1 files changed, 40 insertions, 0 deletions
diff --git a/tvix/glue/src/tests/tvix_tests/eval-okay-fetchurl.nix b/tvix/glue/src/tests/tvix_tests/eval-okay-fetchurl.nix
index 8a3910152554..a3e9c5486968 100644
--- a/tvix/glue/src/tests/tvix_tests/eval-okay-fetchurl.nix
+++ b/tvix/glue/src/tests/tvix_tests/eval-okay-fetchurl.nix
@@ -22,4 +22,44 @@
     name = "notmuch-extract-patch";
     sha256 = "sha256-Xa1Jbl2Eq5+L0ww+Ph1osA3Z/Dxe/RkN1/dITQCdXFk=";
   })
+
+  # The following tests use <nix/fetchurl.nix>.
+  # This is a piece of Nix code producing a "fake derivation" which gets
+  # handled by a "custom builder" that does the actual fetching.
+  # We access `.outPath` here, as the current string output of a Derivation
+  # still differs from the way nix presents it.
+  # It behaves similar to builtins.fetchurl, except it requires a hash to be
+  # provided upfront.
+  # If `unpack` is set to true, it can unpack NAR files (decompressing if
+  # necessary)
+  # If `executable` is set to true, it will place the fetched file at the root,
+  # but make it executable, and the hash is on the NAR representation.
+
+  # Fetch a URL.
+  (import <nix/fetchurl.nix> {
+    url = "https://test.example/owo";
+    name = "notmuch-extract-patch";
+    sha256 = "Xa1Jbl2Eq5+L0ww+Ph1osA3Z/Dxe/RkN1/dITQCdXFk=";
+  }).outPath
+
+  # Fetch a NAR and unpack it, specifying the sha256 of its NAR representation.
+  (import <nix/fetchurl.nix> {
+    url = "https://cache.nixos.org/nar/0r8nqa1klm5v17ifc6z96m9wywxkjvgbnqq9pmy0sgqj53wj3n12.nar.xz";
+    sha256 = "sha256-oj6yfWKbcEerK8D9GdPJtIAOveNcsH1ztGeSARGypRA=";
+    unpack = true;
+  }).outPath
+
+  # Fetch a NAR and unpack it, specifying its *sha1* of its NAR representation.
+  (import <nix/fetchurl.nix> {
+    url = "https://cache.nixos.org/nar/0r8nqa1klm5v17ifc6z96m9wywxkjvgbnqq9pmy0sgqj53wj3n12.nar.xz";
+    hash = "sha1-F/fMsgwkXF8fPCg1v9zPZ4yOFIA=";
+    unpack = true;
+  }).outPath
+
+  # Fetch a URL, specifying the *sha1* of a NAR describing it as executable at the root.
+  (import <nix/fetchurl.nix> {
+    url = "https://cache.nixos.org/nar/0r8nqa1klm5v17ifc6z96m9wywxkjvgbnqq9pmy0sgqj53wj3n12.nar.xz";
+    hash = "sha1-NKNeU1csW5YJ4lCeWH3Z/apppNU=";
+    executable = true;
+  }).outPath
 ]