1 files changed, 42 insertions, 0 deletions
diff --git a/spec/bundler/support/artifice/compact_index_partial_update_no_digest_not_incremental.rb b/spec/bundler/support/artifice/compact_index_partial_update_no_digest_not_incremental.rb
new file mode 100644
index 0000000000..99bae039f0
--- /dev/null
+++ b/spec/bundler/support/artifice/compact_index_partial_update_no_digest_not_incremental.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require_relative "helpers/compact_index"
+
+# The purpose of this Artifice is to test that an incremental response  is ignored
+# when the digest is not present to verify that the partial response is valid.
+class CompactIndexPartialUpdateNoDigestNotIncremental < CompactIndexAPI
+  def partial_update_no_digest
+    response_body = yield
+    headers "Surrogate-Control" => "max-age=2592000, stale-while-revalidate=60"
+    content_type "text/plain"
+    requested_range_for(response_body)
+  end
+
+  get "/versions" do
+    partial_update_no_digest do
+      file = tmp("versions.list")
+      FileUtils.rm_f(file)
+      file = CompactIndex::VersionsFile.new(file.to_s)
+      file.create(gems)
+      lines = file.contents([], calculate_info_checksums: true).split("\n")
+      name, versions, checksum = lines.last.split(" ")
+
+      # shuffle versions so new versions are not appended to the end
+      [*lines[0..-2], [name, versions.split(",").reverse.join(","), checksum].join(" ")].join("\n")
+    end
+  end
+
+  get "/info/:name" do
+    partial_update_no_digest do
+      gem = gems.find {|g| g.name == params[:name] }
+      lines = CompactIndex.info(gem ? gem.versions : []).split("\n")
+
+      # shuffle versions so new versions are not appended to the end
+      [lines.first, lines.last, *lines[1..-2]].join("\n")
+    end
+  end
+end
+
+require_relative "helpers/artifice"
+
+Artifice.activate_with(CompactIndexPartialUpdateNoDigestNotIncremental)