test_action-take-snapshot.js

Enable keyboard shortcuts

/* Any copyright is dedicated to the Public Domain.

   http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

/**

 * Tests the async reducer responding to the action `takeSnapshot(front)`

*/

const actions = require("resource://devtools/client/memory/actions/snapshot.js");

const {

  snapshotState: states,

} = require("resource://devtools/client/memory/constants.js");

add_task(async function () {

  const front = new StubbedMemoryFront();

  await front.attach();

  const store = Store();

  const unsubscribe = store.subscribe(checkState);

  let foundPendingState = false;

  let foundDoneState = false;

  function checkState() {

    const { snapshots } = store.getState();

    const lastSnapshot = snapshots[snapshots.length - 1];

    if (lastSnapshot.state === states.SAVING) {

      foundPendingState = true;

ok(

        foundPendingState,

        "Got state change for pending heap snapshot request"

);

      ok(!lastSnapshot.path, "Snapshot does not yet have a path");

      ok(!lastSnapshot.census, "Has no census data when loading");

    } else if (lastSnapshot.state === states.SAVED) {

      foundDoneState = true;

ok(

        foundDoneState,

        "Got state change for completed heap snapshot request"

);

      ok(foundPendingState, "SAVED state occurs after SAVING state");

      ok(lastSnapshot.path, "Snapshot fetched with a path");

ok(

        snapshots.every(s => s.selected === (s.id === lastSnapshot.id)),

        "Only recent snapshot is selected"

);

  for (let i = 0; i < 4; i++) {

    store.dispatch(actions.takeSnapshot(front));

    await waitUntilState(store, () => foundPendingState && foundDoneState);

    // reset state trackers

    foundDoneState = foundPendingState = false;

  unsubscribe();

});