--- /dev/null
+require "test_helper"
+
+class TrailingWhitespaceValidatable
+ include ActiveModel::Validations
+ validates :string, :trailing_whitespace => true
+ attr_accessor :string
+end
+
+class TrailingWhitespaceValidatorTest < ActiveSupport::TestCase
+ include Rails::Dom::Testing::Assertions::SelectorAssertions
+
+ def test_with_trailing_whitespace
+ validator = TrailingWhitespaceValidatable.new
+
+ strings = [" ", "test ", " ", "test\t", "_test_ "]
+
+ strings.each do |v|
+ validator.string = v
+ assert_not validator.valid?, "'#{v}' should not be valid"
+ end
+ end
+
+ def test_without_trailing_whitespace
+ validator = TrailingWhitespaceValidatable.new
+
+ strings = ["test", " test", "tes t", "\ttest", "test.", "test_"]
+
+ strings.each do |v|
+ validator.string = v
+ assert validator.valid?, "'#{v}' should be valid"
+ end
+ end
+end