Compression Streams

https://bugs.webkit.org/show_bug.cgi?id=242665

Reviewed by Brent Fulgham.

This patch implements the Compression Streams API.
Currently we are passing all WPT test cases (except for an initialization one where
we are throwing a typeError instead of a standard Error).

This implementation uses the compression and decompression functions from the Zlib library.

For compression I attempt to perform the compression in one shot by allocating enough memory up front per chunk.
For decompression I am using a scaling allocation approach. We first allocate 1 page (16KB) of memory, then two, then 4 and so on...
I added a hard limit of 1GB per allocation to make sure I don't blow away all the device's memory.
For every chunk, I take all these allocations and merge them into one array.

* LayoutTests/imported/w3c/web-platform-tests/compression/META.yml: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.js: Added.
(get value):
(const.chunk.of.badChunks.promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.js: Added.
(async compressChunkList):
(const.chunkList.of.chunkLists.promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.js: Added.
(makeExpectedChunk):
(async compressMultipleChunks):
(numberOfChunks.promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.js: Added.
(async compressArrayBuffer):
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-output-length.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.js: Added.
(async compressArrayBuffer):
(test):
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-stream.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-with-detach.tentative.window-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-with-detach.tentative.window.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/compression-with-detach.tentative.window.js: Added.
(createLargeRandomInput):
(decompress):
(promise_test.async const):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.js: Added.
(get value):
(return.new.Uint8Array):
(value.new.Uint8Array):
(const.chunk.of.badChunks.promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-bad-chunks.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.js: Added.
(value.new.Int8Array.new.Uint8Array):
(value.new.Uint8Array):
(value.new.Uint8ClampedArray):
(value.new.Int16Array):
(value.new.Uint16Array):
(value.new.Int32Array):
(value.new.Uint32Array):
(value.new.Float32Array):
(value.new.Float64Array):
(const.chunk.of.bufferSourceChunksForDeflate.promise_test.async t):
(const.chunk.of.bufferSourceChunksForGzip.promise_test.async t):
(const.chunk.of.bufferSourceChunksForDeflateRaw.promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-buffersource.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.js: Added.
(test.t.new.DecompressionStream.toString):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-constructor-error.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.js: Added.
(promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-correct-input.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-corrupt-input.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-corrupt-input.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-corrupt-input.tentative.any.js: Added.
(async tryDecompress):
(corruptInput):
(of.expectations.promise_test.async const):
(of.expectations.promise_test):
(of.expectations.of.fields.of.cases.promise_test.async const):
(of.expectations.of.fields.of.cases.promise_test):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-corrupt-input.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-corrupt-input.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.js: Added.
(promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-empty-input.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.js: Added.
(async decompressArrayBuffer):
(chunkSize.promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-split-chunk.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.js: Added.
(promise_test.async t):
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.serviceworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.serviceworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.sharedworker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.sharedworker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-uint8array-output.tentative.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-with-detach.tentative.window-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-with-detach.tentative.window.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/decompression-with-detach.tentative.window.js: Added.
(async createLargeCompressedInput):
(promise_test.async const):
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness-shadowrealm.window-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness-shadowrealm.window.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness-shadowrealm.window.js: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness.https.any-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness.https.any.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness.https.any.js: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness.https.any.worker-expected.txt: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/idlharness.https.any.worker.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/resources/concatenate-stream.js: Added.
(async concatenateStream):
* LayoutTests/imported/w3c/web-platform-tests/compression/resources/w3c-import.log: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/third_party/pako/LICENSE: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/third_party/pako/README: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/third_party/pako/pako_inflate.min.js: Added.
(l):
(return.r):
(i.assign):
(i.shrinkBuf):
(a.arraySet):
(a.flattenChunks):
(r.arraySet):
(r.flattenChunks):
(i.setTyped):
(1):
(d):
(i.string2buf):
(i.buf2binstring):
(i.binstring2buf):
(i.buf2string):
(i.utf8border):
(2):
(t.exports):
(3):
(4):
(s):
(5):
(6):
(7):
(L):
(r):
(o):
(f):
(H):
(j):
(i.inflateInit):
(i.inflate):
(i.inflateEnd):
(i.inflateGetHeader):
(i.inflateSetDictionary):
(8):
(9):
(10):
(11):
(o.prototype.push):
(o.prototype.onData):
(o.prototype.onEnd):
(i.inflateRaw):
(string_appeared_here):
* LayoutTests/imported/w3c/web-platform-tests/compression/third_party/pako/w3c-import.log: Added.
* LayoutTests/imported/w3c/web-platform-tests/compression/w3c-import.log: Added.
* Source/WebCore/Modules/compression/CompressionStream.js:
(initializeCompressionStream):
* Source/WebCore/Modules/compression/CompressionStreamEncoder.cpp:
(WebCore::CompressionStreamEncoder::encode):
(WebCore::CompressionStreamEncoder::flush):
(WebCore::CompressionStreamEncoder::initialize):
(WebCore::CompressionStreamEncoder::compress):
* Source/WebCore/Modules/compression/CompressionStreamEncoder.h:
(WebCore::CompressionStreamEncoder::~CompressionStreamEncoder):
(WebCore::CompressionStreamEncoder::CompressionStreamEncoder):
* Source/WebCore/Modules/compression/DecompressionStream.js:
(initializeDecompressionStream):
* Source/WebCore/Modules/compression/DecompressionStreamDecoder.cpp:
(WebCore::DecompressionStreamDecoder::decode):
(WebCore::DecompressionStreamDecoder::flush):
(WebCore::DecompressionStreamDecoder::initialize):
(WebCore::DecompressionStreamDecoder::decompress):
* Source/WebCore/Modules/compression/DecompressionStreamDecoder.h:
(WebCore::DecompressionStreamDecoder::~DecompressionStreamDecoder):
(WebCore::DecompressionStreamDecoder::DecompressionStreamDecoder):
* Source/WebCore/Modules/compression/Formats.h:

