60 lines
1.8 KiB
JavaScript
60 lines
1.8 KiB
JavaScript
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import { encode, decode } from './run-length-encoding';
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describe('run-length encode a string', () => {
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test('encode empty string', () => {
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expect(encode('')).toEqual('');
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});
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test('single characters only are encoded without count', () => {
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expect(encode('XYZ')).toEqual('XYZ');
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});
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test('encode string with no single characters', () => {
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expect(encode('AABBBCCCC')).toEqual('2A3B4C');
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});
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test('encode string with single characters mixed with repeated characters', () => {
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expect(encode('WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB')).toEqual('12WB12W3B24WB');
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});
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test('encode string with multiple whitespaces', () => {
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expect(encode(' hsqq qww ')).toEqual('2 hs2q q2w2 ');
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});
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test('encode string with lowercase characters', () => {
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expect(encode('aabbbcccc')).toEqual('2a3b4c');
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});
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});
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describe('run-length decode a string', () => {
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test('decode empty string', () => {
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expect(decode('')).toEqual('');
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});
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test('decode string with single characters only', () => {
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expect(decode('XYZ')).toEqual('XYZ');
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});
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test('decode string with no single characters', () => {
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expect(decode('2A3B4C')).toEqual('AABBBCCCC');
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});
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test('decode string with single characters mixed with repeated characters', () => {
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expect(decode('12WB12W3B24WB')).toEqual('WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB');
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});
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test('decode string with multiple whitespaces', () => {
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expect(decode('2 hs2q q2w2 ')).toEqual(' hsqq qww ');
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});
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test('decode string with lowercase characters', () => {
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expect(decode('2a3b4c')).toEqual('aabbbcccc');
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});
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});
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describe('run-length encode and then decode', () => {
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test('encode followed by decode gives original string', () => {
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expect(decode(encode('zzz ZZ zZ'))).toEqual('zzz ZZ zZ');
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});
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});
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