41 lines
1.3 KiB
TypeScript
41 lines
1.3 KiB
TypeScript
import { expect } from 'chai';
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import { leftPad, trim } from '../../src/String';
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const TEST_SHORT = 'hello';
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const TEST_LONG = 'hello world';
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describe('left pad helper', async () => {
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it('should prepend padding', async () => {
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expect(leftPad('test')).to.equal('0000test');
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});
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it('should return long strings as-is', async () => {
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const long = 'testing-words';
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expect(leftPad(long, 8)).to.equal(long);
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});
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it('should use padding string', async () => {
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expect(leftPad('test', 8, 'too')).to.equal('toottest', 'must repeat and truncate the padding string');
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});
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});
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describe('trim helper', async () => {
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it('should return strings shorter than max', async () => {
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expect(trim('yes', 5)).to.equal('yes', 'shorter than max');
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expect(trim(TEST_SHORT, 5)).to.equal(TEST_SHORT, 'equal to max');
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});
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it('should trim strings longer than max', async () => {
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expect(trim(TEST_LONG, 3, '...')).to.equal('...');
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expect(trim(TEST_LONG, 5)).to.equal('he...');
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expect(trim(TEST_LONG, 8)).to.equal('hello...');
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});
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it('should not add tail when max is small', async () => {
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expect(trim(TEST_SHORT, 2, '...')).to.equal('he');
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expect(trim(TEST_LONG, 5, 'very long tail')).to.equal(TEST_SHORT);
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expect(trim(TEST_SHORT, 8, 'very long tail')).to.equal(TEST_SHORT);
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});
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});
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