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;;; test-wttrin-additional-url-params.el --- Tests for wttrin-additional-url-params -*- lexical-binding: t; -*-
;; Copyright (C) 2025 Craig Jennings
;;; Commentary:
;; Unit tests for wttrin-additional-url-params function.
;; Tests URL parameter generation with different unit system configurations.
;;; Code:
(require 'ert)
(require 'wttrin)
(require 'testutil-wttrin)
;;; Normal Cases
(ert-deftest test-wttrin-additional-url-params-normal-metric-returns-param ()
"Test that metric unit system returns ?m parameter."
(testutil-wttrin-with-unit-system "m"
(should (equal "?m" (wttrin-additional-url-params)))))
(ert-deftest test-wttrin-additional-url-params-normal-uscs-returns-param ()
"Test that USCS unit system returns ?u parameter."
(testutil-wttrin-with-unit-system "u"
(should (equal "?u" (wttrin-additional-url-params)))))
(ert-deftest test-wttrin-additional-url-params-normal-wind-speed-returns-param ()
"Test that wind speed unit returns ?M parameter."
(testutil-wttrin-with-unit-system "M"
(should (equal "?M" (wttrin-additional-url-params)))))
;;; Boundary Cases
(ert-deftest test-wttrin-additional-url-params-boundary-nil-returns-question-mark ()
"Test that nil unit system returns just ? parameter."
(testutil-wttrin-with-unit-system nil
(should (equal "?" (wttrin-additional-url-params)))))
(ert-deftest test-wttrin-additional-url-params-boundary-empty-string-returns-question-mark ()
"Test that empty string unit system returns just ? parameter."
(testutil-wttrin-with-unit-system ""
(should (equal "?" (wttrin-additional-url-params)))))
(ert-deftest test-wttrin-additional-url-params-boundary-single-char-returns-param ()
"Test that single character unit system returns ?<char> parameter."
(testutil-wttrin-with-unit-system "x"
(should (equal "?x" (wttrin-additional-url-params)))))
;;; Error Cases
(ert-deftest test-wttrin-additional-url-params-error-number-signals-error ()
"Test that number unit system signals a type error."
;; concat requires string or sequence, number causes wrong-type-argument error
(testutil-wttrin-with-unit-system 123
(should-error (wttrin-additional-url-params)
:type 'wrong-type-argument)))
(provide 'test-wttrin-additional-url-params)
;;; test-wttrin-additional-url-params.el ends here
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