From 0d8c080f350e9d12e0bb81ee14b83a6046d1c0ad Mon Sep 17 00:00:00 2001
From: Rob Rix <rob.rix@github.com>
Date: Tue, 6 Oct 2015 13:22:37 -0400
Subject: [PATCH] Add a little API for diffs.

---
 prototype/DoubtTests/DiffTests.swift | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/prototype/DoubtTests/DiffTests.swift b/prototype/DoubtTests/DiffTests.swift
index 3c74b012e..cff5fa1dd 100644
--- a/prototype/DoubtTests/DiffTests.swift
+++ b/prototype/DoubtTests/DiffTests.swift
@@ -33,6 +33,18 @@ final class DiffTests: XCTestCase {
 	}
 }
 
+private func insert(term: Term) -> Diff {
+	return Diff.Pure(.Insert(term))
+}
+
+private func delete(term: Term) -> Diff {
+	return Diff.Pure(.Delete(term))
+}
+
+private func copy(term: Term) -> Diff {
+	return Diff.Roll(term.out.map(copy))
+}
+
 private typealias Term = Fix<Info>
 private typealias Diff = Free<Info, Patch<Info>>