72 lines
2.6 KiB
TypeScript
72 lines
2.6 KiB
TypeScript
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// Copyright 2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { assert } from 'chai';
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import { parseIntWithFallback } from '../../util/parseIntWithFallback';
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describe('parseIntWithFallback', () => {
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describe('when passed a number argument', () => {
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it('returns the number when passed an integer', () => {
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assert.strictEqual(parseIntWithFallback(0, -1), 0);
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assert.strictEqual(parseIntWithFallback(123, -1), 123);
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assert.strictEqual(parseIntWithFallback(-123, -1), -123);
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});
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it('returns the fallback when passed a decimal value', () => {
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assert.strictEqual(parseIntWithFallback(0.2, -1), -1);
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assert.strictEqual(parseIntWithFallback(1.23, -1), -1);
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});
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it('returns the fallback when passed NaN', () => {
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assert.strictEqual(parseIntWithFallback(NaN, -1), -1);
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});
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it('returns the fallback when passed ∞', () => {
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assert.strictEqual(parseIntWithFallback(Infinity, -1), -1);
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assert.strictEqual(parseIntWithFallback(-Infinity, -1), -1);
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});
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});
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describe('when passed a string argument', () => {
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it('returns the number when passed an integer', () => {
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assert.strictEqual(parseIntWithFallback('0', -1), 0);
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assert.strictEqual(parseIntWithFallback('123', -1), 123);
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assert.strictEqual(parseIntWithFallback('-123', -1), -123);
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});
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it('parses decimal values like parseInt', () => {
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assert.strictEqual(parseIntWithFallback('0.2', -1), 0);
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assert.strictEqual(parseIntWithFallback('12.34', -1), 12);
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assert.strictEqual(parseIntWithFallback('-12.34', -1), -12);
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});
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it('parses values in base 10', () => {
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assert.strictEqual(parseIntWithFallback('0x12', -1), 0);
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});
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it('returns the fallback when passed non-parseable strings', () => {
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assert.strictEqual(parseIntWithFallback('', -1), -1);
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assert.strictEqual(parseIntWithFallback('uh 123', -1), -1);
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assert.strictEqual(parseIntWithFallback('uh oh', -1), -1);
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});
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});
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describe('when passed other arguments', () => {
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it("returns the fallback when passed arguments that aren't strings or numbers", () => {
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assert.strictEqual(parseIntWithFallback(null, -1), -1);
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assert.strictEqual(parseIntWithFallback(undefined, -1), -1);
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assert.strictEqual(parseIntWithFallback(['123'], -1), -1);
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});
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it('returns the fallback when passed a stringifiable argument, unlike parseInt', () => {
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const obj = {
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toString() {
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return '123';
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},
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};
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assert.strictEqual(parseIntWithFallback(obj, -1), -1);
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});
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});
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});
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