'No backend type is specified. Fall back to :exec type.'が大量に出てくる場合の対処法 ref: http://qiita.com/ikuwow/items/abdce2b4118f07241bc8

file0.txt

$ kitchen verify
-----> Starting Kitchen (v1.3.1)
-----> Verifying <default-ubuntu-1410>...
       Removing /tmp/busser/suites/serverspec
       Uploading /tmp/busser/suites/serverspec/base_spec.rb (mode=0644)
-----> Running serverspec test suite
       /opt/chef/embedded/bin/ruby -I/tmp/busser/suites/serverspec -I/tmp/busser/gems/gems/rspec-support-3.2.2/lib:/tmp/busser/gems/gems/rspec-core-3.2.2/lib /opt/chef/embedded/bin/rspec --pattern /tmp/busser/suites/serverspec/\*\*/\*_spec.rb --color --format documentation --default-path /tmp/busser/suites/serverspec

       Command "getenforce"
         stdout
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
       No backend type is specified. Fall back to :exec type.
           should match "Disabled"

       Finished in 0.11633 seconds (files took 0.30969 seconds to load)
       1 example, 0 failures

       Finished verifying <default-ubuntu-1410> (0m1.87s).

file1.txt

$ serverspec-init
Select OS type:

  1) UN*X
  2) Windows

Select number: 1

Select a backend type:

  1) SSH
  2) Exec (local)

Select number:

file3.txt

$ kitchen verify
-----> Starting Kitchen (v1.3.1)
-----> Verifying <default-ubuntu-1410>...
       Removing /tmp/busser/suites/serverspec
       Uploading /tmp/busser/suites/serverspec/base_spec.rb (mode=0644)
-----> Running serverspec test suite
       /opt/chef/embedded/bin/ruby -I/tmp/busser/suites/serverspec -I/tmp/busser/gems/gems/rspec-support-3.2.2/lib:/tmp/busser/gems/gems/rspec-core-3.2.2/lib /opt/chef/embedded/bin/rspec --pattern /tmp/busser/suites/serverspec/\*\*/\*_spec.rb --color --format documentation --default-path /tmp/busser/suites/serverspec

       Command "getenforce"
         stdout
           should match "Disabled"

       Finished in 0.07994 seconds (files took 0.28063 seconds to load)
       1 example, 0 failures

       Finished verifying <default-ubuntu-1410> (0m1.58s).
-----> Verifying <default-centos-66>...
       Removing /tmp/busser/suites/serverspec
       Uploading /tmp/busser/suites/serverspec/base_spec.rb (mode=0644)
-----> Running serverspec test suite
       /opt/chef/embedded/bin/ruby -I/tmp/busser/suites/serverspec -I/tmp/busser/gems/gems/rspec-support-3.2.2/lib:/tmp/busser/gems/gems/rspec-core-3.2.2/lib /opt/chef/embedded/bin/rspec --pattern /tmp/busser/suites/serverspec/\*\*/\*_spec.rb --color --format documentation --default-path /tmp/busser/suites/serverspec

       Command "getenforce"
         stdout
           should match "Disabled"

       Finished in 0.02523 seconds (files took 0.26327 seconds to load)
       1 example, 0 failures

       Finished verifying <default-centos-66> (0m1.52s).
-----> Kitchen is finished. (0m4.35s)

serverspecのテストコード

require 'serverspec'
set :backend, :exec

describe command("getenforce") do
    its(:stdout) { should match 'Disabled' }
end