Files
tubestation/tools/code-coverage/PerTestCoverageUtils.jsm

76 lines
2.1 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* exported PerTestCoverageUtils */
"use strict";
var EXPORTED_SYMBOLS = ["PerTestCoverageUtils"];
ChromeUtils.defineModuleGetter(this, "Services", "resource://gre/modules/Services.jsm");
const env = Cc["@mozilla.org/process/environment;1"].getService(Ci.nsIEnvironment);
// This is the directory where gcov is emitting the gcda files.
const tmp_gcov_dir = env.get("GCOV_PREFIX");
// This is the directory where codecoverage.py is expecting to see the gcda files.
const gcov_dir = env.get("GCOV_RESULTS_DIR");
const enabled = !!gcov_dir;
function awaitPromise(promise) {
let ret;
let complete = false;
let error = null;
promise.catch(e => error = e).then(v => {
ret = v;
complete = true;
});
Services.tm.spinEventLoopUntil(() => complete);
if (error) {
throw new Error(error);
}
return ret;
}
var PerTestCoverageUtils = class PerTestCoverageUtilsClass {
// Resets the counters to 0.
static async beforeTest() {
if (!enabled) {
return;
}
let codeCoverageService = Cc["@mozilla.org/tools/code-coverage;1"].getService(Ci.nsICodeCoverage);
await codeCoverageService.resetCounters();
}
static beforeTestSync() {
awaitPromise(this.beforeTest());
}
// Dumps counters and moves the gcda files in the directory expected by codecoverage.py.
static async afterTest() {
if (!enabled) {
return;
}
let codeCoverageService = Cc["@mozilla.org/tools/code-coverage;1"].getService(Ci.nsICodeCoverage);
await codeCoverageService.dumpCounters();
let srcDir = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
srcDir.initWithPath(tmp_gcov_dir);
let destDir = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsIFile);
destDir.initWithPath(gcov_dir);
let srcDirEntries = srcDir.directoryEntries;
while (srcDirEntries.hasMoreElements()) {
srcDirEntries.nextFile.moveTo(destDir, null);
}
}
static afterTestSync() {
awaitPromise(this.afterTest());
}
};