chore: Refactor tests

tests/basic.nix

@@ -7,7 +7,10 @@ pkgs.testers.runNixOSTest (_: {
   nodes.machine =
     { config, ... }:
     {
-      imports = [ ../modules ];
+      imports = [
+        ./common
+        ../modules
+      ];
 
       system.extraDependencies = [ hello ];
 
@@ -22,7 +25,7 @@ pkgs.testers.runNixOSTest (_: {
       services.nginx = {
         enable = true;
         recommendedProxySettings = true;
-        virtualHosts.cachix = {
+        virtualHosts.cache = {
           default = true;
           locations = {
             "/one".return = "302 /one/";
@@ -52,7 +55,7 @@ pkgs.testers.runNixOSTest (_: {
         if out != "nar-bridge":
             sys.exit(1)
     with subtest("Nar upload"):
-        machine.succeed("nix copy --extra-experimental-features nix-command --to 'http://127.0.0.1/one/?compression=none' ${hello}")
+        machine.succeed("nix copy --to 'http://127.0.0.1/one/?compression=none' ${hello}")
     with subtest("narinfo retrieve"):
         narHash = "${hello}"[11:11+32]
         machine.succeed(f"curl -f 'http://127.0.0.1/one/{narHash}.narinfo'")

tests/common/default.nix

@@ -0,0 +1 @@
+{ imports = [ ./nix.nix ]; }

tests/common/nix.nix

@@ -0,0 +1,8 @@
+{
+  nix.settings = {
+    extra-experimental-features = [
+      "nix-command"
+      "flakes"
+    ];
+  };
+}