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;;; test-wttrin-geolocation--parse-ipinfo.el --- Tests for ipinfo.io response parser -*- lexical-binding: t; -*-
;; Copyright (C) 2026 Craig Jennings
;;; Commentary:
;; Unit tests for `wttrin-geolocation--parse-ipinfo'. Pure function — no
;; network, no async.
;;; Code:
(require 'ert)
(require 'wttrin-geolocation)
;;; Setup and Teardown
(defun test-wttrin-geolocation--parse-ipinfo-setup ()
"Setup for ipinfo parser tests."
nil)
(defun test-wttrin-geolocation--parse-ipinfo-teardown ()
"Teardown for ipinfo parser tests."
nil)
;;; Normal Cases
(ert-deftest test-wttrin-geolocation--parse-ipinfo-normal-full-response-returns-formatted-string ()
"A full ipinfo.io response yields \"City, Region\"."
(let ((json "{\"ip\":\"8.8.8.8\",\"city\":\"Mountain View\",\"region\":\"California\",\"country\":\"US\",\"loc\":\"37.3860,-122.0838\",\"org\":\"AS15169 Google LLC\",\"postal\":\"94035\",\"timezone\":\"America/Los_Angeles\"}"))
(should (string= "Mountain View, California"
(wttrin-geolocation--parse-ipinfo json)))))
;;; Boundary Cases
(ert-deftest test-wttrin-geolocation--parse-ipinfo-boundary-minimal-fields-works ()
"A response with only city and region parses correctly."
(let ((json "{\"city\":\"Berlin\",\"region\":\"Berlin\"}"))
(should (string= "Berlin, Berlin"
(wttrin-geolocation--parse-ipinfo json)))))
;;; Error Cases
(ert-deftest test-wttrin-geolocation--parse-ipinfo-error-nil-input-returns-nil ()
"A nil input string returns nil."
(should-not (wttrin-geolocation--parse-ipinfo nil)))
(ert-deftest test-wttrin-geolocation--parse-ipinfo-error-malformed-json-returns-nil ()
"Malformed JSON returns nil rather than signalling."
(should-not (wttrin-geolocation--parse-ipinfo "not json at all")))
(ert-deftest test-wttrin-geolocation--parse-ipinfo-error-missing-city-returns-nil ()
"A response without a city field returns nil."
(let ((json "{\"region\":\"California\",\"country\":\"US\"}"))
(should-not (wttrin-geolocation--parse-ipinfo json))))
(ert-deftest test-wttrin-geolocation--parse-ipinfo-error-missing-region-returns-nil ()
"A response without a region field returns nil."
(let ((json "{\"city\":\"Mountain View\",\"country\":\"US\"}"))
(should-not (wttrin-geolocation--parse-ipinfo json))))
(provide 'test-wttrin-geolocation--parse-ipinfo)
;;; test-wttrin-geolocation--parse-ipinfo.el ends here
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