83a6a6ea32
* chore: make aware eslint that we use jest By setting up the jest environment, we no longer need to declare the 'test' global in the configuration. * chore: don't need to import expect, it's a jest environment global * chore: don't need to import expect when creating undefined test
54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
JavaScript
const {is} = require('./_30s.js');
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test('is is a Function', () => {
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expect(is).toBeInstanceOf(Function);
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});
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test('Works for arrays with data', () => {
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expect(is(Array, [1])).toBeTruthy();
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});
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test('Works for empty arrays', () => {
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expect(is(Array, [])).toBeTruthy();
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});
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test('Works for arrays, not objects', () => {
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expect(is(Array, {})).toBeFalsy();
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});
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test('Works for objects', () => {
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expect(is(Object, {})).toBeTruthy();
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});
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test('Works for maps', () => {
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expect(is(Map, new Map())).toBeTruthy();
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});
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test('Works for regular expressions', () => {
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expect(is(RegExp, /./g)).toBeTruthy();
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});
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test('Works for sets', () => {
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expect(is(Set, new Set())).toBeTruthy();
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});
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test('Works for weak maps', () => {
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expect(is(WeakMap, new WeakMap())).toBeTruthy();
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});
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test('Works for weak sets', () => {
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expect(is(WeakSet, new WeakSet())).toBeTruthy();
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});
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test('Works for strings - returns true for primitive', () => {
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expect(is(String, '')).toBeTruthy();
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});
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test('Works for strings - returns true when using constructor', () => {
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expect(is(String, new String(''))).toBeTruthy();
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});
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test('Works for numbers - returns true for primitive', () => {
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expect(is(Number, 1)).toBeTruthy();
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});
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test('Works for numbers - returns true when using constructor', () => {
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expect(is(Number, new Number('10'))).toBeTruthy();
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});
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test('Works for booleans - returns true for primitive', () => {
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expect(is(Boolean, false)).toBeTruthy();
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});
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test('Works for booleans - returns true when using constructor', () => {
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expect(is(Boolean, new Boolean(false))).toBeTruthy();
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});
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test('Works for functions', () => {
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expect(is(Function, () => null)).toBeTruthy();
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});
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