1 files changed, 165 insertions, 0 deletions
diff --git a/railties/test/new_initializer_test.rb b/railties/test/new_initializer_test.rb
new file mode 100644
index 0000000000..8d9ef7bee3
--- /dev/null
+++ b/railties/test/new_initializer_test.rb
@@ -0,0 +1,165 @@
+require 'abstract_unit'
+require 'active_support/ruby/shim'
+require 'initializer'
+
+class InitializerRunnerTest < ActiveSupport::TestCase
+
+  def setup
+    @runner = Rails::Initializer::Runner.new
+  end
+
+  test "A new runner can be created" do
+    assert @runner
+  end
+
+  test "The initializers actually get run when the runner is run" do
+    state = nil
+
+    @runner.add :foo do
+      run { state = true }
+    end
+
+    @runner.run
+    assert state
+  end
+
+  test "By default, initializers get run in the order that they are added" do
+    state = []
+
+    @runner.add :first do
+      run { state << :first }
+    end
+
+    @runner.add :second do
+      run { state << :second }
+    end
+
+    @runner.run
+    assert_equal [:first, :second], state
+  end
+
+  test "Raises an exception if :before or :after are specified, but don't exist" do
+    assert_raise(Rails::Initializer::Error) do
+      @runner.add(:fail, :before => :whale) { 1 }
+    end
+
+    assert_raise(Rails::Initializer::Error) do
+      @runner.add(:fail, :after => :whale) { 1 }
+    end
+  end
+
+  test "When adding an initializer, specifying :after allows you to move an initializer after another" do
+    state = []
+
+    @runner.add :first do
+      run { state << :first }
+    end
+
+    @runner.add :second do
+      run { state << :second }
+    end
+
+    @runner.add :third, :after => :first do
+      run { state << :third }
+    end
+
+    @runner.run
+    assert_equal [:first, :third, :second], state
+  end
+
+  test "An initializer can be deleted" do
+    state = []
+
+    @runner.add :first do
+      run { state << :first }
+    end
+
+    @runner.add :second do
+      run { state << :second }
+    end
+
+    @runner.delete(:second)
+
+    @runner.run
+    assert_equal [:first], state
+  end
+
+  test "A runner can be initialized with an existing runner, which it copies" do
+    state = []
+
+    @runner.add :first do
+      run { state << :first }
+    end
+
+    @runner.add :second do
+      run { state << :second }
+    end
+
+    Rails::Initializer::Runner.new(@runner).run
+    assert_equal [:first, :second], state
+  end
+
+  test "A child runner can be still be modified without modifying the parent" do
+    state = []
+
+    @runner.add :first do
+      run { state << :first }
+    end
+
+    @runner.add :second do
+      run { state << :second }
+    end
+
+    new_runner = Rails::Initializer::Runner.new(@runner)
+    new_runner.add :trois do
+      run { state << :trois }
+    end
+    new_runner.delete(:second)
+
+    new_runner.run
+    assert_equal [:first, :trois], state
+    state.clear
+    @runner.run
+    assert_equal [:first, :second], state
+  end
+
+  test "A child runner that is modified does not modify any other children of the same parent" do
+    state = []
+
+    @runner.add :first do
+      run { state << :first }
+    end
+
+    @runner.add :second do
+      run { state << :second }
+    end
+
+    child_one = Rails::Initializer::Runner.new(@runner)
+    child_two = Rails::Initializer::Runner.new(@runner)
+
+    child_one.delete(:second)
+    child_two.run
+
+    assert_equal [:first, :second], state
+  end
+
+  test "It does not run the initializer block immediately" do
+    state = []
+    @runner.add :first do
+      state << :first
+    end
+
+    assert_equal [], state
+  end
+
+  test "It runs the block when the runner is run" do
+    state = []
+    @runner.add :first do
+      state << :first
+    end
+
+    @runner.run
+    assert_equal [:first], state
+  end
+
+end
+\ No newline at end of file