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
36 lines
1.0 KiB
JavaScript
36 lines
1.0 KiB
JavaScript
const {isEmpty} = require('./_30s.js');
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test('isEmpty is a Function', () => {
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expect(isEmpty).toBeInstanceOf(Function);
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});
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test('Returns true for empty Map', () => {
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expect(isEmpty(new Map())).toBeTruthy();
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});
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test('Returns true for empty Set', () => {
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expect(isEmpty(new Set())).toBeTruthy();
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});
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test('Returns true for empty array', () => {
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expect(isEmpty([])).toBeTruthy();
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});
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test('Returns true for empty object', () => {
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expect(isEmpty({})).toBeTruthy();
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});
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test('Returns true for empty string', () => {
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expect(isEmpty('')).toBeTruthy();
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});
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test('Returns false for non-empty array', () => {
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expect(isEmpty([1, 2])).toBeFalsy();
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});
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test('Returns false for non-empty object', () => {
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expect(isEmpty({ a: 1, b: 2 })).toBeFalsy();
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});
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test('Returns false for non-empty string', () => {
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expect(isEmpty('text')).toBeFalsy();
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});
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test('Returns true - type is not considered a collection', () => {
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expect(isEmpty(123)).toBeTruthy();
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});
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test('Returns true - type is not considered a collection', () => {
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expect(isEmpty(true)).toBeTruthy();
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});
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