From 683c4cc6914d1f71e90617c34ecb438b5cc356be Mon Sep 17 00:00:00 2001
From: Mike Gerwitz <mike@mikegerwitz.com>
Date: Thu, 15 May 2014 00:45:49 -0400
Subject: [PATCH] Added `not' expectation

Simply negates the result of whatever expectation it is given
---
 src/expect-core       |  5 +++++
 test/test-expect-core | 13 +++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/expect-core b/src/expect-core
index b2d2f49..ee40002 100644
--- a/src/expect-core
+++ b/src/expect-core
@@ -66,3 +66,8 @@ _expect--be() { _proxy-to "$@"; }
 _expect--succeed() { test "$1" -eq 0; }
 _expect--fail()    { test "$1" -ne 0; }
 
+
+##
+# Inverts the result of an expectation represented by the remainder clause
+_expect--not() { ! _proxy-to "$@"; }
+
diff --git a/test/test-expect-core b/test/test-expect-core
index bd06b78..a57f786 100644
--- a/test/test-expect-core
+++ b/test/test-expect-core
@@ -63,6 +63,19 @@ describe fail
 end
 
 
+describe not
+  it will invert the result of an expectation
+    # exit code of 1, so normally `succeed' would fail
+    expect _expect--not 1 2 succeed
+      to succeed
+
+    # exit code of 0, so normally `succeed' would succeed
+    expect _expect--not 0 2 succeed
+      to fail
+  end
+end
+
+
 describe output
   it will default to asserting against stdout
     expect _expect--output 0 2 "test string" <<< "test string"