fix(test): move to spec

spec/config_spec.lua

@@ -0,0 +1,89 @@
+describe('cp.config', function()
+  local config
+
+  before_each(function()
+    config = require('cp.config')
+  end)
+
+  describe('setup', function()
+    it('returns defaults with nil input', function()
+      local result = config.setup()
+
+      assert.equals('table', type(result.contests))
+      assert.equals('table', type(result.snippets))
+      assert.equals('table', type(result.hooks))
+      assert.equals('table', type(result.scrapers))
+      assert.is_false(result.debug)
+      assert.is_nil(result.filename)
+    end)
+
+    it('merges user config with defaults', function()
+      local user_config = {
+        debug = true,
+        contests = { test_contest = { cpp = { extension = 'cpp' } } },
+      }
+
+      local result = config.setup(user_config)
+
+      assert.is_true(result.debug)
+      assert.equals('table', type(result.contests.test_contest))
+      assert.equals('table', type(result.scrapers))
+    end)
+
+    it('validates extension against supported filetypes', function()
+      local invalid_config = {
+        contests = {
+          test_contest = {
+            cpp = { extension = 'invalid' },
+          },
+        },
+      }
+
+      assert.has_error(function()
+        config.setup(invalid_config)
+      end)
+    end)
+
+    it('validates scraper platforms', function()
+      local invalid_config = {
+        scrapers = { invalid_platform = true },
+      }
+
+      assert.has_error(function()
+        config.setup(invalid_config)
+      end)
+    end)
+
+    it('validates scraper values are booleans', function()
+      local invalid_config = {
+        scrapers = { atcoder = 'not_boolean' },
+      }
+
+      assert.has_error(function()
+        config.setup(invalid_config)
+      end)
+    end)
+
+    it('validates hook functions', function()
+      local invalid_config = {
+        hooks = { before_run = 'not_a_function' },
+      }
+
+      assert.has_error(function()
+        config.setup(invalid_config)
+      end)
+    end)
+  end)
+
+  describe('default_filename', function()
+    it('generates lowercase contest filename', function()
+      local result = config.default_filename('ABC123')
+      assert.equals('abc123', result)
+    end)
+
+    it('combines contest and problem ids', function()
+      local result = config.default_filename('ABC123', 'A')
+      assert.equals('abc123a', result)
+    end)
+  end)
+end)