rails/activemodel/test/cases/validations/conditional_validation_test.rb

# encoding: utf-8
require 'cases/helper'

require 'models/topic'

class ConditionalValidationTest < ActiveModel::TestCase

  def teardown
    Topic.clear_validators!
  end

  def test_if_validation_using_method_true
    # When the method returns true
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: :condition_is_true)
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.invalid?
    assert t.errors[:title].any?
    assert_equal ["hoo 5"], t.errors["title"]
  end

  def test_unless_validation_using_method_true
    # When the method returns true
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", unless: :condition_is_true)
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.valid?
    assert_empty t.errors[:title]
  end

  def test_if_validation_using_method_false
    # When the method returns false
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: :condition_is_true_but_its_not)
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.valid?
    assert_empty t.errors[:title]
  end

  def test_unless_validation_using_method_false
    # When the method returns false
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", unless: :condition_is_true_but_its_not)
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.invalid?
    assert t.errors[:title].any?
    assert_equal ["hoo 5"], t.errors["title"]
  end

  def test_if_validation_using_string_true
    # When the evaluated string returns true
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: "a = 1; a == 1")
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.invalid?
    assert t.errors[:title].any?
    assert_equal ["hoo 5"], t.errors["title"]
  end

  def test_unless_validation_using_string_true
    # When the evaluated string returns true
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", unless: "a = 1; a == 1")
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.valid?
    assert_empty t.errors[:title]
  end

  def test_if_validation_using_string_false
    # When the evaluated string returns false
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: "false")
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.valid?
    assert_empty t.errors[:title]
  end

  def test_unless_validation_using_string_false
    # When the evaluated string returns false
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", unless: "false")
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.invalid?
    assert t.errors[:title].any?
    assert_equal ["hoo 5"], t.errors["title"]
  end

  def test_if_validation_using_block_true
    # When the block returns true
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}",
      if: Proc.new { |r| r.content.size > 4 })
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.invalid?
    assert t.errors[:title].any?
    assert_equal ["hoo 5"], t.errors["title"]
  end

  def test_unless_validation_using_block_true
    # When the block returns true
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}",
      unless: Proc.new { |r| r.content.size > 4 })
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.valid?
    assert_empty t.errors[:title]
  end

  def test_if_validation_using_block_false
    # When the block returns false
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}",
      if: Proc.new { |r| r.title != "uhohuhoh"})
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.valid?
    assert_empty t.errors[:title]
  end

  def test_unless_validation_using_block_false
    # When the block returns false
    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}",
      unless: Proc.new { |r| r.title != "uhohuhoh"} )
    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
    assert t.invalid?
    assert t.errors[:title].any?
    assert_equal ["hoo 5"], t.errors["title"]
  end

  # previous implementation of validates_presence_of eval'd the
  # string with the wrong binding, this regression test is to
  # ensure that it works correctly
  def test_validation_with_if_as_string
    Topic.validates_presence_of(:title)
    Topic.validates_presence_of(:author_name, if: "title.to_s.match('important')")

    t = Topic.new
    assert t.invalid?, "A topic without a title should not be valid"
    assert_empty t.errors[:author_name], "A topic without an 'important' title should not require an author"

    t.title = "Just a title"
    assert t.valid?, "A topic with a basic title should be valid"

    t.title = "A very important title"
    assert t.invalid?, "A topic with an important title, but without an author, should not be valid"
    assert t.errors[:author_name].any?, "A topic with an 'important' title should require an author"

    t.author_name = "Hubert J. Farnsworth"
    assert t.valid?, "A topic with an important title and author should be valid"
  end
end