commit a4e6fc5b77b011148209bb3ecc61550d440d0419
Author: Marius BĂLTEANU <marius.balteanu@zitec.com>
Date:   Tue Feb 3 08:50:05 2026 +0700

    Allow active theme to override default icons by providing an icons.svg in their theme (#43087).

diff --git a/test/helpers/icons_helper_test.rb b/test/helpers/icons_helper_test.rb
index 7ef071f86..21febc58c 100644
--- a/test/helpers/icons_helper_test.rb
+++ b/test/helpers/icons_helper_test.rb
@@ -132,4 +132,37 @@ class IconsHelperTest < Redmine::HelperTest
   def test_icon_for_mime_type_should_return_generic_file_icon_for_unknown_mime_types
     assert_equal 'file', icon_for_mime_type('unknown-type')
   end
+
+  def test_sprite_source_without_theme_should_return_default_sprite
+    stubs(:current_theme).returns(nil)
+
+    assert_equal "icons.svg", sprite_source
+  end
+
+  def test_sprite_source_with_theme_and_sprite_image_should_return_theme_path
+    theme = mock('theme')
+    theme.stubs(:images).returns(['icons.svg'])
+    theme.stubs(:image_path).with('icons.svg').returns('themes/test/icons.svg')
+    stubs(:current_theme).returns(theme)
+
+    assert_equal "themes/test/icons.svg", sprite_source
+  end
+
+  def test_sprite_source_with_theme_without_sprite_image_should_return_default_sprite
+    theme = mock('theme')
+    theme.stubs(:images).returns([])
+    stubs(:current_theme).returns(theme)
+
+    assert_equal "icons.svg", sprite_source
+  end
+
+  def test_sprite_icon_with_theme_override_should_use_theme_sprite
+    theme = mock('theme')
+    theme.stubs(:images).returns(['icons.svg'])
+    theme.stubs(:image_path).with('icons.svg').returns('themes/test/icons.svg')
+    stubs(:current_theme).returns(theme)
+
+    expected = %r{<svg class="s18 icon-svg" aria-hidden="true"><use href="/assets/themes/test/icons.svg#icon--edit"></use></svg>$}
+    assert_match expected, sprite_icon('edit')
+  end
 end