1 files changed, 55 insertions, 0 deletions
diff --git a/spec/bundler/bundler/compact_index_client/updater_spec.rb b/spec/bundler/bundler/compact_index_client/updater_spec.rb
new file mode 100644
index 0000000000..fd554a7b0d
--- /dev/null
+++ b/spec/bundler/bundler/compact_index_client/updater_spec.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require "net/http"
+require "bundler/compact_index_client"
+require "bundler/compact_index_client/updater"
+
+RSpec.describe Bundler::CompactIndexClient::Updater do
+  let(:fetcher) { double(:fetcher) }
+  let(:local_path) { Pathname("/tmp/localpath") }
+  let(:remote_path) { double(:remote_path) }
+
+  subject(:updater) { described_class.new(fetcher) }
+
+  context "when the ETag header is missing" do
+    # Regression test for https://github.com/bundler/bundler/issues/5463
+
+    let(:response) { double(:response, :body => "") }
+
+    it "MisMatchedChecksumError is raised" do
+      # Twice: #update retries on failure
+      expect(response).to receive(:[]).with("Content-Encoding").twice { "" }
+      expect(response).to receive(:[]).with("ETag").twice { nil }
+      expect(fetcher).to receive(:call).twice { response }
+
+      expect do
+        updater.update(local_path, remote_path)
+      end.to raise_error(Bundler::CompactIndexClient::Updater::MisMatchedChecksumError)
+    end
+  end
+
+  context "when the download is corrupt" do
+    let(:response) { double(:response, :body => "") }
+
+    it "raises HTTPError" do
+      expect(response).to receive(:[]).with("Content-Encoding") { "gzip" }
+      expect(fetcher).to receive(:call) { response }
+
+      expect do
+        updater.update(local_path, remote_path)
+      end.to raise_error(Bundler::HTTPError)
+    end
+  end
+
+  context "when bundler doesn't have permissions on Dir.tmpdir" do
+    let(:response) { double(:response, :body => "") }
+
+    it "Errno::EACCES is raised" do
+      allow(Dir).to receive(:mktmpdir) { raise Errno::EACCES }
+
+      expect do
+        updater.update(local_path, remote_path)
+      end.to raise_error(Bundler::PermissionError)
+    end
+  end
+end