Add acceptance test for validate_cmd parameter.

spec/acceptance/validation_spec.rb

@@ -0,0 +1,35 @@
+require 'spec_helper_acceptance'
+
+describe 'concat validate_cmd parameter' do
+  basedir = default.tmpdir('concat')
+  context '=> "/usr/bin/test -e %"' do
+    before(:all) do
+      pp = <<-EOS
+        file { '#{basedir}':
+          ensure => directory
+        }
+      EOS
+
+      apply_manifest(pp)
+    end
+    pp = <<-EOS
+      concat { '#{basedir}/file':
+        validate_cmd => '/usr/bin/test -e %',
+      }
+      concat::fragment { 'content':
+        target  => '#{basedir}/file',
+        content => 'content',
+      }
+    EOS
+
+    it 'applies the manifest twice with no stderr' do
+      apply_manifest(pp, :catch_failures => true)
+      apply_manifest(pp, :catch_changes => true)
+    end
+
+    describe file("#{basedir}/file") do
+      it { should be_file }
+      it { should contain 'content' }
+    end
+  end
+end