* lib/rubygems*: Updated to RubyGems 2.0

* test/rubygems*:  ditto.

* common.mk (prelude):  Updated for RubyGems 2.0 source rearrangement.

* tool/change_maker.rb:  Allow invalid UTF-8 characters in source
  files.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37976 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/rubygems/test_gem_dependency.rb

@@ -9,6 +9,15 @@ class TestGemDependency < Gem::TestCase
     assert_equal req("> 1.0"), d.requirement
   end
 
+  def test_initialize_type_bad
+    e = assert_raises ArgumentError do
+      Gem::Dependency.new 'monkey' => '1.0'
+    end
+
+    assert_equal 'dependency name must be a String, was {"monkey"=>"1.0"}',
+                 e.message
+  end
+
   def test_initialize_double
     d = dep "pkg", "> 1.0", "< 2.0"
     assert_equal req("> 1.0", "< 2.0"), d.requirement
@@ -173,5 +182,42 @@ class TestGemDependency < Gem::TestCase
     assert dep('a', '= 1').specific?
   end
 
+  def test_to_specs_suggests_other_versions
+    a = util_spec 'a', '1.0', 'b' => '>= 1.0'
+
+    a_file = File.join a.gem_dir, 'lib', 'a_file.rb'
+
+    write_file a_file do |io|
+      io.puts '# a_file.rb'
+    end
+
+    dep = Gem::Dependency.new "a", "= 2.0"
+
+    e = assert_raises Gem::LoadError do
+      dep.to_specs
+    end
+
+    assert_equal "Could not find 'a' (= 2.0) - did find: [a-1.0]", e.message
+  end
+
+  def test_to_specs_indicates_total_gem_set_size
+    a = util_spec 'a', '1.0', 'b' => '>= 1.0'
+
+    a_file = File.join a.gem_dir, 'lib', 'a_file.rb'
+
+    write_file a_file do |io|
+      io.puts '# a_file.rb'
+    end
+
+    dep = Gem::Dependency.new "b", "= 2.0"
+
+    e = assert_raises Gem::LoadError do
+      dep.to_specs
+    end
+
+    assert_equal "Could not find 'b' (= 2.0) among 1 total gem(s)", e.message
+  end
+
+
 end