Canonical link: https://commits.webkit.org/253093@main

LayoutTests/imported/w3c/web-platform-tests/compression/META.yml

@@ -0,0 +1,3 @@
+spec: https://wicg.github.io/compression/
+suggested_reviewers:
+  - ricea

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any-expected.txt

@@ -0,0 +1,23 @@
+
+PASS chunk of type undefined should error the stream for gzip
+PASS chunk of type undefined should error the stream for deflate
+PASS chunk of type undefined should error the stream for deflate-raw
+PASS chunk of type null should error the stream for gzip
+PASS chunk of type null should error the stream for deflate
+PASS chunk of type null should error the stream for deflate-raw
+PASS chunk of type numeric should error the stream for gzip
+PASS chunk of type numeric should error the stream for deflate
+PASS chunk of type numeric should error the stream for deflate-raw
+PASS chunk of type object, not BufferSource should error the stream for gzip
+PASS chunk of type object, not BufferSource should error the stream for deflate
+PASS chunk of type object, not BufferSource should error the stream for deflate-raw
+PASS chunk of type array should error the stream for gzip
+PASS chunk of type array should error the stream for deflate
+PASS chunk of type array should error the stream for deflate-raw
+PASS chunk of type SharedArrayBuffer should error the stream for gzip
+PASS chunk of type SharedArrayBuffer should error the stream for deflate
+PASS chunk of type SharedArrayBuffer should error the stream for deflate-raw
+PASS chunk of type shared Uint8Array should error the stream for gzip
+PASS chunk of type shared Uint8Array should error the stream for deflate
+PASS chunk of type shared Uint8Array should error the stream for deflate-raw
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.js

