1 files changed, 173 insertions, 0 deletions
diff --git a/toolkit/components/processtools/tests/browser/browser_test_procinfo.js b/toolkit/components/processtools/tests/browser/browser_test_procinfo.js
new file mode 100644
index 0000000000..87ceadf8fa
--- /dev/null
+++ b/toolkit/components/processtools/tests/browser/browser_test_procinfo.js
@@ -0,0 +1,173 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+const DUMMY_URL =
+  getRootDirectory(gTestPath).replace(
+    "chrome://mochitests/content",
+    "http://example.com"
+  ) + "/dummy.html";
+
+const { AppConstants } = ChromeUtils.import(
+  "resource://gre/modules/AppConstants.jsm"
+);
+const MAC = AppConstants.platform == "macosx";
+const HAS_THREAD_NAMES =
+  AppConstants.platform != "win" ||
+  AppConstants.isPlatformAndVersionAtLeast("win", 10);
+const isFissionEnabled = SpecialPowers.useRemoteSubframes;
+
+const SAMPLE_SIZE = 10;
+
+add_task(async function test_proc_info() {
+  console.log("YORIC", "Test starts");
+  // Open a few `about:home` tabs, they'll end up in `privilegedabout`.
+  let tabsAboutHome = [];
+  for (let i = 0; i < 5; ++i) {
+    let tab = BrowserTestUtils.addTab(gBrowser, "about:home");
+    tabsAboutHome.push(tab);
+    gBrowser.selectedTab = tab;
+    await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  }
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: DUMMY_URL },
+    async function(browser) {
+      let cpuThreads = 0;
+      let cpuUser = 0;
+
+      // We test `SAMPLE_SIZE` times to increase a tad the chance of encountering race conditions.
+      for (let z = 0; z < SAMPLE_SIZE; z++) {
+        let parentProc = await ChromeUtils.requestProcInfo();
+        cpuUser += parentProc.cpuUser;
+
+        Assert.equal(
+          parentProc.type,
+          "browser",
+          "Parent proc type should be browser"
+        );
+
+        for (var x = 0; x < parentProc.threads.length; x++) {
+          cpuThreads += parentProc.threads[x].cpuUser;
+        }
+
+        // Under Windows, thread names appeared with Windows 10.
+        if (HAS_THREAD_NAMES) {
+          Assert.ok(
+            parentProc.threads.some(thread => thread.name),
+            "At least one of the threads of the parent process is named"
+          );
+        }
+
+        Assert.ok(
+          parentProc.residentUniqueSize > 0,
+          "Resident-unique-size was set"
+        );
+        Assert.ok(
+          parentProc.residentUniqueSize <= parentProc.residentSetSize,
+          `Resident-unique-size should be bounded by resident-set-size ${parentProc.residentUniqueSize} <= ${parentProc.residentSetSize}`
+        );
+
+        // While it's very unlikely that the parent will disappear while we're running
+        // tests, some children can easily vanish. So we go twice through the list of
+        // children. Once to test stuff that all process data respects the invariants
+        // that don't care whether we have a race condition and once to test that at
+        // least one well-known process that should not be able to vanish during
+        // the test respects all the invariants.
+        for (var i = 0; i < parentProc.children.length; i++) {
+          let childProc = parentProc.children[i];
+          Assert.notEqual(
+            childProc.type,
+            "browser",
+            "Child proc type should not be browser"
+          );
+
+          // We set the `childID` for child processes that have a `ContentParent`/`ContentChild`
+          // actor hierarchy.
+          if (childProc.type.startsWith("web")) {
+            Assert.notEqual(
+              childProc.childID,
+              0,
+              "Child proc should have been set"
+            );
+          }
+          Assert.notEqual(
+            childProc.type,
+            "unknown",
+            "Child proc type should be known"
+          );
+          if (childProc.type == "webIsolated") {
+            Assert.notEqual(
+              childProc.origin || "",
+              "",
+              "Child process should have an origin"
+            );
+          }
+
+          for (var y = 0; y < childProc.threads.length; y++) {
+            cpuThreads += childProc.threads[y].cpuUser;
+          }
+          cpuUser += childProc.cpuUser;
+        }
+
+        // We only check other properties on the `privilegedabout` subprocess, which
+        // as of this writing is always active and available.
+        var hasPrivilegedAbout = false;
+        var numberOfAboutTabs = 0;
+        for (i = 0; i < parentProc.children.length; i++) {
+          let childProc = parentProc.children[i];
+          if (childProc.type != "privilegedabout") {
+            continue;
+          }
+          hasPrivilegedAbout = true;
+          Assert.ok(
+            childProc.residentUniqueSize > 0,
+            "Resident-unique-size was set"
+          );
+          Assert.ok(
+            childProc.residentUniqueSize <= childProc.residentSetSize,
+            `Resident-unique-size should be bounded by resident-set-size ${childProc.residentUniqueSize} <= ${childProc.residentSetSize}`
+          );
+
+          for (var win of childProc.windows) {
+            if (win.documentURI.spec != "about:home") {
+              // We're only interested in about:home for this test.
+              continue;
+            }
+            numberOfAboutTabs++;
+            Assert.ok(
+              win.outerWindowId > 0,
+              `ContentParentID should be > 0 ${win.outerWindowId}`
+            );
+            if (win.documentTitle) {
+              // Unfortunately, we sometimes reach this point before the document is fully loaded, so
+              // `win.documentTitle` may still be empty.
+              Assert.equal(win.documentTitle, "New Tab");
+            }
+          }
+          Assert.ok(
+            numberOfAboutTabs >= tabsAboutHome.length,
+            "We have found at least as many about:home tabs as we opened"
+          );
+
+          // Once we have verified the privileged about process, bailout.
+          break;
+        }
+
+        Assert.ok(
+          hasPrivilegedAbout,
+          "We have found the privileged about process"
+        );
+      }
+      // see https://bugzilla.mozilla.org/show_bug.cgi?id=1529023
+      if (!MAC) {
+        Assert.greater(cpuThreads, 0, "Got some cpu time in the threads");
+      }
+      Assert.greater(cpuUser, 0, "Got some cpu time");
+
+      for (let tab of tabsAboutHome) {
+        BrowserTestUtils.removeTab(tab);
+      }
+    }
+  );
+});