refactor: tests: standardize naming, consolidate files, and expand testutil

- Expand testutil-wttrin.el with shared fixtures and macros
  (testutil-wttrin-with-clean-weather-buffer,
  testutil-wttrin-mock-http-response, sample ANSI/weather constants)
- Consolidate cache tests: port unique tests from cleanup-cache-constants
  and cleanup-cache-refactored into cleanup-cache-if-needed, delete
  obsolete files
- Extract startup-delay tests into dedicated file
- Add setup/teardown and (require 'testutil-wttrin) to all test files
- Rename all 160 tests to follow
  test-<module>-<category>-<scenario>-<expected-result> convention
- Rename integration test file and add detailed docstrings
- Update Makefile glob to discover new integration test naming pattern

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/test-wttrin-additional-url-params.el b/tests/test-wttrin-additional-url-params.el
index d3cb369..63f87a5 100644
--- a/tests/test-wttrin-additional-url-params.el
+++ b/tests/test-wttrin-additional-url-params.el
@@ -10,6 +10,17 @@
 
 (require 'ert)
 (require 'wttrin)
+(require 'testutil-wttrin)
+
+;;; Setup and Teardown
+
+(defun test-wttrin-additional-url-params-setup ()
+  "Setup for additional-url-params tests."
+  (testutil-wttrin-setup))
+
+(defun test-wttrin-additional-url-params-teardown ()
+  "Teardown for additional-url-params tests."
+  (testutil-wttrin-teardown))
 
 ;;; Normal Cases