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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
// Test ChromeUtils.getObjectNodeId()
function run_test() {
// Create a test object, which we want to analyse
const testObject = {
foo: {
bar: {},
},
};
const path = ChromeUtils.saveHeapSnapshot({ runtime: true });
const snapshot = ChromeUtils.readHeapSnapshot(path);
// Get the NodeId for our test object
const objectNodeIdRoot = ChromeUtils.getObjectNodeId(testObject);
const objectNodeIdFoo = ChromeUtils.getObjectNodeId(testObject.foo);
const objectNodeIdBar = ChromeUtils.getObjectNodeId(testObject.foo.bar);
// Also try to ensure that this is the right object via its retained path
const shortestPaths = snapshot.computeShortestPaths(
objectNodeIdRoot,
[objectNodeIdBar],
50
);
ok(shortestPaths);
ok(shortestPaths instanceof Map);
ok(
shortestPaths.size == 1,
"We get only one path between the root object and bar object"
);
const paths = shortestPaths.get(objectNodeIdBar);
ok(paths.length == 1, "There is only one path between root and bar");
ok(
paths[0].length == 2,
"The shortest path is made of two edges: foo and bar"
);
const [path1, path2] = paths[0];
ok(
path1.predecessor == objectNodeIdRoot,
"The first edge goes from the root object"
);
ok(path1.edge == "foo", "The first edge is the foo attribute");
ok(
path2.predecessor == objectNodeIdFoo,
"The second edge goes from the foo object"
);
ok(path2.edge == "bar", "The first edge is the bar attribute");
do_test_finished();
}
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