16 lines
426 B
JavaScript
16 lines
426 B
JavaScript
const expect = require('expect');
|
|
const {isNumber} = require('./_30s.js');
|
|
|
|
test('isNumber is a Function', () => {
|
|
expect(isNumber).toBeInstanceOf(Function);
|
|
});
|
|
test('passed argument is a number', () => {
|
|
expect(isNumber(1)).toBeTruthy();
|
|
});
|
|
test('passed argument is not a number', () => {
|
|
expect(isNumber('1')).toBeFalsy();
|
|
});
|
|
test('passed argument is not a number', () => {
|
|
expect(isNumber(NaN)).toBeFalsy();
|
|
});
|