Merge 53870297- to master

Glyn Normington · Glyn Normington · commit a309fe083243 · 2013-08-15T16:09:27.000+01:00
[Completes #53870297]
diff --git a/lib/java_buildpack/buildpack.rb b/lib/java_buildpack/buildpack.rb
@@ -44,7 +44,7 @@ def self.drive_buildpack_with_logger(app_dir, message)
         yield new(app_dir)
       rescue => e
         logger.error(message % e.inspect)
-        logger.debug("Exception #{e.inspect} backtrace: #{e.backtrace}")
+        logger.debug("Exception #{e.inspect} backtrace:\n#{e.backtrace.join("\n")}")
         abort e.message
       end
     end
diff --git a/spec/java_buildpack/buildpack_spec.rb b/spec/java_buildpack/buildpack_spec.rb
@@ -63,6 +63,14 @@ module JavaBuildpack
       expect(detected).to be_empty
     end
 
+    it 'should raise an error on compile if no container can run an application' do
+      with_buildpack { |buildpack| expect { buildpack.compile }.to raise_error(/No supported application type/) }
+    end
+
+    it 'should raise an error on release if no container can run an application' do
+      with_buildpack { |buildpack| expect { buildpack.release }.to raise_error(/No supported application type/) }
+    end
+
     it 'should raise an error if more than one JRE can run an application' do
       stub_jre1.stub(:detect).and_return('stub-jre-1')
       stub_jre2.stub(:detect).and_return('stub-jre-2')
