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var MIDITestUtils = {
permissionSetup: allow => {
let permPromiseRes;
let permPromise = new Promise(res => {
permPromiseRes = res;
});
SpecialPowers.pushPrefEnv(
{
set: [
["dom.webmidi.enabled", true],
["midi.testing", true],
["midi.prompt.testing", true],
["media.navigator.permission.disabled", allow],
],
},
() => {
permPromiseRes();
}
);
return permPromise;
},
// This list needs to stay synced with the ports in
// dom/midi/TestMIDIPlatformService.
inputInfo: {
get id() {
return MIDITestUtils.stableId(this);
},
name: "Test Control MIDI Device Input Port",
manufacturer: "Test Manufacturer",
version: "1.0.0",
},
outputInfo: {
get id() {
return MIDITestUtils.stableId(this);
},
name: "Test Control MIDI Device Output Port",
manufacturer: "Test Manufacturer",
version: "1.0.0",
},
stateTestInputInfo: {
get id() {
return MIDITestUtils.stableId(this);
},
name: "Test State MIDI Device Input Port",
manufacturer: "Test Manufacturer",
version: "1.0.0",
},
stateTestOutputInfo: {
get id() {
return MIDITestUtils.stableId(this);
},
name: "Test State MIDI Device Output Port",
manufacturer: "Test Manufacturer",
version: "1.0.0",
},
alwaysClosedTestOutputInfo: {
get id() {
return MIDITestUtils.stableId(this);
},
name: "Always Closed MIDI Device Output Port",
manufacturer: "Test Manufacturer",
version: "1.0.0",
},
checkPacket: (expected, actual) => {
if (expected.length != actual.length) {
ok(false, "Packet " + expected + " length not same as packet " + actual);
}
for (var i = 0; i < expected.length; ++i) {
is(expected[i], actual[i], "Packet value " + expected[i] + " matches.");
}
},
stableId: async info => {
// This computes the stable ID of a MIDI port according to the logic we
// use in the Web MIDI implementation. See MIDIPortChild::GenerateStableId()
// and nsContentUtils::AnonymizeId().
const id = info.name + info.manufacturer + info.version;
const encoder = new TextEncoder();
const data = encoder.encode(id);
const keyBytes = encoder.encode(self.origin);
const key = await crypto.subtle.importKey(
"raw",
keyBytes,
{ name: "HMAC", hash: "SHA-256" },
false,
["sign"]
);
const result = new Uint8Array(await crypto.subtle.sign("HMAC", key, data));
let resultString = "";
for (let i = 0; i < result.length; i++) {
resultString += String.fromCharCode(result[i]);
}
return btoa(resultString);
},
};
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