
			} else {
				c.t.Fatalf("wrong number of arguments in DoAndReturn func for %T.%v: got %d, want %d [%s]",
					c.receiver, c.method, ft.NumIn(), c.methodType.NumIn(), c.origin)
			}
			return nil
		}
		vArgs := make([]reflect.Value, len(args))
		for i := 0; i < len(args); i++ {
			if args[i] != nil {
				vArgs[i] = reflect.ValueOf(args[i])
			} else {
				// Use the zero value for the arg.
				vArgs[i] = reflect.Zero(ft.In(i))
			}
		}
		vRets := v.Call(vArgs)
		rets := make([]interface{}, len(vRets))
		for i, ret := range vRets {
			rets[i] = ret.Interface()
		}
		return rets
	})
	return c
}