Add test for the composite command

test/models/command/composite_test.rb

@@ -0,0 +1,52 @@
+require "test_helper"
+
+class Command::CompositeTest < ActionDispatch::IntegrationTest
+  include CommandTestHelper
+
+  test "execute commands in order and return an array with the results" do
+    command = Command::Composite.new(commands: [ build_command(result: "1"), build_command(result: "2") ])
+    assert_equal [ "1", "2" ], command.execute
+  end
+
+  test "undo the commands in reverse order" do
+    command = Command::Composite.new(commands: [ build_command(result: "1", undoable: true), build_command(result: "2", undoable: true) ])
+    assert_equal [ "2", "1" ], command.undo
+  end
+
+  test "undoable if some of the commands is" do
+    assert_not Command::Composite.new(commands: [ build_command(undoable: false), build_command(undoable: false) ]).undoable?
+    assert Command::Composite.new(commands: [ build_command(undoable: true), build_command(undoable: false) ]).undoable?
+  end
+
+  test "needs confirmation if some of the command does" do
+    assert_not Command::Composite.new(commands: [ build_command(needs_confirmation: false), build_command(needs_confirmation: false) ]).needs_confirmation?
+    assert Command::Composite.new(commands: [ build_command(needs_confirmation: true), build_command(needs_confirmation: false) ]).needs_confirmation?
+  end
+
+  private
+    def build_command(...)
+      TestCommand.new(...)
+    end
+
+    class TestCommand < Command
+      attribute :result
+      attribute :undoable
+      attribute :needs_confirmation
+
+      def execute
+        result
+      end
+
+      def undo
+        result
+      end
+
+      def undoable?
+        undoable
+      end
+
+      def needs_confirmation?
+        needs_confirmation
+      end
+    end
+end