test: ensure that plugins list command output is correct

bridgetown-core/test/test_plugins_command.rb

@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require "helper"
+require_all "bridgetown-core/commands/concerns"
+require "bridgetown-core/commands/plugins"
+
+class TestPluginsCommand < BridgetownUnitTest
+  context "list registered plugins" do
+    setup do
+      fixture_site
+      @cmd = Bridgetown::Commands::Plugins.new
+    end
+
+    should "exclude init (Initializer) from registered plugins list" do
+      out, err = capture_io do
+        @cmd.invoke(:list)
+      end
+
+      assert_nil err
+      refute_includes "init (Initializer)", out
+    end
+
+    should "exclude init (Initializer) from registered plugins count" do
+      out, err = capture_io do
+        @cmd.invoke(:list)
+      end
+
+      assert_nil err
+      assert_includes "Registered Plugins: 3", out
+    end
+  end
+end