NixOS VM tests: Difference between revisions

Line 7:

The driver (of the form /nix/store/668bqxvsv6rn9hy8n4nmaps9ma2i5k4r-nixos-test-driver-<TESTNAME>) will launch the different vms passed as arguments.

~~This is the role of the~~ wrapper bin/nixos-run-vms to start the driver with the correct VM script as arguments.

The wrapper `bin/nixos-run-vms` is in charge to start the driver with the correct VM script as arguments.

~~If only one VM~~ is ~~specified then~~, the ~~driver~~ will ~~drop~~ you ~~into~~

Once the driver is loaded, depending on the environment variables `tests` it will run in an interactive mode or run some perl code (`testScript`).

In interactive mode, you can run `startAll` followed by `joinAll` to start and keep the VM alive

~~Once the driver~~

How to debug tests ?

== How to debug tests ? ==

You can run the tests interactively as described in nixos manual.

When you run `nix-build ./nixos/tests/login.nix`, the resulting output gives you a summary of the results, but to gain access to the VM, you can run `nix repl ./nixos/tests/login.nix` and see the ran VM via `driver.outPath`.

@@ Line 7: / Line 7: @@
 The driver (of the form /nix/store/668bqxvsv6rn9hy8n4nmaps9ma2i5k4r-nixos-test-driver-<TESTNAME>) will launch the different vms passed as arguments.
-This is the role of the wrapper bin/nixos-run-vms to start the driver with the correct VM script as arguments.
+The wrapper `bin/nixos-run-vms` is in charge to start the driver with the correct VM script as arguments.
-If only one VM is specified then, the driver will drop you into
+Once the driver is loaded, depending on the environment variables `tests` it will run in an interactive mode or run some perl code (`testScript`).
+In interactive mode, you can run `startAll` followed by `joinAll` to start and keep the VM alive
-Once the driver
-How to debug tests ?
+== How to debug tests ? ==
 You can run the tests interactively as described in nixos manual.
 When you run `nix-build ./nixos/tests/login.nix`, the resulting output gives you a summary of the results, but to gain access to the VM, you can run `nix repl ./nixos/tests/login.nix` and see the ran VM via `driver.outPath`.