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mediawiki.deflate.test.js
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mediawiki.deflate.test.js
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QUnit.module( 'mediawiki.deflate', () => {
let seed = 1234567890;
function getPseudoRandom() {
seed = seed * 16807 % 2147483646;
return seed;
}
const longData = new TextDecoder( 'utf-8' ).decode(
Uint32Array.from(
{ length: 5 * 1024 * 1024 },
getPseudoRandom
)
);
// Decompression tests are in DeflateTest.php. Any full compression strings asserted
// here should be in the decompression test suite as well.
QUnit.test.each( 'deflate', {
foobar: {
data: 'foobar',
expected: {
chrome: 'rawdeflate,S8vPT0osAgA=',
firefox: 'rawdeflate,S8vPT0osAgA=',
pako: 'rawdeflate,S8vPT0osAgA='
}
},
Unicode: {
data: 'ℳ𝒲β™₯π“Šπ“ƒπ’Ύπ’Έβ„΄π’Ήβ„―',
expected: {
chrome: 'rawdeflate,ASQA2//ihLPwnZKy4pml8J2TivCdk4PwnZK+8J2SuOKEtPCdkrnihK8=',
firefox: 'rawdeflate,e9Sy+cPcSZsezVz6Ye7kLiBuBnL3AfGORy1bgNTORy3rAQ==',
pako: 'rawdeflate,e9Sy+cPcSZsezVz6Ye7kLiBuBnL3AfGORy1bgNTORy3rAQ=='
}
},
'Non BMP unicode': {
data: 'πŸ˜‚π…€π…π…‚π…ƒπ…„π……π…†π…‡π…ˆπ…‰π…Šπ…‹π…Œπ…π…Žπ…',
expected: {
chrome: 'rawdeflate,FcbBEUMAAADB1gmHRHDP/LR4JWTsa7t/r2RIxuT5lMwJyZKsyZa8k0+yJ9/kSM7k+gM=',
firefox: 'rawdeflate,Fca3EQAgDACx1Ukmp5KOFT0CT6E76T1OtxhY/HsECCISMgoqGjoGJtYD',
pako: 'rawdeflate,Fca3EQAgDACx1Ukmp5KOFT0CT6E76T1OtxhY/HsECCISMgoqGjoGJtYD'
}
},
'5MB data': {
data: longData,
expectedMeta: {
chrome: {
length: 273743,
head: '7NbbUlfXGQ',
tail: 'md2MlnJwE='
},
firefox: {
length: 329747,
head: '7NZds70FeR',
tail: 'InX+jkAQ=='
},
pako: {
length: 330607,
head: '7Nbbsi10mR',
tail: 'Inf9LJDw=='
}
}
}
}, async ( assert, data ) => {
const methods = [ 'pako', 'deflate', 'deflate-raw' ];
const OriginalCompressionStream = CompressionStream;
for ( const method of methods ) {
await ( async () => {
// eslint-disable-next-line qunit/no-async-in-loops
const done = assert.async();
let promise;
let platform;
switch ( method ) {
case 'pako':
platform = 'pako';
promise = Promise.resolve( mw.deflate( data.data ) );
break;
case 'deflate':
case 'deflate-raw':
if ( method === 'deflate' ) {
// Stub the CompressionStream constructor to disable deflate-raw
globalThis.CompressionStream = function ( type ) {
if ( type === 'deflate-raw' ) {
throw new Error( 'Testing deflate-raw being unavailable' );
}
// Call the original constructor for other arguments
return new OriginalCompressionStream( type );
};
sinon.spy( globalThis, 'CompressionStream' );
}
platform = $.client.profile().name;
if ( platform !== 'chrome' && platform !== 'firefox' ) {
assert.true( true, 'Unknown browser, skipping test' );
done();
return;
}
promise = mw.deflateAsync( data.data );
break;
}
return promise.then( ( deflated ) => {
if ( data.expected ) {
assert.strictEqual( deflated, data.expected[ platform ], method );
} else {
assert.strictEqual( deflated.length, data.expectedMeta[ platform ].length, 'length (' + method + ')' );
assert.strictEqual( deflated.slice( 11, 21 ), data.expectedMeta[ platform ].head, 'head (' + method + ')' );
assert.strictEqual( deflated.slice( -10 ), data.expectedMeta[ platform ].tail, 'tail (' + method + ')' );
}
done();
} ).finally( () => {
// Restore CompressionStream if it was stubbed
if ( method === 'deflate' ) {
globalThis.CompressionStream.restore();
globalThis.CompressionStream = OriginalCompressionStream;
}
} );
} )();
}
} );
} );

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