feat: base testing files

cache_spec.lua

@@ -0,0 +1,55 @@
+-- Unit tests for caching system
+describe('cp.cache', function()
+  local cache
+  local temp_dir
+
+  before_each(function()
+    cache = require('cp.cache')
+    temp_dir = vim.fn.tempname()
+    vim.fn.mkdir(temp_dir, 'p')
+    -- Mock cache directory
+  end)
+
+  after_each(function()
+    -- Clean up temp files
+    vim.fn.delete(temp_dir, 'rf')
+  end)
+
+  describe('contest metadata caching', function()
+    it('stores contest metadata correctly', function()
+      -- Test storing contest data
+    end)
+
+    it('retrieves cached contest metadata', function()
+      -- Test retrieving contest data
+    end)
+
+    it('handles missing cache files gracefully', function()
+      -- Test missing cache behavior
+    end)
+  end)
+
+  describe('test case caching', function()
+    it('stores test cases for problems', function()
+      -- Test test case storage
+    end)
+
+    it('retrieves cached test cases', function()
+      -- Test test case retrieval
+    end)
+
+    it('handles cache invalidation', function()
+      -- Test cache expiry/invalidation
+    end)
+  end)
+
+  describe('cache persistence', function()
+    it('persists cache across sessions', function()
+      -- Test cache file persistence
+    end)
+
+    it('handles corrupted cache files', function()
+      -- Test corrupted cache recovery
+    end)
+  end)
+end)