From 6cca28582dae7c6a2c1392ac5dee275d3c3845c7 Mon Sep 17 00:00:00 2001
From: Rob Rix <rob.rix@github.com>
Date: Thu, 22 Oct 2015 18:51:14 -0400
Subject: [PATCH] Add a convenience to copy terms into diffs.

---
 prototype/DoubtTests/SESTests.swift | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/prototype/DoubtTests/SESTests.swift b/prototype/DoubtTests/SESTests.swift
index 4885a6871..313644e61 100644
--- a/prototype/DoubtTests/SESTests.swift
+++ b/prototype/DoubtTests/SESTests.swift
@@ -43,6 +43,10 @@ final class SESTests: XCTestCase {
 private typealias Term = Cofree<String, ()>
 private typealias Diff = Free<String, (), Patch<Term>>
 
+private func copy(term: Term) -> Diff {
+	return hylo(Diff.Introduce(()), Term.unwrap)(term)
+}
+
 private let a = Term((), .Leaf("a"))
 private let b = Term((), .Leaf("b"))
 private let c = Term((), .Leaf("c"))