1 files changed, 104 insertions, 0 deletions
diff --git a/activerecord/test/cases/relation/delete_all_test.rb b/activerecord/test/cases/relation/delete_all_test.rb
new file mode 100644
index 0000000000..446d7621ea
--- /dev/null
+++ b/activerecord/test/cases/relation/delete_all_test.rb
@@ -0,0 +1,104 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/author"
+require "models/post"
+require "models/pet"
+require "models/toy"
+
+class DeleteAllTest < ActiveRecord::TestCase
+  fixtures :authors, :author_addresses, :posts, :pets, :toys
+
+  def test_destroy_all
+    davids = Author.where(name: "David")
+
+    # Force load
+    assert_equal [authors(:david)], davids.to_a
+    assert_predicate davids, :loaded?
+
+    assert_difference("Author.count", -1) do
+      destroyed = davids.destroy_all
+      assert_equal [authors(:david)], destroyed
+      assert_predicate destroyed.first, :frozen?
+    end
+
+    assert_equal [], davids.to_a
+    assert_predicate davids, :loaded?
+  end
+
+  def test_delete_all
+    davids = Author.where(name: "David")
+
+    assert_difference("Author.count", -1) { davids.delete_all }
+    assert_not_predicate davids, :loaded?
+  end
+
+  def test_delete_all_loaded
+    davids = Author.where(name: "David")
+
+    # Force load
+    assert_equal [authors(:david)], davids.to_a
+    assert_predicate davids, :loaded?
+
+    assert_difference("Author.count", -1) { davids.delete_all }
+
+    assert_equal [], davids.to_a
+    assert_predicate davids, :loaded?
+  end
+
+  def test_delete_all_with_unpermitted_relation_raises_error
+    assert_raises(ActiveRecord::ActiveRecordError) { Author.distinct.delete_all }
+    assert_raises(ActiveRecord::ActiveRecordError) { Author.group(:name).delete_all }
+    assert_raises(ActiveRecord::ActiveRecordError) { Author.having("SUM(id) < 3").delete_all }
+  end
+
+  def test_delete_all_with_joins_and_where_part_is_hash
+    pets = Pet.joins(:toys).where(toys: { name: "Bone" })
+
+    assert_equal true, pets.exists?
+    assert_equal pets.count, pets.delete_all
+  end
+
+  def test_delete_all_with_joins_and_where_part_is_not_hash
+    pets = Pet.joins(:toys).where("toys.name = ?", "Bone")
+
+    assert_equal true, pets.exists?
+    assert_equal pets.count, pets.delete_all
+  end
+
+  def test_delete_all_with_left_joins
+    pets = Pet.left_joins(:toys).where(toys: { name: "Bone" })
+
+    assert_equal true, pets.exists?
+    assert_equal pets.count, pets.delete_all
+  end
+
+  def test_delete_all_with_includes
+    pets = Pet.includes(:toys).where(toys: { name: "Bone" })
+
+    assert_equal true, pets.exists?
+    assert_equal pets.count, pets.delete_all
+  end
+
+  unless current_adapter?(:OracleAdapter)
+    def test_delete_all_with_order_and_limit_deletes_subset_only
+      author = authors(:david)
+      limited_posts = Post.where(author: author).order(:id).limit(1)
+      assert_equal 1, limited_posts.size
+      assert_equal 2, limited_posts.limit(2).size
+      assert_equal 1, limited_posts.delete_all
+      assert_raise(ActiveRecord::RecordNotFound) { posts(:welcome) }
+      assert posts(:thinking)
+    end
+
+    def test_delete_all_with_order_and_limit_and_offset_deletes_subset_only
+      author = authors(:david)
+      limited_posts = Post.where(author: author).order(:id).limit(1).offset(1)
+      assert_equal 1, limited_posts.size
+      assert_equal 2, limited_posts.limit(2).size
+      assert_equal 1, limited_posts.delete_all
+      assert_raise(ActiveRecord::RecordNotFound) { posts(:thinking) }
+      assert posts(:welcome)
+    end
+  end
+end