[rubygems/rubygems] Fix checksum

Calculate the checksum of the content, not the given pathname at
the build time itself.

https://github.com/rubygems/rubygems/commit/b60ee97ee9

1 files changed, 6 insertions, 0 deletions

diff --git a/spec/bundler/bundler/gem_helper_spec.rb b/spec/bundler/bundler/gem_helper_spec.rb
index 2c43719aa1..f1bb9861cf 100644
--- a/spec/bundler/bundler/gem_helper_spec.rb
+++ b/spec/bundler/bundler/gem_helper_spec.rb
@@ -169,6 +169,12 @@ RSpec.describe Bundler::GemHelper do
     end
 
     describe "#build_checksum" do
+      it "calculates SHA512 of the content" do
+        subject.build_checksum(Pathname(IO::NULL))
+        sha_path = app_path.join("checksums", "#{File.basename(IO::NULL)}.sha512")
+        expect(File.read(sha_path)).to eql(Digest::SHA512.hexdigest(""))
+      end
+
       context "when build was successful" do
         it "creates .sha512 file" do
           mock_build_message app_name, app_version