Merge Bundler 2.1.0.pre.1 as developed version from upstream.

a53709556b

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67539 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/bundler/plugins/list_spec.rb

@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+RSpec.describe "bundler plugin list" do
+  before do
+    build_repo2 do
+      build_plugin "foo" do |s|
+        s.write "plugins.rb", <<-RUBY
+          class Foo < Bundler::Plugin::API
+            command "shout"
+
+            def exec(command, args)
+              puts "Foo shout"
+            end
+          end
+        RUBY
+      end
+      build_plugin "bar" do |s|
+        s.write "plugins.rb", <<-RUBY
+          class Bar < Bundler::Plugin::API
+            command "scream"
+
+            def exec(command, args)
+              puts "Bar scream"
+            end
+          end
+        RUBY
+      end
+    end
+  end
+
+  context "no plugins installed" do
+    it "shows proper no plugins installed message" do
+      bundle "plugin list"
+
+      expect(out).to include("No plugins installed")
+    end
+  end
+
+  context "single plugin installed" do
+    it "shows plugin name with commands list" do
+      bundle "plugin install foo --source file://#{gem_repo2}"
+      plugin_should_be_installed("foo")
+      bundle "plugin list"
+
+      expected_output = "foo\n-----\n  shout"
+      expect(out).to include(expected_output)
+    end
+  end
+
+  context "multiple plugins installed" do
+    it "shows plugin names with commands list" do
+      bundle "plugin install foo bar --source file://#{gem_repo2}"
+      plugin_should_be_installed("foo", "bar")
+      bundle "plugin list"
+
+      expected_output = "foo\n-----\n  shout\n\nbar\n-----\n  scream"
+      expect(out).to include(expected_output)
+    end
+  end
+end