How to implement unit test for a simple C function that returns binary data?

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I want to implement some very simple C/C++ unit tests for a function that is supposed to compress or decompress some data.

Mainly the input is a binary block and the output is also a binary block. The binary blocks should be less than 50 bytes, probably having 5-6 pairs.

I am looking for a solution that would preferably not require third party libraries. If it would require this one should be very small/simple.

"I am looking for a solution that would not require third party libraries."

Just write the unit-test function, it's easy: Create a function which will call the to-be-testet-function with different arguments and compare the result with the expected outputs. Add a function-pointer to that testing-function to a global function-pointer-array in which you store all testing-functions so that you can run all of them on demand.

Embedded C/C++ Unit Testing Basics, An overview of unit testing embedded software and firmware. require filesystems, BLE and Wi-Fi stacks, specialized data structures (both in-memory and #include <assert.h> // In my_sum.c int my_sum(int a, int b) { return a + b; } // In Although the example is basic, let's go over what is happening here. There's a lot of C code that is easily applicable to unit testing (I'll be talking about unit testing on the PC rather than on the target itself) as long as you stay clear of the 'bottom' layer: the stuff that talks directly to the microcontroller peripherals.

Write unit tests for C/C++, Write C++ unit tests in Visual Studio using various test frameworks including For more information, see How to: Use Google Test in Visual Studio. The basic configuration is similar for both the Microsoft and Google Test frameworks. To enable access to the functions in the project under test, add a  That is why we implement unit tests as a standard practice. The code below implements a simple unit test for ExecutePythonScript() method. No a lot of explanation here, it’s standard C# unit

There are two types of unit tests I could think of. 1. To check if the output is correct or not. For this you could try with inputs for which the output is known. In the unit code you could compare the output from the method with the known output. 2. To check regressions alone. I have used these kind of tests in some kind of legacy codebase. Here your functions are somehow proven (maybe tested with other means). But, when somebody makes some changes to this code you need to ensure that the main output is not either not corrupted. For this you could call the method in a particular build where you were sure that the function was working fine and capture this output as baseline. Later you could write a unit test driver to call the method and compare the output with the baseline output in all later builds. But you need to remember to update the baseline when the function was modified intentionally to modify the output later.

C Tutorial – Binary File I/O » CodingUnit Programming Tutorials, In an earlier tutorial we talked about file I/O functions and the use of text files. In this C programming tutorial we are going to talk about the use of binary files. return 0; }. in my test.bin i read "01 00 00 00" in my hexadecimal editor and uint_32 variable in there is usually 8 bytes instead of 5 due to compiler data packing. You can initialize CodeLens for a C++ unit test project in any of these ways: Edit and build your test project or solution. Rebuild your project or solution. Run tests from the Test Explorer window. After it's initialized, you can see test status icons above each unit test. Click on the icon for more information, or to run or debug the unit test: See also

I'm aware that this is a very old question, but I happen to come here with the same problem. I'm going to assume that the third party dependency was for a tool in order to compare binary data, not the unit test tool itself (I'm assuming this because is my same requirement).

What I ended up doing was something like this:

  char result_buffer[] = ""jJ";
  auto n               = memcmp(result_buffer, your_function(), sizeof(char) * 3);

In order to get the value for result_buffer, I actually go with the debugger and get that value from there. This way i can ensure that it's correct. After that, the only left to do was to check if n was 0 or not with you unit testing tool.

C function argument and return values, Basics · ALU, data‐path and control unit · Pipelining · Memory Organisation All C functions can be called either with arguments or without arguments in a C Similarly when it does not return a value, the calling function does not receive any data A example for this is getchar function it has no parameters but it returns an  The [Test] attribute indicates a method is a test method. Save this file and execute dotnet test to build the tests and the class library and then run the tests. The NUnit test runner contains the program entry point to run your tests. dotnet test starts the test runner using the unit test project you've created.

Program for Decimal to Binary Conversion, Data Structures expand_more Below diagram shows an example of converting the decimal number 17 to equivalent binary number. Below is the implementation of above idea. C/C++. filter_none. edit close. play_arrow. link brightness_4 code to test above function. int main(). {. int n = 17;. decToBinary(n);. return 0;. }  Function with no arguments but returns a value : There could be occasions where we may need to design functions that may not take any arguments but returns a value to the calling function. A example for this is getchar function it has no parameters but it returns an integer an integer type data that represents a character.

[PDF] CUTE: A Concolic Unit Testing Engine for C, model-checking, data structure testing, unit testing, testing. C programs. 1. We use a simple example to illustrate how CUTE performs testing. Consider the C function testme shown in Figure 1. This function The function. typeOf (l) returns this type. generate sorted binary trees, then a non-bounded depth- first search​  If your unit test is written and compiled as C, it should be okay. If your unit test is written and compiled as C++ (e.g. boost unit test) and you include a C file as in the example above, which in turn includes a C++-aware header, things can get complicated. I have no better solution, though. – Sascha Aug 4 '15 at 7:57 |

Unit Testing made easy in Go - RunGo, A unit test is a function that accepts the argument of type *testing.T and calls To execute the program, we need to use go run *.go because hello function is provided from the hello.go file. Hence We need to handle this case by returning a default message. You can output this binary using -c flag with go test command. In integration testing, you test the behavior of several classes interacting between them, that means that your get-data function must test that the data that is retrieving is correct (source-a, source-b and source-c are correct, and the data is being joining properly). Unit testing are easier and more focused, and should be created by developers.

Comments
  • It is unclear whether the 3rd party libraries referenced would help implement unit-tests or provide the same functionality (to be tested against them, then). Could you precise ?
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  • Using the 3rd party library known to work in practice is only useful to generate the dataset, unless you plan on doing fuzzy testing (but this is slightly different since the results are generally not reproductible).