1 files changed, 93 insertions, 0 deletions
diff --git a/test/rubygems/test_gem_ext_builder.rb b/test/rubygems/test_gem_ext_builder.rb
index 6e34ee7e46..8383040f88 100644
--- a/test/rubygems/test_gem_ext_builder.rb
+++ b/test/rubygems/test_gem_ext_builder.rb
@@ -1,5 +1,6 @@
 require 'rubygems/test_case'
 require 'rubygems/ext'
+require 'rubygems/installer'
 
 class TestGemExtBuilder < Gem::TestCase
 
@@ -13,6 +14,10 @@ class TestGemExtBuilder < Gem::TestCase
     FileUtils.mkdir_p @dest_path
 
     @orig_DESTDIR = ENV['DESTDIR']
+
+    @spec = quick_spec 'a'
+
+    @builder = Gem::Ext::Builder.new @spec, ''
   end
 
   def teardown
@@ -56,5 +61,93 @@ install:
     end
   end
 
+  def test_build_extensions_none
+    use_ui @ui do
+      @builder.build_extensions
+    end
+
+    assert_equal '', @ui.output
+    assert_equal '', @ui.error
+
+    refute File.exist?('gem_make.out')
+  end
+
+  def test_build_extensions_extconf_bad
+    @spec.extensions << 'extconf.rb'
+
+    e = assert_raises Gem::Installer::ExtensionBuildError do
+      use_ui @ui do
+        @builder.build_extensions
+      end
+    end
+
+    assert_match(/\AERROR: Failed to build gem native extension.$/, e.message)
+
+    assert_equal "Building native extensions.  This could take a while...\n",
+                 @ui.output
+    assert_equal '', @ui.error
+
+    gem_make_out = File.join @gemhome, 'gems', @spec.full_name, 'gem_make.out'
+
+    assert_match %r%#{Regexp.escape Gem.ruby} extconf\.rb%,
+                 File.read(gem_make_out)
+    assert_match %r%#{Regexp.escape Gem.ruby}: No such file%,
+                 File.read(gem_make_out)
+  end
+
+  def test_build_extensions_unsupported
+    FileUtils.mkdir_p @spec.gem_dir
+    gem_make_out = File.join @spec.gem_dir, 'gem_make.out'
+    @spec.extensions << nil
+
+    e = assert_raises Gem::Installer::ExtensionBuildError do
+      use_ui @ui do
+        @builder.build_extensions
+      end
+    end
+
+    assert_match(/^\s*No builder for extension ''$/, e.message)
+
+    assert_equal "Building native extensions.  This could take a while...\n",
+                 @ui.output
+    assert_equal '', @ui.error
+
+    assert_equal "No builder for extension ''\n", File.read(gem_make_out)
+  ensure
+    FileUtils.rm_f gem_make_out
+  end
+
+  def test_build_extensions_with_build_args
+    args = ["--aa", "--bb"]
+    @builder.build_args = args
+    @spec.extensions << 'extconf.rb'
+
+    FileUtils.mkdir_p @spec.gem_dir
+
+    open File.join(@spec.gem_dir, "extconf.rb"), "w" do |f|
+      f.write <<-'RUBY'
+        puts "IN EXTCONF"
+        extconf_args = File.join File.dirname(__FILE__), 'extconf_args'
+        File.open extconf_args, 'w' do |f|
+          f.puts ARGV.inspect
+        end
+
+        File.open 'Makefile', 'w' do |f|
+          f.puts "default:\n\techo built"
+          f.puts "install:\n\techo installed"
+        end
+      RUBY
+    end
+
+    use_ui @ui do
+      @builder.build_extensions
+    end
+
+    path = File.join @spec.gem_dir, "extconf_args"
+
+    assert_equal args.inspect, File.read(path).strip
+    assert File.directory? File.join(@spec.gem_dir, 'lib')
+  end
+
 end