Reactjs useStyles（）不包含在jest中？

我已经为一个组件编写了单元测试用例。所有测试都通过了，但是代码覆盖范围中的jest并没有涵盖useStyles和Prop。这是我的组件代码

const AssignmentDate = (props: any) => {
    const classes = useStyles();
    const { handleMUIDate , receivedDate } = props;

    
    return (
        <MuiPickersUtilsProvider utils={DateFnsUtils}>
            <Grid container  className={classes.fromdateclass}>
                <KeyboardDatePicker
                    disableToolbar
                    variant="inline"
                    format="MM/dd/yyyy"
                    margin="normal"
                    id="date-picker-inline"
                    value={receivedDate}
                    onChange={handleMUIDate}
                    KeyboardButtonProps={{
                        'aria-label': 'change date',
                    }}
                />

            </Grid>
        </MuiPickersUtilsProvider>
    );
}

这两个测试用例都通过了，但是仍然没有涵盖props&useStyles（）。有人能帮我吗

it('should render an MuiPickersUtilsProvider component', () => {
    const assignmentDate = shallow(<AssignmentDate {...mockProps} />);
    const muipickerutils = assignmentDate.find(MuiPickersUtilsProvider);
    expect(muipickerutils).toHaveLength(1);
    assignmentDate.unmount();
  });

  it('should render an MuiPickersUtilsProvider component', () => {
    const assignmentDate = shallow(<AssignmentDate {...mockProps} />);
    const keyboardDatePicker = assignmentDate.find(KeyboardDatePicker);
    expect(keyboardDatePicker).toHaveLength(1);
    assignmentDate.unmount();
  });

const mockProps = {
    handleMUIDate: jest.fn(() => {}),
    receivedDate: "Thu Oct 15 2020 10:44:49 GMT+0530 (India Standard Time)"
  };