----
-edit_link: ''
-title: Scientific Assertions
-origin_url: >-
- https://git.automotivelinux.org/apps/app-afb-test/plain/docs/Reference/LuaUnitAssertionFunctions/2_ScientificAssertions.md?h=master
----
-
-<!-- WARNING: This file is generated by fetch_docs.js using /home/boron/Documents/AGL/docs-webtemplate/site/_data/tocs/apis_services/master/app-afb-test-developer-guides-api-services-book.yml -->
-
-# Scientific assertions
-
->**Note**
->If you need to deal with value minus zero, be very careful because Lua versions
-are inconsistent on how they treat the >syntax -0 : it creates either a plus
-zero or a minus zero. Multiplying or dividing 0 by -1 also yields inconsistent >
-results. The reliable way to create the -0 value is : minusZero = -1 / (1/0).
-
-* **_AFT.assertIsNaN(value)**
- Assert that a given number is a *NaN* (Not a Number), according to the
- definition of IEEE-754_ . If provided, *extra_msg* is a string which will
- be printed along with the failure message.
-
-* **_AFT.assertIsPlusInf(value)**
-
- Assert that a given number is *plus infinity*, according to the definition of
- IEEE-754_. If provided, *extra_msg* is a string which will be printed along
- with the failure message.
-
-* **_AFT.assertIsMinusInf(value)**
-
- Assert that a given number is *minus infinity*, according to the definition of
- IEEE-754_. If provided, *extra_msg* is a string which will be printed along
- with the failure message.
-
-* **_AFT.assertIsInf(value)**
-
- Assert that a given number is *infinity* (either positive or negative),
- according to the definition of IEEE-754_. If provided, *extra_msg* is a string
- which will be printed along with the failure message.
-
-* **_AFT.assertIsPlusZero(value)**
-
- Assert that a given number is *+0*, according to the definition of IEEE-754_.
- The verification is done by dividing by the provided number and verifying
- that it yields *infinity* . If provided, *extra_msg* is a string which will
- be printed along with the failure message.
-
- Be careful when dealing with *+0* and *-0*, see note above
-
-* **_AFT.assertIsMinusZero(value)**
-
- Assert that a given number is *-0*, according to the definition of IEEE-754_.
- The verification is done by dividing by the provided number and verifying that
- it yields *minus infinity* . If provided, *extra_msg* is a string which will
- be printed along with the failure message.
-
- Be careful when dealing with *+0* and *-0*
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