1 files changed, 64 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_commands_help_command.rb b/test/rubygems/test_gem_commands_help_command.rb
new file mode 100644
index 0000000000..acfc2daefc
--- /dev/null
+++ b/test/rubygems/test_gem_commands_help_command.rb
@@ -0,0 +1,64 @@
+######################################################################
+# This file is imported from the rubygems project.
+# DO NOT make modifications in this repo. They _will_ be reverted!
+# File a patch instead and assign it to Ryan Davis or Eric Hodel.
+######################################################################
+
+require "rubygems"
+require "rubygems/test_case"
+require "rubygems/commands/help_command"
+require "rubygems/format"
+require "rubygems/command_manager"
+
+class TestGemCommandsHelpCommand < Gem::TestCase
+  def setup
+    super
+
+    @cmd = Gem::Commands::HelpCommand.new
+  end
+
+  def test_gem_help_bad
+    util_gem 'bad' do |out, err|
+      assert_equal('', out)
+      assert_match(/Unknown command bad. Try gem help commands\n/, err)
+    end
+  end
+
+  def test_gem_help_platforms
+    util_gem 'platforms' do |out, err|
+      assert_match(/x86-freebsd/, out)
+      assert_equal '', err
+    end
+  end
+
+  def test_gem_help_commands
+    mgr = Gem::CommandManager.new
+
+    util_gem 'commands' do |out, err|
+      mgr.command_names.each do |cmd|
+        assert_match(/\s+#{cmd}\s+\S+/, out)
+      end
+      assert_equal '', err
+    end
+  end
+
+  def test_gem_no_args_shows_help
+    util_gem do |out, err|
+      assert_match(/Usage:/, out)
+      assert_match(/gem install/, out)
+      assert_equal '', err
+    end
+  end
+
+  def util_gem *args
+    @cmd.options[:args] = args
+
+    use_ui @ui do
+      Dir.chdir @tempdir do
+        @cmd.execute
+      end
+    end
+
+    yield @ui.output, @ui.error
+  end
+end