Add latest changes from gitlab-org/gitlab@15-3-stable-eev15.3.0-rc42

1 files changed, 75 insertions, 0 deletions

diff --git a/spec/lib/gitlab/utils/link_header_parser_spec.rb b/spec/lib/gitlab/utils/link_header_parser_spec.rb
new file mode 100644
index 00000000000..e15ef930271
--- /dev/null
+++ b/spec/lib/gitlab/utils/link_header_parser_spec.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+
+RSpec.describe Gitlab::Utils::LinkHeaderParser do
+  let(:parser) { described_class.new(header) }
+
+  describe '#parse' do
+    subject { parser.parse }
+
+    context 'with a valid header' do
+      let(:header) { generate_header(next: 'http://sandbox.org/next') }
+      let(:expected) { { next: { uri: URI('http://sandbox.org/next') } } }
+
+      it { is_expected.to eq(expected) }
+
+      context 'with multiple links' do
+        let(:header) { generate_header(next: 'http://sandbox.org/next', previous: 'http://sandbox.org/previous') }
+        let(:expected) do
+          {
+            next: { uri: URI('http://sandbox.org/next') },
+            previous: { uri: URI('http://sandbox.org/previous') }
+          }
+        end
+
+        it { is_expected.to eq(expected) }
+      end
+
+      context 'with an incomplete uri' do
+        let(:header) { '<http://sandbox.org/next; rel="next"' }
+
+        it { is_expected.to eq({}) }
+      end
+
+      context 'with no rel' do
+        let(:header) { '<http://sandbox.org/next>; direction="next"' }
+
+        it { is_expected.to eq({}) }
+      end
+
+      context 'with multiple rel elements' do
+        # check https://datatracker.ietf.org/doc/html/rfc5988#section-5.3:
+        # occurrences after the first MUST be ignored by parsers
+        let(:header) { '<http://sandbox.org/next>; rel="next"; rel="dummy"' }
+
+        it { is_expected.to eq(expected) }
+      end
+
+      context 'when the url is too long' do
+        let(:header) { "<http://sandbox.org/#{'a' * 500}>; rel=\"next\"" }
+
+        it { is_expected.to eq({}) }
+      end
+    end
+
+    context 'with nil header' do
+      let(:header) { nil }
+
+      it { is_expected.to eq({}) }
+    end
+
+    context 'with empty header' do
+      let(:header) { '' }
+
+      it { is_expected.to eq({}) }
+    end
+
+    def generate_header(links)
+      stringified_links = links.map do |rel, url|
+        "<#{url}>; rel=\"#{rel}\""
+      end
+      stringified_links.join(', ')
+    end
+  end
+end