1 files changed, 136 insertions, 0 deletions
diff --git a/spec/finders/packages/build_infos_for_many_packages_finder_spec.rb b/spec/finders/packages/build_infos_for_many_packages_finder_spec.rb
new file mode 100644
index 00000000000..f3c79d0c825
--- /dev/null
+++ b/spec/finders/packages/build_infos_for_many_packages_finder_spec.rb
@@ -0,0 +1,136 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ::Packages::BuildInfosForManyPackagesFinder do
+  using RSpec::Parameterized::TableSyntax
+
+  let_it_be(:package) { create(:package) }
+  let_it_be(:build_infos) { create_list(:package_build_info, 5, :with_pipeline, package: package) }
+  let_it_be(:build_info_with_empty_pipeline) { create(:package_build_info, package: package) }
+
+  let_it_be(:other_package) { create(:package) }
+  let_it_be(:other_build_infos) { create_list(:package_build_info, 5, :with_pipeline, package: other_package) }
+  let_it_be(:other_build_info_with_empty_pipeline) { create(:package_build_info, package: other_package) }
+
+  let_it_be(:all_build_infos) { build_infos + other_build_infos }
+
+  let(:finder) { described_class.new(packages, params) }
+  let(:packages) { nil }
+  let(:first) { nil }
+  let(:last) { nil }
+  let(:after) { nil }
+  let(:before) { nil }
+  let(:max_page_size) { nil }
+  let(:support_next_page) { false }
+  let(:params) do
+    {
+      first: first,
+      last: last,
+      after: after,
+      before: before,
+      max_page_size: max_page_size,
+      support_next_page: support_next_page
+    }
+  end
+
+  describe '#execute' do
+    subject { finder.execute }
+
+    shared_examples 'returning the expected build infos' do
+      let(:expected_build_infos) do
+        expected_build_infos_indexes.map do |idx|
+          all_build_infos[idx]
+        end
+      end
+
+      let(:after) do
+        all_build_infos[after_index].pipeline_id if after_index
+      end
+
+      let(:before) do
+        all_build_infos[before_index].pipeline_id if before_index
+      end
+
+      it { is_expected.to eq(expected_build_infos) }
+    end
+
+    context 'with nil packages' do
+      let(:packages) { nil }
+
+      it { is_expected.to be_empty }
+    end
+
+    context 'with [] packages' do
+      let(:packages) { [] }
+
+      it { is_expected.to be_empty }
+    end
+
+    context 'with empy scope packages' do
+      let(:packages) { Packages::Package.none }
+
+      it { is_expected.to be_empty }
+    end
+
+    context 'with a single package' do
+      let(:packages) { package.id }
+
+      # rubocop: disable Layout/LineLength
+      where(:first, :last, :after_index, :before_index, :max_page_size, :support_next_page, :expected_build_infos_indexes) do
+        # F   L     AI    BI    MPS   SNP
+        nil | nil | nil | nil | nil | false | [4, 3, 2, 1, 0]
+        nil | nil | nil | nil | 10  | false | [4, 3, 2, 1, 0]
+        nil | nil | nil | nil | 2   | false | [4, 3]
+        2   | nil | nil | nil | nil | false | [4, 3]
+        2   | nil | nil | nil | nil | true  | [4, 3, 2]
+        2   | nil | 3   | nil | nil | false | [2, 1]
+        2   | nil | 3   | nil | nil | true  | [2, 1, 0]
+        3   | nil | 4   | nil | 2   | false | [3, 2]
+        3   | nil | 4   | nil | 2   | true  | [3, 2, 1]
+        nil | 2   | nil | nil | nil | false | [1, 0]
+        nil | 2   | nil | nil | nil | true  | [2, 1, 0]
+        nil | 2   | nil | 1   | nil | false | [3, 2]
+        nil | 2   | nil | 1   | nil | true  | [4, 3, 2]
+        nil | 3   | nil | 0   | 2   | false | [2, 1]
+        nil | 3   | nil | 0   | 2   | true  | [3, 2, 1]
+      end
+      # rubocop: enable Layout/LineLength
+
+      with_them do
+        it_behaves_like 'returning the expected build infos'
+      end
+    end
+
+    context 'with many packages' do
+      let(:packages) { [package.id, other_package.id] }
+
+      # using after_index/before_index when receiving multiple packages doesn't
+      # make sense but we still verify here that the behavior is coherent.
+      # rubocop: disable Layout/LineLength
+      where(:first, :last, :after_index, :before_index, :max_page_size, :support_next_page, :expected_build_infos_indexes) do
+        # F   L     AI    BI    MPS   SNP
+        nil | nil | nil | nil | nil | false | [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
+        nil | nil | nil | nil | 10  | false | [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
+        nil | nil | nil | nil | 2   | false | [9, 8, 4, 3]
+        2   | nil | nil | nil | nil | false | [9, 8, 4, 3]
+        2   | nil | nil | nil | nil | true  | [9, 8, 7, 4, 3, 2]
+        2   | nil | 3   | nil | nil | false | [2, 1]
+        2   | nil | 3   | nil | nil | true  | [2, 1, 0]
+        3   | nil | 4   | nil | 2   | false | [3, 2]
+        3   | nil | 4   | nil | 2   | true  | [3, 2, 1]
+        nil | 2   | nil | nil | nil | false | [6, 5, 1, 0]
+        nil | 2   | nil | nil | nil | true  | [7, 6, 5, 2, 1, 0]
+        nil | 2   | nil | 1   | nil | false | [6, 5, 3, 2]
+        nil | 2   | nil | 1   | nil | true  | [7, 6, 5, 4, 3, 2]
+        nil | 3   | nil | 0   | 2   | false | [6, 5, 2, 1]
+        nil | 3   | nil | 0   | 2   | true  | [7, 6, 5, 3, 2, 1]
+      end
+
+      with_them do
+        it_behaves_like 'returning the expected build infos'
+      end
+      # rubocop: enable Layout/LineLength
+    end
+  end
+end