CODEWITHSUNDEEP
cunit-testingtdd
hyperboreean
hyperboreean

Reputation: 8343

CppUTest not working

I am trying to rewrite some legacy C code and would like to have some tests in place before actually starting the rewrite. FOr this I took a look at CppUTest and tried a sample application consisting of a header file chrtostr.h, an implementation file chrtostr.c and a test file called test_chrtostr.c which contents is listed bellow:

#include <CppUTest/CommandLineTestRunner.h>

#include "chrtostr.h"

TEST_GROUP(chrtostr)
{
}

TEST(chrtostr, test_chrtostr)
{
  CHECK_EQUAL(chrtostr('n'), "sfsdfds");
}

int main(int ac, char **av)
{
  return CommandLineTestRunner::RunAllTests(ac, av);
}

And the corresponding Makefile.am:

AUTOMAKE_OPTIONS = foreign

CPPUTEST_HOME = ./cpputest
CFLAGS = -g -Wall -I$(CPPUTEST_HOME)/include
LDFLAGS = -L$(CPPUTEST_HOME)/lib -lCppUTest

bin_PROGRAMS = chrtostr test_chrtostr
chrtostr_SOURCES = chrtostr.c chrtostr.h main.c
test_chrtostr_SOURCES = test_chrtostr.c

The issue is that each time I try to run make I get the following traceback which doesn't actually help me too much: http://pastebin.com/BK9ts3vk

Upvotes: 3

Views: 5643

Answers (4)

James Grenning
James Grenning

Reputation: 106

I was just looking at this again. There were a few problems with your code. C++ errors don't always help clear them up.

I added comment before the things i fixed.

#include "CppUTest/TestHarness.h"

//The test file is c++. YOu have to tell it when you are linking to C code
extern "C"
{
#include "chrtostr.h"
}

//A test group needs to have a ';' after it. Under the hood, this macro 
//create a base class for the test cases of the same name
TEST_GROUP(Chrtostr)
{
};

//CHECK_EQUAL uses ==. STRCMP_EQUAL actually compares c-strings
TEST(Chrtostr, wrong)
{
  STRCMP_EQUAL(chrtostr('n'), "sfsdfds");
}

Upvotes: 1

James Grenning
James Grenning

Reputation: 106

You should probably start by getting one of the demos going. You could see how CppUTest is intended to be used with C. My book, Test-Driven Development for Embedded C, will help you get started too. The first few chapters use a C-Only test harness. Later examples use CppUTest (I'm one of the authors of CppUTest). I also describe the advantages of a C++ test harness for C.

James

p.s. - for more information on CppUTest, look at CppUTest.org

Upvotes: 7

Mark Bishop
Mark Bishop

Reputation: 9

Unfortunately, the "HelloWorld" example in CppUTest is undocumented and while the Appendix in "Test Driven Development for Embedded C" lists only 11 condition checks, I am finding that there are a lot more undocumented helper functions (all pretty much undocumented). I wouldn't recommend CppuTest unless you are trying to understand the concepts of TDD.

I would look for more of a commercial product or you are going to pick up a lot of bad TDD habits or get really frustrated and just move on.

Upvotes: 0

Mat
Mat

Reputation: 206851

That test driver is written in C++. You'll need to compile that as C++, so rename your file to .cpp and make sure g++ is called to drive the compile/link (rather than gcc).

Upvotes: 4

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