1 files changed, 62 insertions, 0 deletions
diff --git a/dom/base/test/browser_chromeutils_getalldomprocesses.js b/dom/base/test/browser_chromeutils_getalldomprocesses.js
new file mode 100644
index 0000000000..aef5bcf12b
--- /dev/null
+++ b/dom/base/test/browser_chromeutils_getalldomprocesses.js
@@ -0,0 +1,62 @@
+add_task(async function testParentProcess() {
+  const [parentProcess] = ChromeUtils.getAllDOMProcesses();
+  // browser.xhtml is in the parent process, so its domProcess is the parent process one
+  is(
+    parentProcess,
+    window.browsingContext.currentWindowGlobal.domProcess,
+    "The first element is the parent process"
+  );
+  is(
+    parentProcess.osPid,
+    Services.appinfo.processID,
+    "We got the right OS Pid"
+  );
+  is(parentProcess.childID, 0, "Parent process has childID set to 0");
+});
+
+add_task(async function testContentProcesses() {
+  info("Open a tab in a content process");
+  BrowserTestUtils.loadURIString(gBrowser.selectedBrowser, "about:blank");
+  await BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser);
+
+  info("Sanity checks against all returned elements of getAllDOMProcesses");
+  const processes = ChromeUtils.getAllDOMProcesses();
+  const allPids = [],
+    allChildIDs = [];
+  for (const process of processes) {
+    ok(
+      process instanceof Ci.nsIDOMProcessParent,
+      `Each element of the array is a nsIDOMProcessParent (${process})`
+    );
+    ok(process.osPid > 0, `OS Pid looks correct ${process.osPid}`);
+    if (process == processes[0]) {
+      is(
+        process.childID,
+        0,
+        `Child ID is 0 for the parent process, which is the first element of the returned array`
+      );
+      is(
+        process.remoteType,
+        null,
+        "The main process's remote type should be NOT_REMOTE"
+      );
+    } else {
+      ok(process.childID > 0, `Child ID looks also correct ${process.childID}`);
+      ok(process.remoteType, "Should have a remote type");
+    }
+
+    ok(
+      !allPids.includes(process.osPid),
+      "We only get one nsIDOMProcessParent per OS process == each osPid is different"
+    );
+    allPids.push(process.osPid);
+    ok(!allChildIDs.includes(process.childID), "Each childID is different");
+    allChildIDs.push(process.childID);
+  }
+
+  info("Search for the nsIDOMProcessParent for the opened tab");
+  const { currentWindowGlobal } = gBrowser.selectedBrowser.browsingContext;
+  const tabProcess = currentWindowGlobal.domProcess;
+  ok(processes.includes(tabProcess), "Found the tab process in the list");
+  is(tabProcess.osPid, currentWindowGlobal.osPid, "We got the right OS Pid");
+});