tests/playwright-python: init

For some reason, chromium, which is still the nixpkgs version hangs
 inside the normal test vm, while working fine in .driverInteractive.

I suspect that might have to do with the existence of a display in
.driverInteractive. Neither vm does run X11 or wayland.

nixos/tests/all-tests.nix

@@ -785,6 +785,7 @@ in {
   plasma6 = handleTest ./plasma6.nix {};
   plasma5-systemd-start = handleTest ./plasma5-systemd-start.nix {};
   plausible = handleTest ./plausible.nix {};
+  playwright-python = handleTest ./playwright-python.nix {};
   please = handleTest ./please.nix {};
   pleroma = handleTestOn [ "x86_64-linux" "aarch64-linux" ] ./pleroma.nix {};
   plikd = handleTest ./plikd.nix {};

nixos/tests/playwright-python.nix

@@ -0,0 +1,58 @@
+import ./make-test-python.nix (
+  { pkgs, ... }:
+  {
+    name = "playwright-python";
+
+    meta = with pkgs.lib.maintainers; {
+      maintainers = [ phaer ];
+    };
+
+    nodes.machine =
+      { pkgs, ... }:
+      {
+        environment.variables = {
+          NIX_MANUAL_DOCROOT = "file://${pkgs.nix.doc}/share/doc/nix/manual/index.html";
+          PLAYWRIGHT_BROWSERS_PATH = pkgs.playwright-driver.browsers;
+        };
+        environment.systemPackages = [
+          (pkgs.writers.writePython3Bin "test_playwright"
+            {
+              libraries = [ pkgs.python3Packages.playwright ];
+            }
+            ''
+              import sys
+              from playwright.sync_api import sync_playwright
+              from playwright.sync_api import expect
+
+              browsers = {
+                "chromium": ["--headless", "--disable-gpu"],
+                "firefox": [],
+                "webkit": []
+              }
+              if len(sys.argv) != 3 or sys.argv[1] not in browsers.keys():
+                  print(f"usage: {sys.argv[0]} [{'|'.join(browsers.keys())}] <url>")
+                  sys.exit(1)
+              browser_name = sys.argv[1]
+              url = sys.argv[2]
+              browser_args = browsers.get(browser_name)
+              print(f"Running test on {browser_name} {' '.join(browser_args)}")
+              with sync_playwright() as p:
+                  browser = getattr(p, browser_name).launch(args=browser_args)
+                  context = browser.new_context()
+                  page = context.new_page()
+                  page.goto(url)
+                  expect(page.get_by_text("Nix Reference Manual")).to_be_visible()
+            ''
+          )
+        ];
+      };
+
+    testScript = ''
+      # FIXME: Webkit segfaults
+      for browser in ["firefox", "chromium"]:
+          with subtest(f"Render Nix Manual in {browser}"):
+              machine.succeed(f"test_playwright {browser} $NIX_MANUAL_DOCROOT")
+    '';
+
+  }
+)

pkgs/development/python-modules/playwright/default.nix

@@ -12,6 +12,7 @@
   setuptools,
   setuptools-scm,
   playwright-driver,
+  nixosTests,
   nodejs,
 }:
 
@@ -93,9 +94,13 @@ buildPythonPackage rec {
 
   passthru = {
     inherit driver;
-    tests = {
+    tests =
+      {
         driver = playwright-driver;
         browsers = playwright-driver.browsers;
+      }
+      // lib.optionalAttrs stdenv.isLinux {
+        inherit (nixosTests) playwright-python;
       };
     updateScript = ./update.sh;
   };