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); }, };