feat: qol improvements

tests/scraper_spec.lua

@@ -0,0 +1,86 @@
+-- Unit tests for web scraping functionality
+describe("cp.scrape", function()
+  local scrape
+  local mock_responses = {}
+
+  before_each(function()
+    scrape = require("cp.scrape")
+
+    -- Mock HTTP responses for different platforms
+    mock_responses.codeforces_contest = [[
+      <div class="problems">
+        <div class="problem" data-problem-id="A">Problem A</div>
+        <div class="problem" data-problem-id="B">Problem B</div>
+      </div>
+    ]]
+
+    mock_responses.codeforces_problem = [[
+      <div class="input">Sample Input</div>
+      <div class="output">Sample Output</div>
+    ]]
+  end)
+
+  describe("contest metadata scraping", function()
+    it("scrapes Codeforces contest problems", function()
+      -- Mock HTTP request, test problem list extraction
+    end)
+
+    it("scrapes Atcoder contest problems", function()
+      -- Test Atcoder format
+    end)
+
+    it("scrapes CSES problem list", function()
+      -- Test CSES format
+    end)
+
+    it("handles network errors gracefully", function()
+      -- Test error handling for failed requests
+    end)
+
+    it("handles parsing errors gracefully", function()
+      -- Test error handling for malformed HTML
+    end)
+  end)
+
+  describe("problem scraping", function()
+    it("extracts test cases from Codeforces problems", function()
+      -- Test test case extraction
+    end)
+
+    it("handles multiple test cases correctly", function()
+      -- Test multiple sample inputs/outputs
+    end)
+
+    it("handles problems with no sample cases", function()
+      -- Test edge case handling
+    end)
+
+    it("extracts problem metadata (time limits, etc.)", function()
+      -- Test metadata extraction
+    end)
+  end)
+
+  describe("platform-specific parsing", function()
+    it("handles Codeforces HTML structure", function()
+      -- Test Codeforces-specific parsing
+    end)
+
+    it("handles Atcoder HTML structure", function()
+      -- Test Atcoder-specific parsing
+    end)
+
+    it("handles CSES HTML structure", function()
+      -- Test CSES-specific parsing
+    end)
+  end)
+
+  describe("rate limiting and caching", function()
+    it("respects rate limits", function()
+      -- Test rate limiting behavior
+    end)
+
+    it("uses cached results when appropriate", function()
+      -- Test caching integration
+    end)
+  end)
+end)