How in jest to test a method in a class that is called by condition?

Question

JavaScript

Example there is a method in a class

sliderInit() {
    if (this.state.showInterval) {
      this.intervalExpose()
    }}

how can i test intervalExpose if it is called by condition

Answer 1

Initialize class object with condition included?

Answer 2

test it separately.
If you are sliderInittesting then spy/mock the intervalExpose and seemock.calls