From: Ben Waugh <b.waugh@ucl.ac.uk>
Date: Wed, 10 Apr 2013 21:19:42 +0000 (+0100)
Subject: Add example floating point testing to cheat sheet.
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=dc241dcc3aca56009a6cec59f21622a94f03050b;p=swc-testing-nose.git

Add example floating point testing to cheat sheet.
---

diff --git a/testing/cheat-sheet.md b/testing/cheat-sheet.md
index 3047fca..f792447 100644
--- a/testing/cheat-sheet.md
+++ b/testing/cheat-sheet.md
@@ -72,7 +72,17 @@ Nose provides a range of assertions that can be used when a test is not just che
 
 ### Floating point tests
 
-* assert_almost_equal...
+When comparing floating-point numbers for equality, allow some tolerance for small differences due to
+the way values are represented and rounded.
+
+    from nose.tools import assert_almost_equal
+
+    from mycode import hypotenuse
+
+    def test_hypotenuse_345():
+        observed = hypotenuse(3.0, 4.0)
+        expected = 5.0
+        assert_almost_equal(observed, expected)
 
 ### Fixtures