1 files changed, 63 insertions, 0 deletions
diff --git a/spec/migrations/20221102090940_create_next_ci_partitions_record_spec.rb b/spec/migrations/20221102090940_create_next_ci_partitions_record_spec.rb
new file mode 100644
index 00000000000..c55e4bcfba7
--- /dev/null
+++ b/spec/migrations/20221102090940_create_next_ci_partitions_record_spec.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe CreateNextCiPartitionsRecord, migration: :gitlab_ci do
+  let(:migration) { described_class.new }
+  let(:partitions) { table(:ci_partitions) }
+
+  describe '#up' do
+    context 'when on sass' do
+      before do
+        allow(Gitlab).to receive(:com?).and_return(true)
+      end
+
+      it 'creates next partitions record and resets the sequence' do
+        expect { migrate! }
+          .to change { partitions.where(id: 101).any? }
+          .from(false).to(true)
+
+        expect { partitions.create! }.not_to raise_error
+      end
+    end
+
+    context 'when self-managed' do
+      before do
+        allow(Gitlab).to receive(:com?).and_return(false)
+      end
+
+      it 'does not create records' do
+        expect { migrate! }.not_to change(partitions, :count)
+      end
+    end
+  end
+
+  describe '#down' do
+    context 'when on sass' do
+      before do
+        allow(Gitlab).to receive(:com?).and_return(true)
+      end
+
+      it 'removes the record' do
+        migrate!
+
+        expect { migration.down }
+          .to change { partitions.where(id: 101).any? }
+          .from(true).to(false)
+      end
+    end
+
+    context 'when self-managed' do
+      before do
+        allow(Gitlab).to receive(:com?).and_return(true, false)
+      end
+
+      it 'does not remove the record' do
+        expect { migrate! }.to change(partitions, :count).by(1)
+
+        expect { migration.down }.not_to change(partitions, :count)
+      end
+    end
+  end
+end