1 files changed, 72 insertions, 0 deletions
diff --git a/devtools/server/tests/chrome/memory-helpers.js b/devtools/server/tests/chrome/memory-helpers.js
new file mode 100644
index 0000000000..e4db689134
--- /dev/null
+++ b/devtools/server/tests/chrome/memory-helpers.js
@@ -0,0 +1,72 @@
+/* exported Task, startServerAndGetSelectedTabMemory, destroyServerAndFinish,
+   waitForTime, waitUntil */
+"use strict";
+
+const { require } = ChromeUtils.importESModule(
+  "resource://devtools/shared/loader/Loader.sys.mjs"
+);
+const {
+  CommandsFactory,
+} = require("resource://devtools/shared/commands/commands-factory.js");
+
+// Always log packets when running tests.
+Services.prefs.setBoolPref("devtools.debugger.log", true);
+var gReduceTimePrecision = Services.prefs.getBoolPref(
+  "privacy.reduceTimerPrecision"
+);
+Services.prefs.setBoolPref("privacy.reduceTimerPrecision", false);
+SimpleTest.registerCleanupFunction(function () {
+  Services.prefs.clearUserPref("devtools.debugger.log");
+  Services.prefs.setBoolPref(
+    "privacy.reduceTimerPrecision",
+    gReduceTimePrecision
+  );
+});
+
+async function getTargetForSelectedTab() {
+  const browserWindow = Services.wm.getMostRecentWindow("navigator:browser");
+  const commands = await CommandsFactory.forTab(
+    browserWindow.gBrowser.selectedTab
+  );
+  await commands.targetCommand.startListening();
+  const isEveryFrameTargetEnabled = Services.prefs.getBoolPref(
+    "devtools.every-frame-target.enabled",
+    false
+  );
+  if (!isEveryFrameTargetEnabled) {
+    return commands.targetCommand.targetFront;
+  }
+
+  // If EFT is enabled, we need to retrieve the target of the test document
+  const targets = await commands.targetCommand.getAllTargets([
+    commands.targetCommand.TYPES.FRAME,
+  ]);
+
+  return targets.find(t => t.url !== "chrome://mochikit/content/harness.xhtml");
+}
+
+async function startServerAndGetSelectedTabMemory() {
+  const target = await getTargetForSelectedTab();
+  const memory = await target.getFront("memory");
+  return { memory, target };
+}
+
+async function destroyServerAndFinish(target) {
+  await target.destroy();
+  SimpleTest.finish();
+}
+
+function waitForTime(ms) {
+  return new Promise((resolve, reject) => {
+    setTimeout(resolve, ms);
+  });
+}
+
+function waitUntil(predicate) {
+  if (predicate()) {
+    return Promise.resolve(true);
+  }
+  return new Promise(resolve =>
+    setTimeout(() => waitUntil(predicate).then(() => resolve(true)), 10)
+  );
+}