add functional tests for tar lockfile reading

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

test/functional/inspec_vendor_test.rb

@@ -116,4 +116,22 @@
     lockfile = File.join(inheritance_path, 'inspec.lock')
     File.exist?(lockfile).must_equal true
   end
+
+  it 'use lockfile in tarball' do
+    # ensure the profile is vendored and packaged as tar
+    out = inspec('vendor ' + meta_path + ' --overwrite')
+    out.exit_status.must_equal 0
+    out = inspec('archive ' + meta_path + ' --overwrite')
+    out.exit_status.must_equal 0
+
+    # clean cache directory
+    FileUtils.rm_rf "#{Dir.home}/.inspec/cache"
+
+    # execute json command
+    out = inspec(' meta-profile.tar.gz -l debug')
+    out.exit_status.must_equal 0
+
+    length = out.stdout.scan(/Fetching URL:/).length
+    length.must_equal 0
+  end
 end