Auto merge of #4731 - bundler:seg-ruby-head-specs, r=segiddins

[RubyVersion] Fix running when patch < 0

lib/bundler/ruby_version.rb

@@ -42,7 +42,7 @@ def to_s(versions = self.versions)
     PATTERN = /
       ruby\s
       ([\d.]+) # ruby version
-      (?:p(\d+))? # optional patchlevel
+      (?:p(-?\d+))? # optional patchlevel
       (?:\s\((\S+)\s(.+)\))? # optional engine info
     /xo
 
@@ -115,7 +115,9 @@ def self.system
                             else
                               raise BundlerError, "RUBY_ENGINE value #{RUBY_ENGINE} is not recognized"
       end
-      @ruby_version ||= RubyVersion.new(ruby_version, RUBY_PATCHLEVEL.to_s, ruby_engine, ruby_engine_version)
+      patchlevel = RUBY_PATCHLEVEL.to_s
+
+      @ruby_version ||= RubyVersion.new(ruby_version, patchlevel, ruby_engine, ruby_engine_version)
     end
 
     def to_gem_version_with_patchlevel

spec/install/gemspecs_spec.rb

@@ -60,8 +60,8 @@
       should_be_installed "foo 1.0"
     end
 
-    it "installs when patch level is specified and the version still matches the current version" do
-      pending "this feature does not support dev ruby versions" if RUBY_PATCHLEVEL < 0
+    it "installs when patch level is specified and the version still matches the current version",
+      :if => RUBY_PATCHLEVEL >= 0 do
       build_lib("foo", :path => bundled_app) do |s|
         s.required_ruby_version = "#{RUBY_VERSION}.#{RUBY_PATCHLEVEL}"
       end
@@ -73,8 +73,8 @@
       should_be_installed "foo 1.0"
     end
 
-    it "fails and complains about patchlevel on patchlevel mismatch" do
-      pending "this feature does not support dev ruby versions" if RUBY_PATCHLEVEL < 0
+    it "fails and complains about patchlevel on patchlevel mismatch",
+      :if => RUBY_PATCHLEVEL >= 0 do
       patchlevel = RUBY_PATCHLEVEL.to_i + 1
       build_lib("foo", :path => bundled_app) do |s|
         s.required_ruby_version = "#{RUBY_VERSION}.#{patchlevel}"