Add custom cert matcher

spec/support/acceptance/matchers/match_without_whitespace.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+# based on https://github.com/theforeman/puppet-certs/blob/master/spec/support/acceptance/matchers/match_without_whitespace.rb
+# https://github.com/theforeman/puppet-certs/commit/6b82334a5661a4e95b8c0604535ec39c991c9787
+RSpec::Matchers.define :match_without_whitespace do |expected|
+  match do |actual|
+    actual.gsub(%r{\s*}, '').match?(Regexp.new(expected.source, Regexp::EXTENDED))
+  end
+
+  failure_message do |actual|
+    "Actual:\n\n\s\s#{actual.gsub(%r{\s*}, '')}\n\nExpected:\n\n\s\s#{expected.source}"
+  end
+end