element-web/test/test-utils.js
2019-11-04 12:46:28 +00:00

60 lines
1.8 KiB
JavaScript

"use strict";
/**
* Perform common actions before each test case, e.g. printing the test case
* name to stdout.
* @param {Mocha.Context} context The test context
*/
export function beforeEach(context) {
const desc = context.currentTest.fullTitle();
console.log();
console.log(desc);
console.log(new Array(1 + desc.length).join("="));
// some tests store things in localstorage. Improve independence of tests
// by making sure that they don't inherit any old state.
window.localStorage.clear();
}
/**
* returns true if the current environment supports webrtc
*/
export function browserSupportsWebRTC() {
const n = global.window.navigator;
return n.getUserMedia || n.webkitGetUserMedia ||
n.mozGetUserMedia;
}
export function deleteIndexedDB(dbName) {
return new Promise((resolve, reject) => {
if (!window.indexedDB) {
resolve();
return;
}
const startTime = Date.now();
console.log(`${startTime}: Removing indexeddb instance: ${dbName}`);
const req = window.indexedDB.deleteDatabase(dbName);
req.onblocked = () => {
console.log(`${Date.now()}: can't yet delete indexeddb ${dbName} because it is open elsewhere`);
};
req.onerror = (ev) => {
reject(new Error(
`${Date.now()}: unable to delete indexeddb ${dbName}: ${ev.target.error}`,
));
};
req.onsuccess = () => {
const now = Date.now();
console.log(`${now}: Removed indexeddb instance: ${dbName} in ${now-startTime} ms`);
resolve();
};
}).catch((e) => {
console.error(`${Date.now()}: Error removing indexeddb instance ${dbName}: ${e}`);
throw e;
});
}
export const sleep = (ms) => new Promise((resolve) => { setTimeout(resolve, ms); });