From dd76eb37edd36bda56cb063fbb1ef3c111406b5b Mon Sep 17 00:00:00 2001
From: Daniel James <daniel@calamity.org.uk>
Date: Thu, 15 Dec 2005 00:22:00 +0000
Subject: [PATCH] More epsilon hash float tests.

[SVN r32055]
---
 hash/test/hash_float_test.cpp | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/hash/test/hash_float_test.cpp b/hash/test/hash_float_test.cpp
index 00a8070..bfb9f8a 100644
--- a/hash/test/hash_float_test.cpp
+++ b/hash/test/hash_float_test.cpp
@@ -141,9 +141,25 @@ void float_tests(char const* name, T* = 0)
     if(x1(std::numeric_limits<T>::epsilon()) == x1((T) 0))
         std::cout<<"x1(epsilon) == x1(0) == "<<x1((T) 0)<<"\n";
 
-    BOOST_CHECK(std::numeric_limits<T>::epsilon() + (T) 1 != (T) 1);
-    if(x1(std::numeric_limits<T>::epsilon() + (T) 1) == x1((T) 1))
-        std::cout<<"x1(epsilon + 1) == x1(1) == "<<x1((T) 1)<<"\n";
+    BOOST_CHECK(-std::numeric_limits<T>::epsilon() != (T) 0);
+    if(x1(-std::numeric_limits<T>::epsilon()) == x1((T) 0))
+        std::cout<<"x1(-epsilon) == x1(0) == "<<x1((T) 0)<<"\n";
+
+    BOOST_CHECK((T) 1 + std::numeric_limits<T>::epsilon() != (T) 1);
+    if(x1((T) 1 + std::numeric_limits<T>::epsilon()) == x1((T) 1))
+        std::cout<<"x1(1 + epsilon) == x1(1) == "<<x1((T) 1)<<"\n";
+
+    BOOST_CHECK((T) 1 - std::numeric_limits<T>::epsilon() != (T) 1);
+    if(x1((T) 1 - std::numeric_limits<T>::epsilon()) == x1((T) 1))
+        std::cout<<"x1(1 - epsilon) == x1(1) == "<<x1((T) 1)<<"\n";
+
+    BOOST_CHECK((T) -1 + std::numeric_limits<T>::epsilon() != (T) -1);
+    if(x1((T) -1 + std::numeric_limits<T>::epsilon()) == x1((T) -1))
+        std::cout<<"x1(-1 + epsilon) == x1(-1) == "<<x1((T) -1)<<"\n";
+
+    BOOST_CHECK((T) -1 - std::numeric_limits<T>::epsilon() != (T) -1);
+    if(x1((T) -1 - std::numeric_limits<T>::epsilon()) == x1((T) -1))
+        std::cout<<"x1(-1 - epsilon) == x1(-1) == "<<x1((T) -1)<<"\n";
 
     // As before.
     if(std::numeric_limits<T>::has_denorm) {