1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
"use strict";
const { XPCShellContentUtils } = ChromeUtils.importESModule(
"resource://testing-common/XPCShellContentUtils.sys.mjs"
);
XPCShellContentUtils.init(this);
function childFrameScript() {
/* eslint-env mozilla/frame-script */
const messageName = "test:blob-slice-test";
const blobData = ["So", " ", "many", " ", "blobs!"];
const blobText = blobData.join("");
const blobType = "text/plain";
const sliceText = "an";
function info(msg) {
sendAsyncMessage(messageName, { op: "info", msg });
}
function ok(condition, name, diag) {
sendAsyncMessage(messageName, { op: "ok", condition, name, diag });
}
function is(a, b, name) {
let pass = a == b;
let diag = pass ? "" : "got " + a + ", expected " + b;
ok(pass, name, diag);
}
function finish(result) {
sendAsyncMessage(messageName, { op: "done", result });
}
function grabAndContinue(arg) {
testGenerator.next(arg);
}
function* testSteps() {
addMessageListener(messageName, grabAndContinue);
let message = yield undefined;
let blob = message.data;
ok(Blob.isInstance(blob), "Received a Blob");
is(blob.size, blobText.length, "Blob has correct length");
is(blob.type, blobType, "Blob has correct type");
info("Reading blob");
let reader = new FileReader();
reader.addEventListener("load", grabAndContinue);
reader.readAsText(blob);
yield undefined;
is(reader.result, blobText, "Blob has correct data");
let firstSliceStart = blobData[0].length + blobData[1].length;
let firstSliceEnd = firstSliceStart + blobData[2].length;
let slice = blob.slice(firstSliceStart, firstSliceEnd, blobType);
ok(Blob.isInstance(slice), "Slice returned a Blob");
is(slice.size, blobData[2].length, "Slice has correct length");
is(slice.type, blobType, "Slice has correct type");
info("Reading slice");
reader = new FileReader();
reader.addEventListener("load", grabAndContinue);
reader.readAsText(slice);
yield undefined;
is(reader.result, blobData[2], "Slice has correct data");
let secondSliceStart = blobData[2].indexOf("a");
let secondSliceEnd = secondSliceStart + sliceText.length;
slice = slice.slice(secondSliceStart, secondSliceEnd, blobType);
ok(Blob.isInstance(slice), "Second slice returned a Blob");
is(slice.size, sliceText.length, "Second slice has correct length");
is(slice.type, blobType, "Second slice has correct type");
info("Sending second slice");
finish(slice);
}
let testGenerator = testSteps();
testGenerator.next();
}
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 blobType = "text/plain";
const sliceText = "an";
await new Promise(resolve => {
function grabAndContinue(arg) {
testGenerator.next(arg);
}
function* testSteps() {
let slice = yield undefined;
ok(Blob.isInstance(slice), "Received a Blob");
equal(slice.size, sliceText.length, "Slice has correct size");
equal(slice.type, blobType, "Slice has correct type");
let reader = new FileReader();
reader.onload = grabAndContinue;
reader.readAsText(slice);
yield undefined;
equal(reader.result, sliceText, "Slice has correct data");
resolve();
}
let testGenerator = testSteps();
testGenerator.next();
let mm = page.browser.messageManager;
mm.addMessageListener(messageName, function (message) {
let data = message.data;
switch (data.op) {
case "info": {
info(data.msg);
break;
}
case "ok": {
ok(data.condition, data.name + " - " + data.diag);
break;
}
case "done": {
testGenerator.next(data.result);
break;
}
default: {
ok(false, "Unknown op: " + data.op);
resolve();
}
}
});
let blob = new Blob(blobData, { type: blobType });
mm.sendAsyncMessage(messageName, blob);
});
await page.close();
});
|
