From 65e154f33b54acf40b51082fc5b681ba605015d9 Mon Sep 17 00:00:00 2001
From: Marc-Andre Lafortune <github@marc-andre.ca>
Date: Mon, 6 Aug 2012 22:25:01 -0400
Subject: Allow revert of whole migration [#8267]

---
 .../test/cases/invertible_migration_test.rb        | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)

(limited to 'activerecord/test/cases/invertible_migration_test.rb')

diff --git a/activerecord/test/cases/invertible_migration_test.rb b/activerecord/test/cases/invertible_migration_test.rb
index 6d285e23d7..6b81e600af 100644
--- a/activerecord/test/cases/invertible_migration_test.rb
+++ b/activerecord/test/cases/invertible_migration_test.rb
@@ -51,6 +51,23 @@ module ActiveRecord
       end
     end
 
+    class RevertWholeMigration < SilentMigration
+      def initialize(name = self.class.name, version = nil, migration)
+        @migration = migration
+        super(name, version)
+      end
+
+      def change
+        revert @migration
+      end
+    end
+
+    class NestedRevertWholeMigration < RevertWholeMigration
+      def change
+        revert { super }
+      end
+    end
+
     def teardown
       if ActiveRecord::Base.connection.table_exists?("horses")
         ActiveRecord::Base.connection.drop_table("horses")
@@ -90,6 +107,52 @@ module ActiveRecord
       assert !migration.connection.table_exists?("horses")
     end
 
+    def test_migrate_revert_whole_migration
+      migration = InvertibleMigration.new
+      [LegacyMigration, InvertibleMigration].each do |klass|
+        revert = RevertWholeMigration.new(klass)
+        migration.migrate :up
+        revert.migrate :up
+        assert !migration.connection.table_exists?("horses")
+        revert.migrate :down
+        assert migration.connection.table_exists?("horses")
+        migration.migrate :down
+        assert !migration.connection.table_exists?("horses")
+      end
+    end
+
+    def test_migrate_nested_revert_whole_migration
+      revert = NestedRevertWholeMigration.new(InvertibleRevertMigration)
+      revert.migrate :down
+      assert revert.connection.table_exists?("horses")
+      revert.migrate :up
+      assert !revert.connection.table_exists?("horses")
+    end
+
+    def test_revert_order
+      block = Proc.new{|t| t.string :name }
+      recorder = ActiveRecord::Migration::CommandRecorder.new(ActiveRecord::Base.connection)
+      recorder.instance_eval do
+        create_table("apples", &block)
+        revert do
+          create_table("bananas", &block)
+          revert do
+            create_table("clementines")
+            create_table("dates")
+          end
+          create_table("elderberries")
+        end
+        revert do
+          create_table("figs")
+          create_table("grapes")
+        end
+      end
+      assert_equal [[:create_table, ["apples"], block], [:drop_table, ["elderberries"]],
+                    [:create_table, ["clementines"], nil], [:create_table, ["dates"], nil],
+                    [:drop_table, ["bananas"]], [:drop_table, ["grapes"]],
+                    [:drop_table, ["figs"]]], recorder.commands
+    end
+
     def test_legacy_up
       LegacyMigration.migrate :up
       assert ActiveRecord::Base.connection.table_exists?("horses"), "horses should exist"
-- 
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