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+# Unity - Getting Started
+
+## Welcome
+
+Congratulations. You're now the proud owner of your very own pile of bits! What
+are you going to do with all these ones and zeros? This document should be able
+to help you decide just that.
+
+Unity is a unit test framework. The goal has been to keep it small and
+functional. The core Unity test framework is three files: a single C file and a
+couple header files. These team up to provide functions and macros to make
+testing easier.
+
+Unity was designed to be cross-platform. It works hard to stick with C standards
+while still providing support for the many embedded C compilers that bend the
+rules. Unity has been used with many compilers, including GCC, IAR, Clang,
+Green Hills, Microchip, and MS Visual Studio. It's not much work to get it to
+work with a new target.
+
+
+### Overview of the Documents
+
+#### Unity Assertions reference
+
+This document will guide you through all the assertion options provided by
+Unity. This is going to be your unit testing bread and butter. You'll spend more
+time with assertions than any other part of Unity.
+
+
+#### Unity Assertions Cheat Sheet
+
+This document contains an abridged summary of the assertions described in the
+previous document. It's perfect for printing and referencing while you
+familiarize yourself with Unity's options.
+
+
+#### Unity Configuration Guide
+
+This document is the one to reference when you are going to use Unity with a new
+target or compiler. It'll guide you through the configuration options and will
+help you customize your testing experience to meet your needs.
+
+
+#### Unity Helper Scripts
+
+This document describes the helper scripts that are available for simplifying
+your testing workflow. It describes the collection of optional Ruby scripts
+included in the auto directory of your Unity installation. Neither Ruby nor
+these scripts are necessary for using Unity. They are provided as a convenience
+for those who wish to use them.
+
+
+#### Unity License
+
+What's an open source project without a license file? This brief document
+describes the terms you're agreeing to when you use this software. Basically, we
+want it to be useful to you in whatever context you want to use it, but please
+don't blame us if you run into problems.
+
+
+### Overview of the Folders
+
+If you have obtained Unity through Github or something similar, you might be
+surprised by just how much stuff you suddenly have staring you in the face.
+Don't worry, Unity itself is very small. The rest of it is just there to make
+your life easier. You can ignore it or use it at your convenience. Here's an
+overview of everything in the project.
+
+- `src` - This is the code you care about! This folder contains a C file and two
+header files. These three files _are_ Unity.
+- `docs` - You're reading this document, so it's possible you have found your way
+into this folder already. This is where all the handy documentation can be
+found.
+- `examples` - This contains a few examples of using Unity.
+- `extras` - These are optional add ons to Unity that are not part of the core
+project. If you've reached us through James Grenning's book, you're going to
+want to look here.
+- `test` - This is how Unity and its scripts are all tested. If you're just using
+Unity, you'll likely never need to go in here. If you are the lucky team member
+who gets to port Unity to a new toolchain, this is a good place to verify
+everything is configured properly.
+- `auto` - Here you will find helpful Ruby scripts for simplifying your test
+workflow. They are purely optional and are not required to make use of Unity.
+
+
+## How to Create A Test File
+
+Test files are C files. Most often you will create a single test file for each C
+module that you want to test. The test file should include unity.h and the
+header for your C module to be tested.
+
+Next, a test file will include a `setUp()` and `tearDown()` function. The setUp
+function can contain anything you would like to run before each test. The
+tearDown function can contain anything you would like to run after each test.
+Both functions accept no arguments and return nothing. You may leave either or
+both of these blank if you have no need for them. If you're using a compiler
+that is configured to make these functions optional, you may leave them off
+completely. Not sure? Give it a try. If you compiler complains that it can't
+find setUp or tearDown when it links, you'll know you need to at least include
+an empty function for these.
+
+The majority of the file will be a series of test functions. Test functions
+follow the convention of starting with the word "test_" or "spec_". You don't HAVE
+to name them this way, but it makes it clear what functions are tests for other
+developers.  Also, the automated scripts that come with Unity or Ceedling will default
+to looking for test functions to be prefixed this way. Test functions take no arguments 
+and return nothing. All test accounting is handled internally in Unity.
+
+Finally, at the bottom of your test file, you will write a `main()` function.
+This function will call `UNITY_BEGIN()`, then `RUN_TEST` for each test, and
+finally `UNITY_END()`.This is what will actually trigger each of those test
+functions to run, so it is important that each function gets its own `RUN_TEST`
+call.
+
+Remembering to add each test to the main function can get to be tedious. If you
+enjoy using helper scripts in your build process, you might consider making use
+of our handy generate_test_runner.rb script. This will create the main function
+and all the calls for you, assuming that you have followed the suggested naming
+conventions. In this case, there is no need for you to include the main function
+in your test file at all.
+
+When you're done, your test file will look something like this:
+
+```C
+#include "unity.h"
+#include "file_to_test.h"
+
+void setUp(void) {
+    // set stuff up here
+}
+
+void tearDown(void) {
+    // clean stuff up here
+}
+
+void test_function_should_doBlahAndBlah(void) {
+    //test stuff
+}
+
+void test_function_should_doAlsoDoBlah(void) {
+    //more test stuff
+}
+
+int main(void) {
+    UNITY_BEGIN();
+    RUN_TEST(test_function_should_doBlahAndBlah);
+    RUN_TEST(test_function_should_doAlsoDoBlah);
+    return UNITY_END();
+}
+```
+
+It's possible that you will need more customization than this, eventually.
+For that sort of thing, you're going to want to look at the configuration guide.
+This should be enough to get you going, though.
+
+
+## How to Build and Run A Test File
+
+This is the single biggest challenge to picking up a new unit testing framework,
+at least in a language like C or C++. These languages are REALLY good at getting
+you "close to the metal" (why is the phrase metal? Wouldn't it be more accurate
+to say "close to the silicon"?). While this feature is usually a good thing, it
+can make testing more challenging.
+
+You have two really good options for toolchains. Depending on where you're
+coming from, it might surprise you that neither of these options is running the
+unit tests on your hardware.
+There are many reasons for this, but here's a short version:
+- On hardware, you have too many constraints (processing power, memory, etc),
+- On hardware, you don't have complete control over all registers,
+- On hardware, unit testing is more challenging,
+- Unit testing isn't System testing. Keep them separate.
+
+Instead of running your tests on your actual hardware, most developers choose to
+develop them as native applications (using gcc or MSVC for example) or as
+applications running on a simulator. Either is a good option. Native apps have
+the advantages of being faster and easier to set up. Simulator apps have the
+advantage of working with the same compiler as your target application. The
+options for configuring these are discussed in the configuration guide.
+
+To get either to work, you might need to make a few changes to the file
+containing your register set (discussed later).
+
+In either case, a test is built by linking unity, the test file, and the C
+file(s) being tested. These files create an executable which can be run as the
+test set for that module. Then, this process is repeated for the next test file.
+This flexibility of separating tests into individual executables allows us to
+much more thoroughly unit test our system and it keeps all the test code out of
+our final release!
+
+
+*Find The Latest of This And More at [ThrowTheSwitch.org](https://throwtheswitch.org)*