1 files changed, 35 insertions, 0 deletions
diff --git a/spec/lib/click_house/sync_cursor_spec.rb b/spec/lib/click_house/sync_cursor_spec.rb
new file mode 100644
index 00000000000..43ffaa76e1d
--- /dev/null
+++ b/spec/lib/click_house/sync_cursor_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ClickHouse::SyncCursor, feature_category: :value_stream_management, click_house: {} do
+  def value
+    ClickHouse::SyncCursor.cursor_for(:my_table)
+  end
+
+  context 'when cursor is empty' do
+    it 'returns the default value: 0' do
+      expect(value).to eq(0)
+    end
+  end
+
+  context 'when cursor is present' do
+    it 'updates and returns the current cursor value' do
+      described_class.update_cursor_for(:my_table, 1111)
+
+      expect(value).to eq(1111)
+
+      described_class.update_cursor_for(:my_table, 2222)
+
+      expect(value).to eq(2222)
+    end
+  end
+
+  context 'when updating a different cursor' do
+    it 'does not affect the other cursors' do
+      described_class.update_cursor_for(:other_table, 1111)
+
+      expect(value).to eq(0)
+    end
+  end
+end