1 files changed, 25 insertions, 0 deletions
diff --git a/spec/functions/is_a_spec.rb b/spec/functions/is_a_spec.rb
new file mode 100644
index 0000000..8dec13f
--- /dev/null
+++ b/spec/functions/is_a_spec.rb
@@ -0,0 +1,25 @@
+require 'spec_helper'
+
+if ENV["FUTURE_PARSER"] == 'yes'
+  describe 'type_of' do
+    pending 'teach rspec-puppet to load future-only functions under 3.7.5' do
+      it { is_expected.not_to eq(nil) }
+    end
+  end
+end
+
+if Puppet.version.to_f >= 4.0
+  describe 'is_a' do
+    it { is_expected.not_to eq(nil) }
+    it { is_expected.to run.with_params().and_raise_error(ArgumentError) }
+    it { is_expected.to run.with_params('', '').and_raise_error(ArgumentError) }
+
+    it 'succeeds when comparing a string and a string' do
+      is_expected.to run.with_params('hello world', String).and_return(true)
+    end
+
+    it 'fails when comparing an integer and a string' do
+      is_expected.to run.with_params(5, String).and_return(false)
+    end
+  end
+end