1 files changed, 18 insertions, 0 deletions
diff --git a/activestorage/test/models/filename_test.rb b/activestorage/test/models/filename_test.rb
index f1e4a467ba..88405e41c0 100644
--- a/activestorage/test/models/filename_test.rb
+++ b/activestorage/test/models/filename_test.rb
@@ -3,6 +3,24 @@
 require "test_helper"
 
 class ActiveStorage::FilenameTest < ActiveSupport::TestCase
+  test "base" do
+    assert_equal "racecar", ActiveStorage::Filename.new("racecar.jpg").base
+    assert_equal "race.car", ActiveStorage::Filename.new("race.car.jpg").base
+    assert_equal "racecar", ActiveStorage::Filename.new("racecar").base
+  end
+
+  test "extension with delimiter" do
+    assert_equal ".jpg", ActiveStorage::Filename.new("racecar.jpg").extension_with_delimiter
+    assert_equal ".jpg", ActiveStorage::Filename.new("race.car.jpg").extension_with_delimiter
+    assert_equal "", ActiveStorage::Filename.new("racecar").extension_with_delimiter
+  end
+
+  test "extension without delimiter" do
+    assert_equal "jpg", ActiveStorage::Filename.new("racecar.jpg").extension_without_delimiter
+    assert_equal "jpg", ActiveStorage::Filename.new("race.car.jpg").extension_without_delimiter
+    assert_equal "", ActiveStorage::Filename.new("racecar").extension_without_delimiter
+  end
+
   test "sanitize" do
     "%$|:;/\t\r\n\\".each_char do |character|
       filename = ActiveStorage::Filename.new("foo#{character}bar.pdf")