test: cover wttrin--reset-font-height

Restores the base height when a remap cookie exists, no-op without one.

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/test-wttrin--reset-font-height.el b/tests/test-wttrin--reset-font-height.el
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+++ b/tests/test-wttrin--reset-font-height.el
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+;;; test-wttrin--reset-font-height.el --- Tests for the base-font reset -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2024-2026 Craig Jennings
+
+;;; Commentary:
+;; wttrin--reset-font-height re-applies the base wttrin-font-height, used for the
+;; loading placeholder so it does not keep the previous weather's auto-fitted
+;; (possibly capped) size.
+
+;;; Code:
+
+(require 'ert)
+(require 'wttrin)
+(require 'testutil-wttrin)
+
+(ert-deftest test-wttrin--reset-font-height-normal-restores-base ()
+  "Normal: resetting restores the applied height to the base wttrin-font-height."
+  (with-temp-buffer
+    (setq-local wttrin--face-remap-cookie
+                (face-remap-add-relative 'default :height 200))
+    (setq-local wttrin--current-font-height 200)
+    (let ((wttrin-font-height 130))
+      (wttrin--reset-font-height)
+      (should (= 130 wttrin--current-font-height)))))
+
+(ert-deftest test-wttrin--reset-font-height-boundary-no-cookie-is-noop ()
+  "Boundary: with no remap cookie, reset is a no-op and does not signal."
+  (with-temp-buffer
+    (setq-local wttrin--face-remap-cookie nil)
+    (setq-local wttrin--current-font-height 200)
+    (wttrin--reset-font-height)
+    (should (= 200 wttrin--current-font-height))))
+
+(provide 'test-wttrin--reset-font-height)
+;;; test-wttrin--reset-font-height.el ends here