Make JRuby before command hook work on Aruba environment

lib/aruba/config/jruby.rb

@@ -5,13 +5,21 @@
   config.before :command do
     next unless RUBY_PLATFORM == 'java'
 
+    jruby_opts = aruba.environment['JRUBY_OPTS'] || ''
+
     # disable JIT since these processes are so short lived
-    ENV['JRUBY_OPTS'] = "-X-C #{ENV['JRUBY_OPTS']}" unless (ENV['JRUBY_OPTS'] || '') .include? '-X-C'
+    jruby_opts = "-X-C #{jruby_opts}" unless jruby_opts.include? '-X-C'
 
     # Faster startup for jruby
-    ENV['JRUBY_OPTS'] = "--dev #{ENV['JRUBY_OPTS']}" unless (ENV['JRUBY_OPTS'] || '').include? '--dev'
+    jruby_opts = "--dev #{jruby_opts}" unless jruby_opts.include? '--dev'
+
+    set_environment_variable('JRUBY_OPTS', jruby_opts)
+
+    if RbConfig::CONFIG['host_os'] =~ /solaris|sunos/i
+      java_opts = aruba.environment['JAVA_OPTS'] || ''
 
-    # force jRuby to use client JVM for faster startup times
-    ENV['JAVA_OPTS'] = "-d32 #{ENV['JAVA_OPTS']}" if RbConfig::CONFIG['host_os'] =~ /solaris|sunos/i && !(ENV['JAVA_OPTS'] || '').include?('-d32')
+      # force jRuby to use client JVM for faster startup times
+      set_environment_variable('JAVA_OPTS', "-d32 #{java_opts}") unless java_opts.include?('-d32')
+    end
   end
 end

spec/aruba/jruby_spec.rb

@@ -2,54 +2,75 @@
 require 'aruba/api'
 
 describe "Aruba JRuby Startup Helper" do
-  before(:all) do
-    @fake_env = ENV.clone
-  end
+  include Aruba::Api
+  include_context 'uses aruba API'
+
+  let(:rb_config) { double('RbConfig::CONFIG') }
 
-  before :each do
+  before do
     Aruba.config.reset
 
-    # Define before_cmd-hook
+    # Define before :command hook
     load 'aruba/config/jruby.rb'
   end
 
-  before(:each) do
-    @fake_env['JRUBY_OPTS'] = "--1.9"
-    @fake_env['JAVA_OPTS'] = "-Xdebug"
-
-    stub_const('ENV', @fake_env)
+  around do |example|
+    with_environment('JRUBY_OPTS' => '--1.9', 'JAVA_OPTS' => '-Xdebug') do
+      example.run
+    end
   end
 
-  context 'when some mri ruby' do
-    before :each do
+  context 'when running under some MRI Ruby' do
+    before do
       stub_const('RUBY_PLATFORM', 'x86_64-chocolate')
     end
 
-    before :each do
+    it 'keeps the existing JRuby and Java option values' do
+      # Run defined before :command hook
       Aruba.config.before :command, self
-    end
 
-    it { expect(ENV['JRUBY_OPTS']).to eq '--1.9' }
-    it { expect(ENV['JAVA_OPTS']).to eq '-Xdebug' }
+      with_environment do
+        expect(ENV['JRUBY_OPTS']).to eq '--1.9'
+        expect(ENV['JAVA_OPTS']).to eq '-Xdebug'
+      end
+    end
   end
 
-  context 'when jruby ruby' do
-    before :each do
-      stub_const('RUBY_PLATFORM', 'java')
+  context 'when running under JRuby but not on Solaris' do
+    before do
+      stub_const 'RUBY_PLATFORM', 'java'
+      stub_const 'RbConfig::CONFIG', rb_config
+
+      allow(rb_config).to receive(:[]).with('host_os').and_return('foo-os')
     end
 
-    before :each do
-      rb_config = double('rb_config')
-      allow(rb_config).to receive(:[]).and_return('solaris')
+    it 'updates the existing JRuby but not Java option values' do
+      # Run defined before :command hook
+      Aruba.config.before :command, self
 
-      stub_const 'RbConfig::CONFIG', rb_config
+      with_environment do
+        expect(ENV['JRUBY_OPTS']).to eq '--dev -X-C --1.9'
+        expect(ENV['JAVA_OPTS']).to eq '-Xdebug'
+      end
     end
+  end
 
+  context 'when running under JRuby on Solaris' do
     before :each do
-      Aruba.config.before :command, self
+      stub_const 'RUBY_PLATFORM', 'java'
+      stub_const 'RbConfig::CONFIG', rb_config
+
+      allow(rb_config).to receive(:[]).with('host_os').and_return('solaris')
     end
 
-    it { expect(ENV['JRUBY_OPTS']).to eq '--dev -X-C --1.9' }
-    it { expect(ENV['JAVA_OPTS']).to eq '-d32 -Xdebug' }
+    it 'keeps the existing JRuby and Java option values' do
+      # Run defined before :command hook
+      Aruba.config.before :command, self
+
+      with_environment do
+        expect(ENV['JRUBY_OPTS']).to eq '--dev -X-C --1.9'
+        expect(ENV['JAVA_OPTS']).to eq '-d32 -Xdebug'
+      end
+    end
   end
 end