@@ -0,0 +1,74 @@
+// META: global=window,worker
+
+'use strict';
+
+const badChunks = [
+  {
+    name: 'undefined',
+    value: undefined
+  },
+  {
+    name: 'null',
+    value: null
+  },
+  {
+    name: 'numeric',
+    value: 3.14
+  },
+  {
+    name: 'object, not BufferSource',
+    value: {}
+  },
+  {
+    name: 'array',
+    value: [65]
+  },
+  {
+    name: 'SharedArrayBuffer',
+    // Use a getter to postpone construction so that all tests don't fail where
+    // SharedArrayBuffer is not yet implemented.
+    get value() {
+      // See https://github.com/whatwg/html/issues/5380 for why not `new SharedArrayBuffer()`
+      return new WebAssembly.Memory({ shared:true, initial:1, maximum:1 }).buffer;
+    }
+  },
+  {
+    name: 'shared Uint8Array',
+    get value() {
+      // See https://github.com/whatwg/html/issues/5380 for why not `new SharedArrayBuffer()`
+      return new Uint8Array(new WebAssembly.Memory({ shared:true, initial:1, maximum:1 }).buffer)
+    }
+  },
+];
+
+for (const chunk of badChunks) {
+  promise_test(async t => {
+    const cs = new CompressionStream('gzip');
+    const reader = cs.readable.getReader();
+    const writer = cs.writable.getWriter();
+    const writePromise = writer.write(chunk.value);
+    const readPromise = reader.read();
+    await promise_rejects_js(t, TypeError, writePromise, 'write should reject');
+    await promise_rejects_js(t, TypeError, readPromise, 'read should reject');
+  }, `chunk of type ${chunk.name} should error the stream for gzip`);
+
+  promise_test(async t => {
+    const cs = new CompressionStream('deflate');
+    const reader = cs.readable.getReader();
+    const writer = cs.writable.getWriter();
+    const writePromise = writer.write(chunk.value);
+    const readPromise = reader.read();
+    await promise_rejects_js(t, TypeError, writePromise, 'write should reject');
+    await promise_rejects_js(t, TypeError, readPromise, 'read should reject');
+  }, `chunk of type ${chunk.name} should error the stream for deflate`);
+
+  promise_test(async t => {
+    const cs = new CompressionStream('deflate-raw');
+    const reader = cs.readable.getReader();
+    const writer = cs.writable.getWriter();
+    const writePromise = writer.write(chunk.value);
+    const readPromise = reader.read();
+    await promise_rejects_js(t, TypeError, writePromise, 'write should reject');
+    await promise_rejects_js(t, TypeError, readPromise, 'read should reject');
+  }, `chunk of type ${chunk.name} should error the stream for deflate-raw`);
+}

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.serviceworker-expected.txt

@@ -0,0 +1,23 @@
+
+PASS chunk of type undefined should error the stream for gzip
+PASS chunk of type undefined should error the stream for deflate
+PASS chunk of type undefined should error the stream for deflate-raw
+PASS chunk of type null should error the stream for gzip
+PASS chunk of type null should error the stream for deflate
+PASS chunk of type null should error the stream for deflate-raw
+PASS chunk of type numeric should error the stream for gzip
+PASS chunk of type numeric should error the stream for deflate
+PASS chunk of type numeric should error the stream for deflate-raw
+PASS chunk of type object, not BufferSource should error the stream for gzip
+PASS chunk of type object, not BufferSource should error the stream for deflate
+PASS chunk of type object, not BufferSource should error the stream for deflate-raw
+PASS chunk of type array should error the stream for gzip
+PASS chunk of type array should error the stream for deflate
+PASS chunk of type array should error the stream for deflate-raw
+PASS chunk of type SharedArrayBuffer should error the stream for gzip
+PASS chunk of type SharedArrayBuffer should error the stream for deflate
+PASS chunk of type SharedArrayBuffer should error the stream for deflate-raw
+PASS chunk of type shared Uint8Array should error the stream for gzip
+PASS chunk of type shared Uint8Array should error the stream for deflate
+PASS chunk of type shared Uint8Array should error the stream for deflate-raw
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.serviceworker.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.sharedworker-expected.txt

