spec/ruby: fix RUBY_DESCRIPTION check with JIT enabled

`make test-spec` adds `-r./$(arch)-fake` to pass header options.
But the $(arch)-fake.rb unexpectedly modifies RUBY_DESCRIPTION and it
always drops +JIT from it since the fake.rb is built with BOOTSTRAPRUBY,
which can be miniruby. miniruby can't find MJIT header and thus
mjit_init_p is always FALSE.

So, to pass `make test-spec` with JIT enabled, we can't use
RUBY_DESCRIPTION.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63503 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 18 insertions, 3 deletions

diff --git a/spec/ruby/command_line/dash_v_spec.rb b/spec/ruby/command_line/dash_v_spec.rb
index 995a46a87f..801ea42846 100644
--- a/spec/ruby/command_line/dash_v_spec.rb
+++ b/spec/ruby/command_line/dash_v_spec.rb
@@ -6,7 +6,14 @@ describe "The -v command line option" do
 
   describe "when used alone" do
     it "prints version and ends" do
-      ruby_exe(nil, args: '-v').include?(RUBY_DESCRIPTION).should == true
+      ruby_description =
+        if RubyVM::MJIT.enabled?
+          # fake.rb always drops +JIT from RUBY_DESCRIPTION. This resurrects that.
+          RUBY_DESCRIPTION.sub(/ \[[^\]]+\]$/, ' +JIT\0')
+        else
+          RUBY_DESCRIPTION
+        end
+      ruby_exe(nil, args: '-v').include?(ruby_description).should == true
     end
   end
 end
diff --git a/spec/ruby/command_line/rubyopt_spec.rb b/spec/ruby/command_line/rubyopt_spec.rb
index 81a57f97c3..cfb86dfc58 100644
--- a/spec/ruby/command_line/rubyopt_spec.rb
+++ b/spec/ruby/command_line/rubyopt_spec.rb
@@ -22,14 +22,22 @@ describe "Processing RUBYOPT" do
     result.should =~ /value of \$DEBUG is true/
   end
 
+  ruby_description =
+    if RubyVM::MJIT.enabled?
+      # fake.rb always drops +JIT from RUBY_DESCRIPTION. This resurrects that.
+      RUBY_DESCRIPTION.sub(/ \[[^\]]+\]$/, ' +JIT\0')
+    else
+      RUBY_DESCRIPTION
+    end
+
   it "prints the version number for '-v'" do
     ENV["RUBYOPT"] = '-v'
-    ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
+    ruby_exe("")[/\A.*/].should == ruby_description
   end
 
   it "ignores whitespace around the option" do
     ENV["RUBYOPT"] = ' -v '
-    ruby_exe("")[/\A.*/].should == RUBY_DESCRIPTION
+    ruby_exe("")[/\A.*/].should == ruby_description
   end
 
   it "sets $VERBOSE to true for '-w'" do