How to use Serverspec to test the utility installed in other user?

My requirement is that I need to run a utility that is installed in other user and I have to check the output returned from that session and verify it. Example :

• I installed java as srijava user
• Now in Serverspec I wrote the command to test the Java version (Assume that the java -version runs only in that user and not as root).
• if I use su srijava, then I do not get the output returned back to the root session and the test fails.
• If I run without su srijava then my utility will throw an error that the user is not SriJava

Code with su :

describe command('su srijava ; cd /app/java; ./java --version') do
  its(:stdout) { should contain('1.7') }
end

Code without su:

describe command('cd /app/java; ./java --version') do
  its(:stdout) { should contain('1.7') }
end

describe command("su -c '/app/java/java --version' srijava") do
  its(:stdout) { should contain('1.7') }
end

FYI you are using RSpec 2 and soon to be obsolete Serverspec syntax for your matcher. Consider futureproofing it with:

describe command("su -c '/app/java/java --version' srijava") do
  its(:stdout) { is_expected.to match(/1\.7/) }
end