@@ -0,0 +1,23 @@
+
+PASS chunk of type undefined should error the stream for gzip
+PASS chunk of type undefined should error the stream for deflate
+PASS chunk of type undefined should error the stream for deflate-raw
+PASS chunk of type null should error the stream for gzip
+PASS chunk of type null should error the stream for deflate
+PASS chunk of type null should error the stream for deflate-raw
+PASS chunk of type numeric should error the stream for gzip
+PASS chunk of type numeric should error the stream for deflate
+PASS chunk of type numeric should error the stream for deflate-raw
+PASS chunk of type object, not BufferSource should error the stream for gzip
+PASS chunk of type object, not BufferSource should error the stream for deflate
+PASS chunk of type object, not BufferSource should error the stream for deflate-raw
+PASS chunk of type array should error the stream for gzip
+PASS chunk of type array should error the stream for deflate
+PASS chunk of type array should error the stream for deflate-raw
+PASS chunk of type SharedArrayBuffer should error the stream for gzip
+PASS chunk of type SharedArrayBuffer should error the stream for deflate
+PASS chunk of type SharedArrayBuffer should error the stream for deflate-raw
+PASS chunk of type shared Uint8Array should error the stream for gzip
+PASS chunk of type shared Uint8Array should error the stream for deflate
+PASS chunk of type shared Uint8Array should error the stream for deflate-raw
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.sharedworker.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.worker-expected.txt

@@ -0,0 +1,23 @@
+
+PASS chunk of type undefined should error the stream for gzip
+PASS chunk of type undefined should error the stream for deflate
+PASS chunk of type undefined should error the stream for deflate-raw
+PASS chunk of type null should error the stream for gzip
+PASS chunk of type null should error the stream for deflate
+PASS chunk of type null should error the stream for deflate-raw
+PASS chunk of type numeric should error the stream for gzip
+PASS chunk of type numeric should error the stream for deflate
+PASS chunk of type numeric should error the stream for deflate-raw
+PASS chunk of type object, not BufferSource should error the stream for gzip
+PASS chunk of type object, not BufferSource should error the stream for deflate
+PASS chunk of type object, not BufferSource should error the stream for deflate-raw
+PASS chunk of type array should error the stream for gzip
+PASS chunk of type array should error the stream for deflate
+PASS chunk of type array should error the stream for deflate-raw
+PASS chunk of type SharedArrayBuffer should error the stream for gzip
+PASS chunk of type SharedArrayBuffer should error the stream for deflate
+PASS chunk of type SharedArrayBuffer should error the stream for deflate-raw
+PASS chunk of type shared Uint8Array should error the stream for gzip
+PASS chunk of type shared Uint8Array should error the stream for deflate
+PASS chunk of type shared Uint8Array should error the stream for deflate-raw
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-bad-chunks.tentative.any.worker.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any-expected.txt

@@ -0,0 +1,11 @@
+
+PASS the result of compressing [,Hello,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate-raw should be 'HelloHello'
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.js

@@ -0,0 +1,63 @@
+// META: global=window,worker
+// META: script=third_party/pako/pako_inflate.min.js
+// META: timeout=long
+
+'use strict';
+
+// This test asserts that compressing '' doesn't affect the compressed data.
+// Example: compressing ['Hello', '', 'Hello'] results in 'HelloHello'
+
+async function compressChunkList(chunkList, format) {
+  const cs = new CompressionStream(format);
+  const writer = cs.writable.getWriter();
+  for (const chunk of chunkList) {
+    const chunkByte = new TextEncoder().encode(chunk);
+    writer.write(chunkByte);
+  }
+  const closePromise = writer.close();
+  const out = [];
+  const reader = cs.readable.getReader();
+  let totalSize = 0;
+  while (true) {
+    const { value, done } = await reader.read();
+    if (done)
+      break;
+    out.push(value);
+    totalSize += value.byteLength;
+  }
+  await closePromise;
+  const concatenated = new Uint8Array(totalSize);
+  let offset = 0;
+  for (const array of out) {
+    concatenated.set(array, offset);
+    offset += array.byteLength;
+  }
+  return concatenated;
+}
+
+const chunkLists = [
+  ['', 'Hello', 'Hello'],
+  ['Hello', '', 'Hello'],
+  ['Hello', 'Hello', '']
+];
+const expectedValue = new TextEncoder().encode('HelloHello');
+
+for (const chunkList of chunkLists) {
+  promise_test(async t => {
+    const compressedData = await compressChunkList(chunkList, 'deflate');
+    // decompress with pako, and check that we got the same result as our original string
+    assert_array_equals(expectedValue, pako.inflate(compressedData), 'value should match');
+  }, `the result of compressing [${chunkList}] with deflate should be 'HelloHello'`);
+
+  promise_test(async t => {
+    const compressedData = await compressChunkList(chunkList, 'gzip');
+    // decompress with pako, and check that we got the same result as our original string
+    assert_array_equals(expectedValue, pako.inflate(compressedData), 'value should match');
+  }, `the result of compressing [${chunkList}] with gzip should be 'HelloHello'`);
+
+  promise_test(async t => {
+    const compressedData = await compressChunkList(chunkList, 'deflate-raw');
+    // decompress with pako, and check that we got the same result as our original string
+    assert_array_equals(expectedValue, pako.inflateRaw(compressedData), 'value should match');
+  }, `the result of compressing [${chunkList}] with deflate-raw should be 'HelloHello'`);
+}

