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161 lines
3.4 KiB
Markdown
161 lines
3.4 KiB
Markdown
---
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title: InSpec Universal Matchers Reference
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---
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# InSpec Universal Matchers Reference
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InSpec uses matchers to help compare resource values to expectations.
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The following matchers are available:
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You may also use any matcher provided by [RSpec::Expectations](https://relishapp.com/rspec/rspec-expectations/docs), but those matchers are outside of InSpec's [scope of support](https://www.inspec.io/docs/reference/inspec_and_friends/#rspec).
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The following InSpec-supported universal matchers are available:
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* [`be`](#be) - make numeric comparisons
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* [`be_in`](#be_in) - look for the property value in a list
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* [`cmp`](#cmp) - general-use equality (try this first)
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* [`eq`](#eq) - type-specific equality
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* [`include`](#include) - look for an expected value in a list-valued property
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* [`match`](#match) - look for patterns in text using regular expressions
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See [Explore InSpec resources](https://learn.chef.io/modules/explore-inspec-resources#/) on Learn Chef Rally to learn more about InSpec's built-in matchers.
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## be
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This matcher can be followed by many different comparison operators.
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Always make sure to use numbers, not strings, for these comparisons.
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```ruby
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describe file('/proc/cpuinfo') do
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its('size') { should be >= 10 }
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its('size') { should be < 1000 }
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end
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```
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## cmp
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Unlike `eq`, `cmp` is a matcher for less-restrictive comparisons. It will
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try to fit the actual value to the type you are comparing it to. This is
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meant to relieve the user from having to write type-casts and
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resolutions.
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```ruby
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describe sshd_config do
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its('Protocol') { should cmp 2 }
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end
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describe passwd.uid(0) do
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its('users') { should cmp 'root' }
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end
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```
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`cmp` behaves in the following way:
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* Compare strings to numbers
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```ruby
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describe sshd_config do
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its('Protocol') { should eq '2' }
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its('Protocol') { should cmp '2' }
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its('Protocol') { should cmp 2 }
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end
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```
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* String comparisons are not case-sensitive
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```ruby
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describe auditd_conf do
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its('log_format') { should cmp 'raw' }
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its('log_format') { should cmp 'RAW' }
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end
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```
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* Recognize versions embedded in strings
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```ruby
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describe package(curl) do
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its('version') { should cmp > '7.35.0-1ubuntu2.10' }
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end
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```
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* Compare arrays with only one entry to a value
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```ruby
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describe passwd.uids(0) do
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its('users') { should cmp 'root' }
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its('users') { should cmp ['root'] }
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end
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```
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* Single-value arrays of strings may also be compared to a regex
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```ruby
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describe auditd_conf do
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its('log_format') { should cmp /raw/i }
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end
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```
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* Improved printing of octal comparisons
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```ruby
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describe file('/proc/cpuinfo') do
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its('mode') { should cmp '0345' }
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end
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expected: 0345
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got: 0444
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```
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## eq
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Test for exact equality of two values.
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```ruby
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describe sshd_config do
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its('RSAAuthentication') { should_not eq 'no' }
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its('Protocol') { should eq '2' }
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end
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```
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`eq` fails if types don't match. Please keep this in mind, when comparing
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configuration entries that are numbers:
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```ruby
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its('Port') { should eq '22' } # ok
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its('Port') { should eq 22 }
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# fails: '2' != 2 (string vs int)
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```
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For less restrictive comparisons, please use `cmp`.
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## include
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Verifies if a value is included in a list.
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```ruby
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describe passwd do
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its('users') { should include 'my_user' }
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end
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```
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## be_in
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Verifies that an item is included in a list.
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```ruby
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describe resource do
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its('item') { should be_in LIST }
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end
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```
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## match
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Check if a string matches a regular expression.
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```ruby
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describe sshd_config do
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its('Ciphers') { should_not match /cbc/ }
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end
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```
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