Add updated README

1 files changed, 25 insertions, 1 deletions

diff --git a/README b/README
index 300770b..8c1a39c 100644
--- a/README
+++ b/README
@@ -1,6 +1,13 @@
 README for cmdtest
 ==================
 
+This project consists of two programs: the original `cmdtest`,
+and the newer `yarn`. Both are black box testing tools for Unix
+command line tools.
+
+cmdtest
+-------
+
 `cmdtest` black box tests Unix command line tools.
 Given some test scripts, their inputs, and expected outputs,
 it verifies that the command line produces the expected output.
@@ -9,10 +16,27 @@ If not, it reports problems, and shows the differences.
 See the manual page for details on how to use the program.
 
 
+yarn
+----
+
+`yarn` also black box tests Unix command line tools, but takes
+a different approach, where the emphasis is on verifying that the
+tools works correctly in a scenario, or sequence of operations, or
+what we call a "test story". `yarn` is inspired [BDD][BDD],
+behavior-driven development, and some of the implementations made
+by the Ruby community.
+
+See README.yarn for more details.
+
+`yarn` has been designed with Daniel Silverstone.
+
+[BDD]: https://en.wikipedia.org/wiki/Behavior-driven_development
+
+
 Legalese
 --------
 
-Copyright 2011  Lars Wirzenius
+Copyright 2011-2013 Lars Wirzenius
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by