1 files changed, 50 insertions, 0 deletions
diff --git a/activerecord/test/cases/migration/pending_migrations_test.rb b/activerecord/test/cases/migration/pending_migrations_test.rb
new file mode 100644
index 0000000000..eff000e1a4
--- /dev/null
+++ b/activerecord/test/cases/migration/pending_migrations_test.rb
@@ -0,0 +1,50 @@
+require 'cases/helper'
+require "minitest/mock"
+
+module ActiveRecord
+  class Migration
+    class PendingMigrationsTest < ActiveRecord::TestCase
+      def setup
+        super
+        @connection = MiniTest::Mock.new
+        @app = MiniTest::Mock.new
+        @pending = CheckPending.new(@app, @connection)
+        @pending.instance_variable_set :@last_check, -1 # Force checking
+      end
+
+      def teardown
+        super
+        assert @connection.verify
+        assert @app.verify
+      end
+
+      def test_errors_if_pending
+        @connection.expect :supports_migrations?, true
+
+        ActiveRecord::Migrator.stub :needs_migration?, true do
+          assert_raise ActiveRecord::PendingMigrationError do
+            @pending.call(nil)
+          end
+        end
+      end
+
+      def test_checks_if_supported
+        @connection.expect :supports_migrations?, true
+        @app.expect :call, nil, [:foo]
+
+        ActiveRecord::Migrator.stub :needs_migration?, false do
+          @pending.call(:foo)
+        end
+      end
+
+      def test_doesnt_check_if_unsupported
+        @connection.expect :supports_migrations?, false
+        @app.expect :call, nil, [:foo]
+
+        ActiveRecord::Migrator.stub :needs_migration?, true do
+          @pending.call(:foo)
+        end
+      end
+    end
+  end
+end