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108 lines
2.5 KiB
Text
108 lines
2.5 KiB
Text
---
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title: About the gem Resource
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platform: os
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---
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# gem
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Use the `gem` Chef InSpec audit resource to test if a global Gem package is installed.
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<br>
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## Availability
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### Installation
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This resource is distributed along with Chef InSpec itself. You can use it automatically.
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### Version
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This resource first became available in v1.0.0 of InSpec.
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## Syntax
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A `gem` resource block declares a package and (optionally) a package version:
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describe gem('gem_package_name', 'gem_binary') do
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it { should be_installed }
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end
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where
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* `('gem_package_name')` must specify a Gem package, such as `'rubocop'`
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* `('gem_binary')` can specify the path to a non-default gem binary, defaults to `'gem'`
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* `be_installed` is a valid matcher for this resource
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<br>
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## Resource Property Examples
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The following examples show how to use this Chef InSpec audit resource.
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### Verify that a gem package is installed, with a specific version
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describe gem('rubocop') do
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it { should be_installed }
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its('version') { should eq '0.33.0' }
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end
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### Verify that a particular version is installed when there are multiple versions installed
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describe gem('rubocop') do
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it { should be_installed }
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its('versions') { should include /0.51.0/ }
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its('versions.count') { should_not be > 3 }
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end
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### Verify that a gem package is not installed
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describe gem('rubocop') do
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it { should_not be_installed }
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end
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### Verify that a gem package is installed in an omnibus environment
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describe gem('pry', '/opt/ruby-2.3.1/embedded/bin/gem') do
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it { should be_installed }
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end
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### Verify that a gem package is installed in a chef omnibus environment
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describe gem('chef-sugar', :chef) do
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it { should be_installed }
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end
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### Verify that a gem package is installed in a chef-server omnibus environment
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describe gem('knife-backup', :chef_server) do
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it { should be_installed }
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end
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<br>
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## Properties
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### version (String)
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The `version` property returns a string of the default version on the system:
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its('version') { should eq '0.33.0' }
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### versions
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The `versions` property returns an array of strings of all the versions of the gem installed on the system:
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its('versions') { should include /0.33/ }
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## Matchers
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For a full list of available matchers, please visit our [matchers page](https://www.inspec.io/docs/reference/matchers/).
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### be_installed
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The `be_installed` matcher tests if the named Gem package is installed:
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it { should be_installed }
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