fqdn_rotate: Add tests for custom seeds

Author: elyscape

spec/functions/fqdn_rotate_spec.rb

@@ -21,6 +21,18 @@
     expect(val1).to eq(val2)
   end
 
+  it "allows extra arguments to control the random rotation on a single host" do
+    val1 = fqdn_rotate("abcdefg", :extra_identifier => [1, "different", "host"])
+    val2 = fqdn_rotate("abcdefg", :extra_identifier => [2, "different", "host"])
+    expect(val1).not_to eq(val2)
+  end
+
+  it "considers the same host and same extra arguments to have the same random rotation" do
+    val1 = fqdn_rotate("abcdefg", :extra_identifier => [1, "same", "host"])
+    val2 = fqdn_rotate("abcdefg", :extra_identifier => [1, "same", "host"])
+    expect(val1).to eq(val2)
+  end
+
   it "should rotate a string to give different values on different hosts" do
     val1 = fqdn_rotate("abcdefg", :host => 'one')
     val2 = fqdn_rotate("abcdefg", :host => 'two')
@@ -51,11 +63,13 @@
 
   def fqdn_rotate(value, args = {})
     host = args[:host] || '127.0.0.1'
+    extra = args[:extra_identifier] || []
 
     # workaround not being able to use let(:facts) because some tests need
     # multiple different hostnames in one context
     scope.stubs(:lookupvar).with("::fqdn").returns(host)
 
-    scope.function_fqdn_rotate([value])
+    function_args = [value] + extra
+    scope.function_fqdn_rotate(function_args)
   end
 end