我有如下函数:
function checkforLandP(n){
if(n[0]=== '£' && n[n.length-1] === 'p'){
// remove the p
n =n.slice(0, -1);
// remove the £
n = n.substr(1);
// take the value and multiply by 100
n =Math.round(n*100);
if(isNaN(n)){
window.alert('Please enter a valid number');
throw ('Please enter a valid number');
}
}
return n;
};
并且以下测试:
describe("check for £ and p", function(){
it("checks the array for £ and p together", function(){
expect(checkforLandP('£234p')).toBe(23400);
expect(checkforLandP(234)).toBe(234);
expect(checkforLandP('asdfsdf')).toBe('asdfsdf');
expect(checkforLandP('£asdfsdfp')).toThrow("Please enter a valid number");
});
});
测试失败并返回:请输入有效的数字
我已经尝试了语法,几乎所有东西都没问题。