1 files changed, 45 insertions, 0 deletions
diff --git a/nixpkgs/nixos/tests/nginx-etag-compression.nix b/nixpkgs/nixos/tests/nginx-etag-compression.nix
new file mode 100644
index 000000000000..67493ae29984
--- /dev/null
+++ b/nixpkgs/nixos/tests/nginx-etag-compression.nix
@@ -0,0 +1,45 @@
+import ./make-test-python.nix {
+  name = "nginx-etag-compression";
+
+  nodes.machine = { pkgs, lib, ... }: {
+    services.nginx = {
+      enable = true;
+      recommendedGzipSettings = true;
+      virtualHosts.default = {
+        root = pkgs.runCommandLocal "testdir" {} ''
+          mkdir "$out"
+          cat > "$out/index.html" <<EOF
+          Hello, world!
+          Hello, world!
+          Hello, world!
+          Hello, world!
+          Hello, world!
+          Hello, world!
+          Hello, world!
+          Hello, world!
+          EOF
+          ${pkgs.gzip}/bin/gzip -k "$out/index.html"
+        '';
+      };
+    };
+  };
+
+  testScript = { nodes, ... }: ''
+    machine.wait_for_unit("nginx")
+    machine.wait_for_open_port(80)
+
+    etag_plain = machine.succeed("curl -s -w'%header{etag}' -o/dev/null -H 'Accept-encoding:' http://127.0.0.1/")
+    etag_gzip = machine.succeed("curl -s -w'%header{etag}' -o/dev/null -H 'Accept-encoding:gzip' http://127.0.0.1/")
+
+    with subtest("different representations have different etags"):
+      assert etag_plain != etag_gzip, f"etags should differ: {etag_plain} == {etag_gzip}"
+
+    with subtest("etag for uncompressed response is reproducible"):
+      etag_plain_repeat = machine.succeed("curl -s -w'%header{etag}' -o/dev/null -H 'Accept-encoding:' http://127.0.0.1/")
+      assert etag_plain == etag_plain_repeat, f"etags should be the same: {etag_plain} != {etag_plain_repeat}"
+
+    with subtest("etag for compressed response is reproducible"):
+      etag_gzip_repeat = machine.succeed("curl -s -w'%header{etag}' -o/dev/null -H 'Accept-encoding:gzip' http://127.0.0.1/")
+      assert etag_gzip == etag_gzip_repeat, f"etags should be the same: {etag_gzip} != {etag_gzip_repeat}"
+  '';
+}