1 files changed, 128 insertions, 0 deletions
diff --git a/activemodel/test/cases/validations/conditional_validation_test.rb b/activemodel/test/cases/validations/conditional_validation_test.rb
new file mode 100644
index 0000000000..1704db9a48
--- /dev/null
+++ b/activemodel/test/cases/validations/conditional_validation_test.rb
@@ -0,0 +1,128 @@
+# frozen_string_literal: true
+
+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_predicate t, :invalid?
+    assert_predicate t.errors[:title], :any?
+    assert_equal ["hoo 5"], t.errors["title"]
+  end
+
+  def test_if_validation_using_array_of_true_methods
+    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: [:condition_is_true, :condition_is_true])
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate t, :invalid?
+    assert_predicate t.errors[:title], :any?
+    assert_equal ["hoo 5"], t.errors["title"]
+  end
+
+  def test_unless_validation_using_array_of_false_methods
+    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", unless: [:condition_is_false, :condition_is_false])
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate t, :invalid?
+    assert_predicate 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_predicate t, :valid?
+    assert_empty t.errors[:title]
+  end
+
+  def test_if_validation_using_array_of_true_and_false_methods
+    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: [:condition_is_true, :condition_is_false])
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate t, :valid?
+    assert_empty t.errors[:title]
+  end
+
+  def test_unless_validation_using_array_of_true_and_felse_methods
+    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", unless: [:condition_is_true, :condition_is_false])
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate 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_false)
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate 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_false)
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate t, :invalid?
+    assert_predicate 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_predicate t, :invalid?
+    assert_predicate 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_predicate 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_predicate 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_predicate t, :invalid?
+    assert_predicate t.errors[:title], :any?
+    assert_equal ["hoo 5"], t.errors["title"]
+  end
+
+  def test_validation_using_conbining_if_true_and_unless_true_conditions
+    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: :condition_is_true, unless: :condition_is_true)
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate t, :valid?
+    assert_empty t.errors[:title]
+  end
+
+  def test_validation_using_conbining_if_true_and_unless_false_conditions
+    Topic.validates_length_of(:title, maximum: 5, too_long: "hoo %{count}", if: :condition_is_true, unless: :condition_is_false)
+    t = Topic.new("title" => "uhohuhoh", "content" => "whatever")
+    assert_predicate t, :invalid?
+    assert_predicate t.errors[:title], :any?
+    assert_equal ["hoo 5"], t.errors["title"]
+  end
+end