Getting compile errors when attempting to compile a google test suite...

[Braun Brelin]

Hello all,

i'm trying to create a simple google test framework like so:

 #include "factorial.h"$                                                     
 2 #include <gtest/gtest.h>$
 3 $                                                                           
 4 class factorialTest : public testing::Test {$                               
 5     protected:$                                                             
 6     TEST_F (factorialTest,negative) {$                                      
 7         EXPECT_EQ (1,f.calculate_factorial(-5));$                           
 8     }$                                                                      
 9     factorial f;$                                                           
10 };$                                                                         
11 $                                                                           
12 int main(int argc, char ** argv) {$                                         
13     testing::InitGoogleTest(&argc,argv);$         
14     return(RUN_ALL_TESTS);$                       
15 }$                                         

The factorial.h header contains the factorial class that I'm trying to test.

I'm getting the following compile time error:

/home/bbrelin/Projects/neueda/src/gtest/factorial_test.cpp:6:5: error: invalid use of incomplete type ‘class factorialTest’
/home/bbrelin/Projects/neueda/src/gtest/factorial_test.cpp:4:7: error: forward declaration of ‘class factorialTest’

Can anybody tell me what I'm doing wrong here?

Thanks,

Braun Brelin

[Josh Kelley]

The TEST_F goes after the test fixture class.  (Under the hood, TEST_F actually creates a subclass of the test fixture class to do its register-and-run-tests magic.)  Since you're trying to create it before the test fixture class is fully declared, it's an incomplete type.

#include "factorial.h"
#include <gtest/gtest.h>

class factorialTest : public testing::Test {

protected:
    factorial f;
};

TEST_F (factorialTest,negative) {
    EXPECT_EQ(1, f.calculate_factorial(-5));
}

I'm not sure about the overall design here (does factorial::calculate_factorial really need to be an object method, instead of just a free function?), but that's a separate issue.

--

Josh Kelley

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