test_action-take-census.js

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/* 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 `takeCensus(heapWorker, snapshot)`

*/

var {

  snapshotState: states,

  censusDisplays,

  censusState,

  viewState,

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

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

var {

  changeView,

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

// This tests taking a census on a snapshot that is still being read, which

// triggers an assertion failure.

EXPECTED_DTU_ASSERT_FAILURE_COUNT = 1;

add_task(async function () {

  const front = new StubbedMemoryFront();

  const heapWorker = new HeapAnalysesClient();

  await front.attach();

  const store = Store();

  store.dispatch(changeView(viewState.CENSUS));

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

  await waitUntilState(store, () => {

    const snapshots = store.getState().snapshots;

    return snapshots.length === 1 && snapshots[0].state === states.SAVED;

});

  let snapshot = store.getState().snapshots[0];

  equal(snapshot.census, null, "No census data exists yet on the snapshot.");

  // Test error case of wrong state.

  store.dispatch(actions.takeCensus(heapWorker, snapshot.id));

  await waitUntilState(store, () => store.getState().errors.length === 1);

  dumpn("Found error: " + store.getState().errors[0]);

ok(

    /Assertion failure/.test(store.getState().errors[0]),

    "Error thrown when taking a census of a snapshot that has not been read."

);

  store.dispatch(actions.readSnapshot(heapWorker, snapshot.id));

  await waitUntilState(

    store,

    () => store.getState().snapshots[0].state === states.READ

);

  store.dispatch(actions.takeCensus(heapWorker, snapshot.id));

  await waitUntilCensusState(store, s => s.census, [censusState.SAVING]);

  await waitUntilCensusState(store, s => s.census, [censusState.SAVED]);

  snapshot = store.getState().snapshots[0];

  ok(snapshot.census, "Snapshot has census after saved census");

  ok(snapshot.census.report.children.length, "Census is in tree node form");

  equal(

    snapshot.census.display,

    censusDisplays.coarseType,

    "Snapshot stored correct display used for the census"

);

});