3 files changed, 102 insertions, 0 deletions
diff --git a/remote/cdp/test/browser/systemInfo/browser.ini b/remote/cdp/test/browser/systemInfo/browser.ini
new file mode 100644
index 0000000000..39a6218d43
--- /dev/null
+++ b/remote/cdp/test/browser/systemInfo/browser.ini
@@ -0,0 +1,15 @@
+[DEFAULT]
+tags = cdp
+subsuite = remote
+args =
+  --remote-debugging-port
+  --remote-allow-origins=null
+prefs =  # Bug 1600054: Make CDP Fission compatible
+  fission.bfcacheInParent=false
+  fission.webContentIsolationStrategy=0
+support-files =
+  !/remote/cdp/test/browser/chrome-remote-interface.js
+  !/remote/cdp/test/browser/head.js
+  head.js
+
+[browser_getProcessInfo.js]
diff --git a/remote/cdp/test/browser/systemInfo/browser_getProcessInfo.js b/remote/cdp/test/browser/systemInfo/browser_getProcessInfo.js
new file mode 100644
index 0000000000..fb491e248f
--- /dev/null
+++ b/remote/cdp/test/browser/systemInfo/browser_getProcessInfo.js
@@ -0,0 +1,78 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(
+  async function getProcessInfoDetails({ client }) {
+    const { SystemInfo } = client;
+
+    const processInfo = await SystemInfo.getProcessInfo();
+    assertProcesses(processInfo);
+  },
+  { createTab: false }
+);
+
+add_task(
+  async function getProcessInfoMultipleTabs({ client }) {
+    const { SystemInfo, Target } = client;
+
+    const { newTab: newTab1 } = await openTab(Target);
+    const { newTab: newTab2 } = await openTab(Target);
+    const { newTab: newTab3 } = await openTab(Target);
+    const { newTab: newTab4 } = await openTab(Target);
+
+    const processInfo = await SystemInfo.getProcessInfo();
+    assertProcesses(processInfo, [newTab1, newTab2, newTab3, newTab4]);
+  },
+  { createTab: false }
+);
+
+add_task(
+  async function getProcessInfoMultipleWindows({ client }) {
+    const { SystemInfo, Target } = client;
+
+    const { newWindow: newWindow1 } = await openWindow(Target);
+    const { newWindow: newWindow2 } = await openWindow(Target);
+
+    const processInfo = await SystemInfo.getProcessInfo();
+    assertProcesses(processInfo, [
+      ...newWindow1.gBrowser.tabs,
+      ...newWindow2.gBrowser.tabs,
+    ]);
+
+    await BrowserTestUtils.closeWindow(newWindow1);
+    await BrowserTestUtils.closeWindow(newWindow2);
+  },
+  { createTab: false }
+);
+
+function assertProcesses(processInfo, tabs) {
+  ok(Array.isArray(processInfo), "Process info is an array");
+
+  for (const info of processInfo) {
+    ok(typeof info.id === "number", "Info has a numeric id");
+    ok(typeof info.type === "string", "Info has a string type");
+    ok(typeof info.cpuTime === "number", "Info has a numeric cpuTime");
+  }
+
+  const getByType = type => processInfo.filter(info => info.type === type);
+
+  is(
+    getByType("browser").length,
+    1,
+    "Got expected amount of browser processes"
+  );
+  ok(!!getByType("renderer").length, "Got at least one renderer process");
+
+  if (tabs) {
+    const rendererPids = new Set(
+      processInfo.filter(info => info.type === "renderer").map(info => info.id)
+    );
+
+    for (const tab of tabs) {
+      const pid = tab.linkedBrowser.browsingContext.currentWindowGlobal.osPid;
+      ok(rendererPids.has(pid), `Found process info for pid (${pid})`);
+    }
+  }
+}
diff --git a/remote/cdp/test/browser/systemInfo/head.js b/remote/cdp/test/browser/systemInfo/head.js
new file mode 100644
index 0000000000..1a1c90fbf6
--- /dev/null
+++ b/remote/cdp/test/browser/systemInfo/head.js
@@ -0,0 +1,9 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+Services.scriptloader.loadSubScript(
+  "chrome://mochitests/content/browser/remote/cdp/test/browser/head.js",
+  this
+);