ServerSpec

ServerSpec is an open-source testing framework designed to verify the state of servers after provisioning. It is implemented in Ruby and provides an RSpec-like DSL that allows users to express expectations about a target system in plain, readable tests. The framework focuses on validating what is true on a machine (for example, which packages are installed, which services are enabled, or what files exist) rather than performing configuration itself.

ServerSpec tests are written in Ruby using an RSpec-style syntax. Each test describes a resource on the remote host and asserts its state. For example, a test might describe a package and assert that it is installed, or describe a service and assert that it is enabled and running. The framework can run tests against a local machine or connect to a remote host via SSH. Common backends include SSH-based connections, with configuration specifying host, user, and authentication details.

Typical usage involves installing the serverspec gem, writing a set of spec files that describe the desired server state, and configuring the connection details. Tests are executed with the Ruby test runner (often via RSpec), making them suitable for inclusion in CI pipelines. ServerSpec is commonly used to verify post-provisioning state produced by configuration management tools such as Puppet, Chef, or Ansible, serving as a validation layer that complements those tools.

See also: RSpec, Serverspec (Ruby gem), InSpec.