nixos/tests/nginx: Add subtest for Nix ETag patch

This is to make sure that we get different ETag values whenever we
switch to a different store path but with the same file contents.

I've checked this against the old behaviour without the patch and it
fails as expected.

Signed-off-by: aszlig <aszlig@nix.build>

1 files changed, 56 insertions, 14 deletions

diff --git a/nixos/tests/nginx.nix b/nixos/tests/nginx.nix
index a4d14986a14..d66d99821c1 100644
--- a/nixos/tests/nginx.nix
+++ b/nixos/tests/nginx.nix
@@ -1,18 +1,19 @@
 # verifies:
 #   1. nginx generates config file with shared http context definitions above
 #      generated virtual hosts config.
+#   2. whether the ETag header is properly generated whenever we're serving
+#      files in Nix store paths
 
-import ./make-test.nix ({ pkgs, ...} : {
+import ./make-test.nix ({ pkgs, ... }: {
   name = "nginx";
   meta = with pkgs.stdenv.lib.maintainers; {
     maintainers = [ mbbx6spp ];
   };
 
-  nodes = {
-    webserver =
-      { ... }:
-      { services.nginx.enable = true;
-        services.nginx.commonHttpConfig = ''
+  nodes = let
+    commonConfig = { pkgs, ... }: {
+      services.nginx.enable = true;
+      services.nginx.commonHttpConfig = ''
         log_format ceeformat '@cee: {"status":"$status",'
           '"request_time":$request_time,'
           '"upstream_response_time":$upstream_response_time,'
@@ -24,20 +25,61 @@ import ./make-test.nix ({ pkgs, ...} : {
           '"request":"$request",'
           '"http_referer":"$http_referer",'
           '"upstream_addr":"$upstream_addr"}';
+      '';
+      services.nginx.virtualHosts."0.my.test" = {
+        extraConfig = ''
+          access_log syslog:server=unix:/dev/log,facility=user,tag=mytag,severity=info ceeformat;
+          location /favicon.ico { allow all; access_log off; log_not_found off; }
         '';
-        services.nginx.virtualHosts."0.my.test" = {
-          extraConfig = ''
-            access_log syslog:server=unix:/dev/log,facility=user,tag=mytag,severity=info ceeformat;
-            location /favicon.ico { allow all; access_log off; log_not_found off; }
-          '';
-        };
       };
+      services.nginx.virtualHosts.localhost = {
+        root = pkgs.runCommand "testdir" {} ''
+          mkdir "$out"
+          echo hello world > "$out/index.html"
+        '';
+      };
+    };
+  in {
+    webserver = commonConfig;
+
+    newwebserver = { pkgs, lib, ... }: {
+      imports = [ commonConfig ];
+      services.nginx.virtualHosts.localhost = {
+        root = lib.mkForce (pkgs.runCommand "testdir2" {} ''
+          mkdir "$out"
+          echo hello world > "$out/index.html"
+        '');
+      };
+    };
   };
 
-  testScript = ''
-    startAll;
+  testScript = { nodes, ... }: let
+    newServerSystem = nodes.newwebserver.config.system.build.toplevel;
+    switch = "${newServerSystem}/bin/switch-to-configuration test";
+  in ''
+    my $url = 'http://localhost/index.html';
+
+    sub checkEtag {
+      my $etag = $webserver->succeed(
+        'curl -v '.$url.' 2>&1 | sed -n -e "s/^< [Ee][Tt][Aa][Gg]: *//p"'
+      );
+      $etag =~ s/\r?\n$//;
+      my $httpCode = $webserver->succeed(
+        'curl -w "%{http_code}" -X HEAD -H \'If-None-Match: '.$etag.'\' '.$url
+      );
+      chomp $httpCode;
+      die "HTTP code is not 304" unless $httpCode == 304;
+      return $etag;
+    }
 
     $webserver->waitForUnit("nginx");
     $webserver->waitForOpenPort("80");
+
+    subtest "check ETag if serving Nix store paths", sub {
+      my $oldEtag = checkEtag;
+      $webserver->succeed('${switch}');
+      my $newEtag = checkEtag;
+      die "Old ETag $oldEtag is the same as $newEtag" if $oldEtag eq $newEtag;
+    };
   '';
 })