login test: Create and use direct reads of the TTY contents.

1 files changed, 3 insertions, 2 deletions

diff --git a/nixos/tests/login.nix b/nixos/tests/login.nix
index e793d89567bf..a6a460fb0a7d 100644
--- a/nixos/tests/login.nix
+++ b/nixos/tests/login.nix
@@ -33,10 +33,11 @@ import ./make-test.nix ({ pkgs, latestKernel ? false, ... }:
 
       # Log in as alice on a virtual console.
       subtest "virtual console login", sub {
-          $machine->sleep(2); # urgh: wait for username prompt
+          $machine->waitUntilTTYMatches(2, "login: ");
           $machine->sendChars("alice\n");
+          $machine->waitUntilTTYMatches(2, "login: alice");
           $machine->waitUntilSucceeds("pgrep login");
-          $machine->sleep(2); # urgh: wait for `Password:'
+          $machine->waitUntilTTYMatches(2, "Password: ");
           $machine->sendChars("foobar\n");
           $machine->waitUntilSucceeds("pgrep -u alice bash");
           $machine->sendChars("touch done\n");