mozilla-central/toolkit/mozapps/update/tests/unit_aus_update/updateSyncManager.js (file symbol)

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Test Info: Warnings

/* Any copyright is dedicated to the Public Domain.
*/
// This test verifies that the update sync manager is working correctly by
// a) making sure we're the only one that's opened it to begin with, and then
// b) starting a second copy of the same binary and making sure we can tell we
// are no longer the only one that's opened it.
add_task(async function () {
setupTestCommon();
// First check that we believe we exclusively hold the lock.
let syncManager = Cc["@mozilla.org/updates/update-sync-manager;1"].getService(
Ci.nsIUpdateSyncManager
);
Assert.ok(
!syncManager.isOtherInstanceRunning(),
"no other instance is running yet"
);
// Now start a second copy of this xpcshell binary so that something else
// takes the same lock. Run the second copy two times, to show the lock is
// usable after having been closed.
for (let runs = 0; runs < 2; runs++) {
// Actually invoke the process.
runInSubprocessWithPrelude(getTestDirFile("syncManagerTestChild.js").path);
// It will take the new xpcshell a little time to start up, but we should see
// the effect on the lock within at most a few seconds.
await TestUtils.waitForCondition(
() => syncManager.isOtherInstanceRunning(),
"waiting for child process to take the lock"
).catch(_e => {
// Rather than throwing out of waitForCondition(), catch and log the failure
// manually so that we get output that's a bit more readable.
Assert.ok(
syncManager.isOtherInstanceRunning(),
"child process has the lock"
);
});
// The lock should have been closed when the process exited, but we'll allow
// a little time for the OS to clean up the handle.
await TestUtils.waitForCondition(
() => !syncManager.isOtherInstanceRunning(),
"waiting for child process to release the lock"
).catch(_e => {
Assert.ok(
!syncManager.isOtherInstanceRunning(),
"child process has released the lock"
);
});
}
await doTestFinish();
});