nixosTests.pantheon: Extend the test

- Ensure greeter-compositor starts
- Ensure various environment variables are set
- Ensure multitasking view triggers
- Misc updates

nixos/tests/pantheon.nix

@@ -26,6 +26,7 @@ import ./make-test-python.nix ({ pkgs, lib, ...} :
 
     with subtest("Test we can see usernames in elementary-greeter"):
         machine.wait_for_text("${user.description}")
+        machine.wait_until_succeeds("pgrep -f io.elementary.greeter-compositor")
         # OCR was struggling with this one.
         # machine.wait_for_text("${bob.description}")
         # Ensure the password box is focused by clicking it.
@@ -39,21 +40,29 @@ import ./make-test-python.nix ({ pkgs, lib, ...} :
         machine.wait_for_x()
         machine.wait_for_file("${user.home}/.Xauthority")
         machine.succeed("xauth merge ${user.home}/.Xauthority")
+        machine.wait_until_succeeds('journalctl -t gnome-session-binary --grep "Entering running state"')
 
     with subtest("Check that logging in has given the user ownership of devices"):
         machine.succeed("getfacl -p /dev/snd/timer | grep -q ${user.name}")
 
-    with subtest("Check if pantheon session components actually start"):
+    with subtest("Check if Pantheon components actually start"):
-        machine.wait_until_succeeds("pgrep gala")
+        for i in ["gala", "io.elementary.wingpanel", "plank", "gsd-media-keys", "io.elementary.desktop.agent-polkit"]:
-        machine.wait_for_window("gala")
+            machine.wait_until_succeeds(f"pgrep -f {i}")
-        machine.wait_until_succeeds("pgrep -f io.elementary.wingpanel")
+        for i in ["gala", "io.elementary.wingpanel", "plank"]:
-        machine.wait_for_window("io.elementary.wingpanel")
+            machine.wait_for_window(i)
-        machine.wait_until_succeeds("pgrep plank")
-        machine.wait_for_window("plank")
-        machine.wait_until_succeeds("pgrep -f gsd-media-keys")
         machine.wait_for_unit("bamfdaemon.service", "${user.name}")
         machine.wait_for_unit("io.elementary.files.xdg-desktop-portal.service", "${user.name}")
 
+    with subtest("Check if various environment variables are set"):
+        cmd = "xargs --null --max-args=1 echo < /proc/$(pgrep -xf /run/current-system/sw/bin/gala)/environ"
+        machine.succeed(f"{cmd} | grep 'XDG_CURRENT_DESKTOP' | grep 'Pantheon'")
+        # Hopefully from the sessionPath option.
+        machine.succeed(f"{cmd} | grep 'XDG_DATA_DIRS' | grep 'gsettings-schemas/pantheon-agent-geoclue2'")
+        # Hopefully from login shell.
+        machine.succeed(f"{cmd} | grep '__NIXOS_SET_ENVIRONMENT_DONE' | grep '1'")
+        # See elementary-session-settings packaging.
+        machine.succeed(f"{cmd} | grep 'XDG_CONFIG_DIRS' | grep 'elementary-default-settings'")
+
     with subtest("Open elementary videos"):
         machine.execute("su - ${user.name} -c 'DISPLAY=:0 io.elementary.videos >&2 &'")
         machine.sleep(2)
@@ -61,6 +70,7 @@ import ./make-test-python.nix ({ pkgs, lib, ...} :
         machine.wait_for_text("No Videos Open")
 
     with subtest("Open elementary calendar"):
+        machine.wait_until_succeeds("pgrep -f evolution-calendar-factory")
         machine.execute("su - ${user.name} -c 'DISPLAY=:0 io.elementary.calendar >&2 &'")
         machine.sleep(2)
         machine.wait_for_window("io.elementary.calendar")
@@ -75,6 +85,14 @@ import ./make-test-python.nix ({ pkgs, lib, ...} :
         machine.execute("su - ${user.name} -c 'DISPLAY=:0 io.elementary.terminal >&2 &'")
         machine.wait_for_window("io.elementary.terminal")
 
+    with subtest("Trigger multitasking view"):
+        cmd = "dbus-send --session --dest=org.pantheon.gala --print-reply /org/pantheon/gala org.pantheon.gala.PerformAction int32:1"
+        env = "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/${toString user.uid}/bus DISPLAY=:0"
+        machine.succeed(f"su - ${user.name} -c '{env} {cmd}'")
+        machine.sleep(3)
+        machine.screenshot("multitasking")
+        machine.succeed(f"su - ${user.name} -c '{env} {cmd}'")
+
     with subtest("Check if gala has ever coredumped"):
         machine.fail("coredumpctl --json=short | grep gala")
         # So you can see the dock in the below screenshot.