javascript - Mocking the same function in two different test blocks in Jest -

i've got question creating mocks of functions in jest. i've got 2 elements on page call different functions in react component. both of functions call same function, passed in props, onfieldchanged. want simulate change on these 2 elements, , confirm props.onfieldchanged called.

when write first test (the first test below), passes flying colors. when write second test, second test passes first test fails. basically, cannot both tests pass @ same time. need reset mock somehow? know how this?

what gives?

  describe('user selects checkbox', () => {     props.onfieldchanged = jest.fn();     const wrapper = shallow(<dateoptions {...props} />);     it('calls onfieldchanged function', () => {       const element = wrapper.find('#addonetostudydays');       element.simulate('change');       expect(props.onfieldchanged).tohavebeencalled();     });   });    describe('user types in input', () => {     props.onfieldchanged = jest.fn();     const wrapper = shallow(<dateoptions {...props} />);     it('calls onfieldchanged function', () => {       const element = wrapper.find('#lowertimelimit');       element.simulate('change');       expect(props.onfieldchanged).tohavebeencalled();     });   }); 

try pass jest.fn() different variable:

  describe('user selects checkbox', () => {     it('calls onfieldchanged function', () => {       const onfieldchanged = jest.fn();       const wrapper = shallow(<dateoptions {...props, onfieldchanged} />);       const element = wrapper.find('#addonetostudydays');       element.simulate('change');       expect(props.onfieldchanged).tohavebeencalled();     });   });    describe('user types in input', () => {     it('calls onfieldchanged function', () => {       const onfieldchanged = jest.fn();       const wrapper = shallow(<dateoptions {...props, onfieldchanged} />);       const element = wrapper.find('#lowertimelimit');       element.simulate('change');       expect(props.onfieldchanged).tohavebeencalled();     });   });