add integration test for filtering duplicate test locations

Signed-off-by: Christoph Hartmann <chris@lollyrock.com>

.kitchen.yml

@@ -44,6 +44,13 @@ suites:
     verifier:
       inspec_tests:
         - https://github.com/nathenharvey/tmp_compliance_profile.git
+  - name: duplicates
+    run_list:
+      - recipe[os_prepare]
+    verifier:
+      inspec_tests:
+        - path: ./test/integration/duplicates
+        - path: ./test/integration/duplicates
   # before you are able to use the compliance plugin, you need to run
   # insecure is only required if you use self-signed certificates
   # $ inspec compliance login https://compliance.test --user admin --insecure --token ''

test/integration/duplicates/dup.rb

@@ -0,0 +1,13 @@
+# encoding: utf-8
+
+# This is an InSpec test, that will be successful the first run. If it is
+# executed the second time, the test will fail
+path = '/tmp/file'
+describe file(path) do
+  it { should_not exist }
+end
+
+# HACK: create a second file to fail tests if they run twice
+describe command("mkdir -p #{path}") do
+  its('exit_status') { should eq 0 }
+end