Information Technology Reference
In-Depth Information
require
'chefspec'
describe
'apache-test::default'
ddo
chef_run
=
ChefSpec
:
:Runner
.
new
.
converge
(
'apache-test::default'
)
it
'installs apache2'
ddo
expect
(
chef_run
)
.
to install_package
(
'httpd'
)
end
end
end
end
ChefSpec does not require any special
chefspec
command to run as it just extends RSpec.
In the
apache-test
cookbook root, run
rspec --color
as shown in the following example to
perform a ChefSpec run:
$
rspec --color
.
Finished in 0.00042 seconds (files took 1.12 seconds to load)
1 example, 0 failures
When
rspec
runs, ChefSpec will inspect your Chef code and make sure it uses the
package
resource to install the
httpd
package. If ChefSpec verifies that your code does this, the test
passes, as in the
rspec
command you just ran.
Lazy Evaluation with Let
We need to introduce one more bit of RSpec syntax: lazy evaluation using the
let
helper
method, which is part of the RSpec core.
Figure 16-21
shows how ChefSpec commonly uses
let
helper method to cache the results of the
ChefSpec::Runner
object.
