UnityAssertFloatsWithin now fails any test where either a NaN or Infinite value is passed as expected or actual.

src/unity.c

@@ -578,8 +578,8 @@ void UnityAssertFloatsWithin(const _UF delta,
         pos_delta = 0.0f - pos_delta;
     }
 
-    // NOTE: This comparison is deliberately this way round so that NaNs fail.
+    //This first part of this condition will catch any NaN or Infinite values
-    if ( ! (pos_delta >= diff) )
+    if ((diff * 0.0f != 0.0f) || (pos_delta < diff))
     {
         UnityTestResultsFailBegin(lineNumber);
 #ifdef UNITY_FLOAT_VERBOSE

test/testunity.c

@@ -2281,6 +2281,50 @@ void testFloatsNotEqualNaNInf(void)
 #endif
 }
 
+void testFloatsNotEqualActualInf(void)
+{
+#ifdef UNITY_EXCLUDE_FLOAT
+    TEST_IGNORE();
+#else
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_FLOAT(321.642f, 1.0f / 0.0f);
+    VERIFY_FAILS_END
+#endif
+}
+
+void testFloatsNotEqualExpectedInf(void)
+{
+#ifdef UNITY_EXCLUDE_FLOAT
+    TEST_IGNORE();
+#else
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_FLOAT(1.0f / 0.0f, 321.642f);
+    VERIFY_FAILS_END
+#endif
+}
+
+void testFloatsNotEqualBothInf(void)
+{
+#ifdef UNITY_EXCLUDE_FLOAT
+    TEST_IGNORE();
+#else
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_FLOAT(1.0f / 0.0f, 1.0f / 0.0f);
+    VERIFY_FAILS_END
+#endif
+}
+
+void testFloatsNotEqualPlusMinusInf(void)
+{
+#ifdef UNITY_EXCLUDE_FLOAT
+    TEST_IGNORE();
+#else
+    EXPECT_ABORT_BEGIN
+    TEST_ASSERT_EQUAL_FLOAT(1.0f / 0.0f, -1.0f / 0.0f);
+    VERIFY_FAILS_END
+#endif
+}
+
 void testEqualFloatArrays(void)
 {
 #ifdef UNITY_EXCLUDE_FLOAT