--- /dev/null
+require "test_helper"
+
+class LeadingWhitespaceValidatable
+ include ActiveModel::Validations
+ validates :string, :leading_whitespace => true
+ attr_accessor :string
+end
+
+class LeadingWhitespaceValidatorTest < ActiveSupport::TestCase
+ include Rails::Dom::Testing::Assertions::SelectorAssertions
+
+ def test_with_leading_whitespace
+ validator = LeadingWhitespaceValidatable.new
+
+ strings = [" ", " test", " ", "\ttest"]
+
+ strings.each do |v|
+ validator.string = v
+ assert_not validator.valid?, "'#{v}' should not be valid"
+ end
+ end
+
+ def test_without_leading_whitespace
+ validator = LeadingWhitespaceValidatable.new
+
+ strings = ["test", "test ", "t est", "test\t", ".test", "_test"]
+
+ strings.each do |v|
+ validator.string = v
+ assert validator.valid?, "'#{v}' should be valid"
+ end
+ end
+end