зеркало из https://github.com/mozilla/gecko-dev.git
168 строки
4.2 KiB
JavaScript
168 строки
4.2 KiB
JavaScript
"use strict";
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/* eslint-env mozilla/frame-script */
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const { ExtensionTestUtils } = ChromeUtils.import(
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"resource://testing-common/ExtensionXPCShellUtils.jsm"
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);
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ExtensionTestUtils.init(this);
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function 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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function info(msg) {
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sendAsyncMessage(messageName, { op: "info", msg });
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}
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function ok(condition, name, diag) {
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sendAsyncMessage(messageName, { op: "ok", condition, name, diag });
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}
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function is(a, b, name) {
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let pass = a == b;
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let diag = pass ? "" : "got " + a + ", expected " + b;
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ok(pass, name, diag);
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}
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function finish(result) {
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sendAsyncMessage(messageName, { op: "done", result });
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}
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function grabAndContinue(arg) {
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testGenerator.next(arg);
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}
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function* testSteps() {
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addMessageListener(messageName, grabAndContinue);
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let message = yield undefined;
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let blob = message.data;
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ok(Blob.isInstance(blob), "Received a Blob");
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is(blob.size, blobText.length, "Blob has correct length");
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is(blob.type, blobType, "Blob has correct type");
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info("Reading blob");
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let reader = new FileReader();
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reader.addEventListener("load", grabAndContinue);
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reader.readAsText(blob);
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yield undefined;
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is(reader.result, blobText, "Blob has correct data");
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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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ok(Blob.isInstance(slice), "Slice returned a Blob");
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is(slice.size, blobData[2].length, "Slice has correct length");
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is(slice.type, blobType, "Slice has correct type");
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info("Reading slice");
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reader = new FileReader();
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reader.addEventListener("load", grabAndContinue);
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reader.readAsText(slice);
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yield undefined;
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is(reader.result, blobData[2], "Slice has correct data");
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let secondSliceStart = blobData[2].indexOf("a");
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let secondSliceEnd = secondSliceStart + sliceText.length;
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slice = slice.slice(secondSliceStart, secondSliceEnd, blobType);
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ok(Blob.isInstance(slice), "Second slice returned a Blob");
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is(slice.size, sliceText.length, "Second slice has correct length");
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is(slice.type, blobType, "Second slice has correct type");
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info("Sending second slice");
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finish(slice);
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}
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let testGenerator = testSteps();
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testGenerator.next();
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}
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add_task(async function test() {
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let page = await ExtensionTestUtils.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 blobType = "text/plain";
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const sliceText = "an";
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await new Promise(resolve => {
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function grabAndContinue(arg) {
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testGenerator.next(arg);
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}
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function* testSteps() {
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let slice = yield undefined;
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ok(Blob.isInstance(slice), "Received a Blob");
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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 = grabAndContinue;
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reader.readAsText(slice);
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yield undefined;
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equal(reader.result, sliceText, "Slice has correct data");
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resolve();
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}
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let testGenerator = testSteps();
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testGenerator.next();
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let mm = page.browser.messageManager;
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mm.addMessageListener(messageName, function(message) {
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let data = message.data;
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switch (data.op) {
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case "info": {
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info(data.msg);
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break;
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}
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case "ok": {
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ok(data.condition, data.name + " - " + data.diag);
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break;
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}
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case "done": {
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testGenerator.next(data.result);
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break;
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}
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default: {
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ok(false, "Unknown op: " + data.op);
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resolve();
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}
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}
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});
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let blob = new Blob(blobData, { type: blobType });
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mm.sendAsyncMessage(messageName, blob);
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});
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await page.close();
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});
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