From 83148364a541b1fc75caed56a301cd03489f65bb Mon Sep 17 00:00:00 2001
From: Ross Ryles <Ross.Ryles@tracerco.com>
Date: Tue, 30 Oct 2012 09:00:45 +0000
Subject: [PATCH] Fix For Issue #10 - TEST_ASSERT_EQUAL_FLOAT doesn't fail if
 actual value is a NaN.

---
 src/unity.c      |  3 ++-
 test/testunity.c | 11 +++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/unity.c b/src/unity.c
index 0219b37..3787591 100644
--- a/src/unity.c
+++ b/src/unity.c
@@ -578,7 +578,8 @@ void UnityAssertFloatsWithin(const _UF delta,
         pos_delta = 0.0f - pos_delta;
     }
 
-    if (pos_delta < diff)
+    // NOTE: This comparrison is deliberately this way round so that NaNs fail.
+    if ( ! (pos_delta >= diff) )
     {
         UnityTestResultsFailBegin(lineNumber);
 #ifdef UNITY_FLOAT_VERBOSE
diff --git a/test/testunity.c b/test/testunity.c
index e98ca8f..ddd80c5 100755
--- a/test/testunity.c
+++ b/test/testunity.c
@@ -2226,6 +2226,17 @@ void testFloatsNotEqualNegative2(void)
 #endif
 }
 
+void testFloatsNotEqualActualNaN(void)
+{
+#ifdef UNITY_EXCLUDE_FLOAT
+    TEST_IGNORE();
+#else
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_FLOAT(85.963f, 0.0f / 0.0f);
+    VERIFY_FAILS_END
+#endif
+}
+
 void testEqualFloatArrays(void)
 {
 #ifdef UNITY_EXCLUDE_FLOAT
-- 
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