forked from mirrors/gecko-dev
140 lines
3.9 KiB
JavaScript
140 lines
3.9 KiB
JavaScript
"use strict";
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const { XPCShellContentUtils } = ChromeUtils.importESModule(
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"resource://testing-common/XPCShellContentUtils.sys.mjs"
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);
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XPCShellContentUtils.init(this);
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function childFrameScript() {
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/* eslint-env mozilla/frame-script */
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"use strict";
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const messageName = "test:blob-slice-test";
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const blobData = ["So", " ", "many", " ", "blobs!"];
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const blobType = "text/plain";
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let blob = new Blob(blobData, { type: blobType });
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let firstSliceStart = blobData[0].length + blobData[1].length;
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let firstSliceEnd = firstSliceStart + blobData[2].length;
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let slice = blob.slice(firstSliceStart, firstSliceEnd, blobType);
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let secondSliceStart = blobData[2].indexOf("a");
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let secondSliceEnd = secondSliceStart + 2;
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slice = slice.slice(secondSliceStart, secondSliceEnd, blobType);
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sendAsyncMessage(messageName, { blob });
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sendAsyncMessage(messageName, { slice });
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}
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add_task(async function test() {
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let page = await XPCShellContentUtils.loadContentPage(
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"data:text/html,<!DOCTYPE HTML><html><body></body></html>",
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{
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remote: true,
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}
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);
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page.loadFrameScript(childFrameScript);
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const messageName = "test:blob-slice-test";
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const blobData = ["So", " ", "many", " ", "blobs!"];
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const blobText = blobData.join("");
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const blobType = "text/plain";
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const sliceText = "an";
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let receivedBlob = false;
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let receivedSlice = false;
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let resolveBlob, resolveSlice;
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let blobPromise = new Promise(resolve => {
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resolveBlob = resolve;
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});
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let slicePromise = new Promise(resolve => {
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resolveSlice = resolve;
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});
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let mm = page.browser.messageManager;
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mm.addMessageListener(messageName, function(message) {
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if ("blob" in message.data) {
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equal(receivedBlob, false, "Have not yet received Blob");
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equal(receivedSlice, false, "Have not yet received Slice");
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receivedBlob = true;
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let blob = message.data.blob;
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ok(Blob.isInstance(blob), "Received a Blob");
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equal(blob.size, blobText.length, "Blob has correct size");
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equal(blob.type, blobType, "Blob has correct type");
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let slice = blob.slice(
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blobText.length - blobData[blobData.length - 1].length,
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blob.size,
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blobType
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);
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ok(Blob.isInstance(slice), "Slice returned a Blob");
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equal(
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slice.size,
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blobData[blobData.length - 1].length,
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"Slice has correct size"
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);
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equal(slice.type, blobType, "Slice has correct type");
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let reader = new FileReader();
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reader.onload = function() {
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equal(
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reader.result,
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blobData[blobData.length - 1],
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"Slice has correct data"
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);
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resolveBlob();
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};
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reader.readAsText(slice);
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} else if ("slice" in message.data) {
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equal(receivedBlob, true, "Already received Blob");
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equal(receivedSlice, false, "Have not yet received Slice");
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receivedSlice = true;
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let slice = message.data.slice;
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ok(Blob.isInstance(slice), "Received a Blob for slice");
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equal(slice.size, sliceText.length, "Slice has correct size");
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equal(slice.type, blobType, "Slice has correct type");
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let reader = new FileReader();
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reader.onload = function() {
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equal(reader.result, sliceText, "Slice has correct data");
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let slice2 = slice.slice(1, 2, blobType);
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ok(Blob.isInstance(slice2), "Slice returned a Blob");
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equal(slice2.size, 1, "Slice has correct size");
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equal(slice2.type, blobType, "Slice has correct type");
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let reader2 = new FileReader();
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reader2.onload = function() {
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equal(reader2.result, sliceText[1], "Slice has correct data");
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resolveSlice();
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};
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reader2.readAsText(slice2);
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};
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reader.readAsText(slice);
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} else {
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ok(false, "Received a bad message: " + JSON.stringify(message.data));
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}
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});
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await blobPromise;
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await slicePromise;
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await page.close();
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});
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