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.serviceworker-expected.txt

@@ -0,0 +1,11 @@
+
+PASS the result of compressing [,Hello,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate-raw should be 'HelloHello'
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.serviceworker.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.sharedworker-expected.txt

@@ -0,0 +1,11 @@
+
+PASS the result of compressing [,Hello,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate-raw should be 'HelloHello'
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.sharedworker.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.worker-expected.txt

@@ -0,0 +1,11 @@
+
+PASS the result of compressing [,Hello,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [,Hello,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,,Hello] with deflate-raw should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with gzip should be 'HelloHello'
+PASS the result of compressing [Hello,Hello,] with deflate-raw should be 'HelloHello'
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-including-empty-chunk.tentative.any.worker.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->

LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any-expected.txt

@@ -0,0 +1,47 @@
+
+PASS compressing 2 chunks with deflate should work
+PASS compressing 2 chunks with gzip should work
+PASS compressing 2 chunks with deflate-raw should work
+PASS compressing 3 chunks with deflate should work
+PASS compressing 3 chunks with gzip should work
+PASS compressing 3 chunks with deflate-raw should work
+PASS compressing 4 chunks with deflate should work
+PASS compressing 4 chunks with gzip should work
+PASS compressing 4 chunks with deflate-raw should work
+PASS compressing 5 chunks with deflate should work
+PASS compressing 5 chunks with gzip should work
+PASS compressing 5 chunks with deflate-raw should work
+PASS compressing 6 chunks with deflate should work
+PASS compressing 6 chunks with gzip should work
+PASS compressing 6 chunks with deflate-raw should work
+PASS compressing 7 chunks with deflate should work
+PASS compressing 7 chunks with gzip should work
+PASS compressing 7 chunks with deflate-raw should work
+PASS compressing 8 chunks with deflate should work
+PASS compressing 8 chunks with gzip should work
+PASS compressing 8 chunks with deflate-raw should work
+PASS compressing 9 chunks with deflate should work
+PASS compressing 9 chunks with gzip should work
+PASS compressing 9 chunks with deflate-raw should work
+PASS compressing 10 chunks with deflate should work
+PASS compressing 10 chunks with gzip should work
+PASS compressing 10 chunks with deflate-raw should work
+PASS compressing 11 chunks with deflate should work
+PASS compressing 11 chunks with gzip should work
+PASS compressing 11 chunks with deflate-raw should work
+PASS compressing 12 chunks with deflate should work
+PASS compressing 12 chunks with gzip should work
+PASS compressing 12 chunks with deflate-raw should work
+PASS compressing 13 chunks with deflate should work
+PASS compressing 13 chunks with gzip should work
+PASS compressing 13 chunks with deflate-raw should work
+PASS compressing 14 chunks with deflate should work
+PASS compressing 14 chunks with gzip should work
+PASS compressing 14 chunks with deflate-raw should work
+PASS compressing 15 chunks with deflate should work
+PASS compressing 15 chunks with gzip should work
+PASS compressing 15 chunks with deflate-raw should work
+PASS compressing 16 chunks with deflate should work
+PASS compressing 16 chunks with gzip should work
+PASS compressing 16 chunks with deflate-raw should work
+

LayoutTests/imported/w3c/web-platform-tests/compression/compression-multiple-chunks.tentative.any.html

@@ -0,0 +1 @@
+<!-- This file is required for WebKit test infrastructure to run the templated test -->