1 files changed, 113 insertions, 0 deletions
diff --git a/activerecord/test/cases/core_test.rb b/activerecord/test/cases/core_test.rb
new file mode 100644
index 0000000000..6e7ae2efb4
--- /dev/null
+++ b/activerecord/test/cases/core_test.rb
@@ -0,0 +1,113 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/person"
+require "models/topic"
+require "pp"
+
+class NonExistentTable < ActiveRecord::Base; end
+
+class CoreTest < ActiveRecord::TestCase
+  fixtures :topics
+
+  def test_inspect_class
+    assert_equal "ActiveRecord::Base", ActiveRecord::Base.inspect
+    assert_equal "LoosePerson(abstract)", LoosePerson.inspect
+    assert_match(/^Topic\(id: integer, title: string/, Topic.inspect)
+  end
+
+  def test_inspect_instance
+    topic = topics(:first)
+    assert_equal %(#<Topic id: 1, title: "The First Topic", author_name: "David", author_email_address: "david@loudthinking.com", written_on: "#{topic.written_on.to_s(:db)}", bonus_time: "#{topic.bonus_time.to_s(:db)}", last_read: "#{topic.last_read.to_s(:db)}", content: "Have a nice day", important: nil, approved: false, replies_count: 1, unique_replies_count: 0, parent_id: nil, parent_title: nil, type: nil, group: nil, created_at: "#{topic.created_at.to_s(:db)}", updated_at: "#{topic.updated_at.to_s(:db)}">), topic.inspect
+  end
+
+  def test_inspect_new_instance
+    assert_match(/Topic id: nil/, Topic.new.inspect)
+  end
+
+  def test_inspect_limited_select_instance
+    assert_equal %(#<Topic id: 1>), Topic.all.merge!(select: "id", where: "id = 1").first.inspect
+    assert_equal %(#<Topic id: 1, title: "The First Topic">), Topic.all.merge!(select: "id, title", where: "id = 1").first.inspect
+  end
+
+  def test_inspect_class_without_table
+    assert_equal "NonExistentTable(Table doesn't exist)", NonExistentTable.inspect
+  end
+
+  def test_pretty_print_new
+    topic = Topic.new
+    actual = "".dup
+    PP.pp(topic, StringIO.new(actual))
+    expected = <<~PRETTY
+      #<Topic:0xXXXXXX
+       id: nil,
+       title: nil,
+       author_name: nil,
+       author_email_address: "test@test.com",
+       written_on: nil,
+       bonus_time: nil,
+       last_read: nil,
+       content: nil,
+       important: nil,
+       approved: true,
+       replies_count: 0,
+       unique_replies_count: 0,
+       parent_id: nil,
+       parent_title: nil,
+       type: nil,
+       group: nil,
+       created_at: nil,
+       updated_at: nil>
+    PRETTY
+    assert actual.start_with?(expected.split("XXXXXX").first)
+    assert actual.end_with?(expected.split("XXXXXX").last)
+  end
+
+  def test_pretty_print_persisted
+    topic = topics(:first)
+    actual = "".dup
+    PP.pp(topic, StringIO.new(actual))
+    expected = <<~PRETTY
+      #<Topic:0x\\w+
+       id: 1,
+       title: "The First Topic",
+       author_name: "David",
+       author_email_address: "david@loudthinking.com",
+       written_on: 2003-07-16 14:28:11 UTC,
+       bonus_time: 2000-01-01 14:28:00 UTC,
+       last_read: Thu, 15 Apr 2004,
+       content: "Have a nice day",
+       important: nil,
+       approved: false,
+       replies_count: 1,
+       unique_replies_count: 0,
+       parent_id: nil,
+       parent_title: nil,
+       type: nil,
+       group: nil,
+       created_at: [^,]+,
+       updated_at: [^,>]+>
+    PRETTY
+    assert_match(/\A#{expected}\z/, actual)
+  end
+
+  def test_pretty_print_uninitialized
+    topic = Topic.allocate
+    actual = "".dup
+    PP.pp(topic, StringIO.new(actual))
+    expected = "#<Topic:XXXXXX not initialized>\n"
+    assert actual.start_with?(expected.split("XXXXXX").first)
+    assert actual.end_with?(expected.split("XXXXXX").last)
+  end
+
+  def test_pretty_print_overridden_by_inspect
+    subtopic = Class.new(Topic) do
+      def inspect
+        "inspecting topic"
+      end
+    end
+    actual = "".dup
+    PP.pp(subtopic.new, StringIO.new(actual))
+    assert_equal "inspecting topic\n", actual
+  end
+end