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diff --git a/devtools/server/tests/unit/test_promises_client_getdependentpromises.js b/devtools/server/tests/unit/test_promises_client_getdependentpromises.js
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+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Test that we can get the list of dependent promises from the ObjectClient.
+ */
+
+"use strict";
+
+const { PromisesFront } = require("devtools/shared/fronts/promises");
+
+var events = require("sdk/event/core");
+
+add_task(function* () {
+ let client = yield startTestDebuggerServer("test-promises-dependentpromises");
+ let chromeActors = yield getChromeActors(client);
+ yield attachTab(client, chromeActors);
+
+ ok(Promise.toString().includes("native code"), "Expect native DOM Promise.");
+
+ yield testGetDependentPromises(client, chromeActors, () => {
+ let p = new Promise(() => {});
+ p.name = "p";
+ let q = p.then();
+ q.name = "q";
+ let r = p.then(null, () => {});
+ r.name = "r";
+
+ return p;
+ });
+
+ let response = yield listTabs(client);
+ let targetTab = findTab(response.tabs, "test-promises-dependentpromises");
+ ok(targetTab, "Found our target tab.");
+ yield attachTab(client, targetTab);
+
+ yield testGetDependentPromises(client, targetTab, () => {
+ const debuggee =
+ DebuggerServer.getTestGlobal("test-promises-dependentpromises");
+
+ let p = new debuggee.Promise(() => {});
+ p.name = "p";
+ let q = p.then();
+ q.name = "q";
+ let r = p.then(null, () => {});
+ r.name = "r";
+
+ return p;
+ });
+
+ yield close(client);
+});
+
+function* testGetDependentPromises(client, form, makePromises) {
+ let front = PromisesFront(client, form);
+
+ yield front.attach();
+ yield front.listPromises();
+
+ // Get the grip for promise p
+ let onNewPromise = new Promise(resolve => {
+ events.on(front, "new-promises", promises => {
+ for (let p of promises) {
+ if (p.preview.ownProperties.name &&
+ p.preview.ownProperties.name.value === "p") {
+ resolve(p);
+ }
+ }
+ });
+ });
+
+ let promise = makePromises();
+
+ let grip = yield onNewPromise;
+ ok(grip, "Found our promise p.");
+
+ let objectClient = new ObjectClient(client, grip);
+ ok(objectClient, "Got Object Client.");
+
+ // Get the dependent promises for promise p and assert that the list of
+ // dependent promises is correct
+ yield new Promise(resolve => {
+ objectClient.getDependentPromises(response => {
+ let dependentNames = response.promises.map(p =>
+ p.preview.ownProperties.name.value);
+ let expectedDependentNames = ["q", "r"];
+
+ equal(dependentNames.length, expectedDependentNames.length,
+ "Got expected number of dependent promises.");
+
+ for (let i = 0; i < dependentNames.length; i++) {
+ equal(dependentNames[i], expectedDependentNames[i],
+ "Got expected dependent name.");
+ }
+
+ for (let p of response.promises) {
+ equal(p.type, "object", "Expect type to be Object.");
+ equal(p.class, "Promise", "Expect class to be Promise.");
+ equal(typeof p.promiseState.creationTimestamp, "number",
+ "Expect creation timestamp to be a number.");
+ ok(!p.promiseState.timeToSettle,
+ "Expect time to settle to be undefined.");
+ }
+
+ resolve();
+ });
+ });
+
+ yield front.detach();
+ // Appease eslint
+ void promise;
+}