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