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How to use generateRequestForVariousSessions method in wpt

Best JavaScript code snippet using wpt

syntax-mediakeysession.js

...185            return Promise.resolve('not supported');186        }187        return mediaKeySession.generateRequest(type, initData);188    }189    function generateRequestForVariousSessions(){190        return new Promise(function(resolve, reject){191            isInitDataTypeSupported(keysystem, initDataType).then(function (isTypeSupported) {192                    assert_true(isTypeSupported, "initDataType should be supported");193                    return navigator.requestMediaKeySystemAccess(keysystem, [configuration]);194                }).then(function (access) {195                    return access.createMediaKeys();196                }).then(function (mediaKeys) {197                    var mp4SessionPromises = kCreateSessionTestCases.map(function (testCase) {198                        return test_generateRequest(testCase, mediaKeys, initDataType, initData);199                    });200                    assert_not_equals(mp4SessionPromises.length, 0);201                    return Promise.all(mp4SessionPromises);202                }).then(function () {203                   resolve();204                }).catch(function (error) {205                   reject(error);206                });207        })208    }209    promise_test(function() {210        return generateRequestForVariousSessions();211    }, testname + ' test if MediaKeySession generateRequest() resolves for various sessions');212    var kUpdateSessionExceptionsTestCases = [213        // Tests in this set use a shortened parameter name due to214        // format_value() only returning the first 60 characters as the215        // result. With a longer name (mediaKeySession) the first 60216        // characters is not enough to determine which test failed.217        // Too few parameters.218        {219            exception: 'TypeError',220            func: function (s) {221                return s.update();222            }223        },224        // Invalid parameters....

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