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