Add some useful ChefSpec for the user_ulimit resource

Signed-off-by: Tim Smith <tsmith@chef.io>

spec/unit/recipes/default_spec.rb

-require 'spec_helper'
-
-describe 'custom resource test recipe on ubuntu 16.04' do
-  let(:runner) { ChefSpec::ServerRunner.new(platform: 'ubuntu', version: '16.04') }
-  let(:chef_run) { runner.converge('test::default') }
-
-  it 'converges successfully' do
-    expect { :chef_run }.to_not raise_error
-  end
-end

spec/unit/recipes/user_ulimit.rb

+require 'spec_helper'
+
+describe 'user_ulimit resource' do
+  step_into :user_ulimit
+  platform 'ubuntu'
+
+  context 'without the filename specified' do
+    recipe do
+      user_ulimit 'tomcat' do
+        filehandle_soft_limit 8192
+      end
+    end
+
+    it { is_expected.to create_template('/etc/security/limits.d/tomcat_limits.conf') }
+  end
+
+  context 'with the filename specified and not ending in .conf' do
+    recipe do
+      user_ulimit 'tomcat' do
+        filename 'foo'
+        filehandle_soft_limit 8192
+      end
+    end
+
+    it { is_expected.to create_template('/etc/security/limits.d/foo.conf') }
+  end
+
+  context 'with the filename specified and ending in .conf' do
+    recipe do
+      user_ulimit 'tomcat' do
+        filename 'foo.conf'
+        filehandle_soft_limit 8192
+      end
+    end
+
+    it { is_expected.to create_template('/etc/security/limits.d/foo.conf') }
+  end
+
+  context 'with the username set to *' do
+    recipe do
+      user_ulimit 'tomcat' do
+        username '*'
+        filehandle_soft_limit 8192
+      end
+    end
+
+    it { is_expected.to create_template('/etc/security/limits.d/00_all_limits.conf') }
+  end
+end