23 lines
520 B
JavaScript
23 lines
520 B
JavaScript
const expect = require('expect');
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const Blob = class{
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constructor(s) {
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return {
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size: Buffer.byteLength(s.toString())
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};
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}
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};
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const byteSize = str => new Blob([str]).size;
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test('byteSize is a Function', () => {
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expect(byteSize).toBeInstanceOf(Function);
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});
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test('Works for a single letter', () => {
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expect(byteSize('a')).toBe(1);
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});
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test('Works for a common string', () => {
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expect(byteSize('Hello World')).toBe(11);
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});
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test('Works for emoji', () => {
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expect(byteSize('😀')).toBe(4);
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});
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