More tests + test coverage

[ghost]

In this PR:

• added more regression tests (they were taken from php-tests directory — is it used anywhere?)
• added support for test coverage
• modified build file generator.

The most interesting part is "test coverage".

Now Phalcon can be build with --enable-coverage key, ie

phpize
./configure --enable-coverage
make

This requires lcov and genhtml programs (apt-get install lcov in Debian and Ubuntu).

To get the test coverage, run

make coverage

This will run regression tests, unit tests and then produce test coverage information in coverage/ directory (open coverage/index.html in the browser to view the details).

This is what the report looks like: https://www.diigo.com/item/image/3zdqq/hjpw

This can be useful if someone wants to write more tests as it shows completely grey areas not covered by any tests.

[phalcon]

It seems that we now have 3 unit-test suite-cases

Can we do something ASAP to unify them?

@niden @carvajaldiazeduar @xboston

[ghost]

Tests in ext/tests are for package maintainers so that they can use make test to make sure that the compiled extension is operational (those tests do not use database or external services etc — no external dependencies); these tests can check things that PHPUnit cannot (ie, make sure there is no crash or that fatal errors are generated as expected — all these things are possible only with process isolation); all the others tests go to unit-tests/.

I see there is php-tests directory but it does not seem to be used.

[niden]

The php-tests is the new test suite.

[ghost]

So should I put all new tests there? Otherwise we will end up doing duplicate job if we need to migrate the existing test cases into php-tests.

[niden]

Sure thing! I was migrating some of them over but then things got crazy at work .... you know the drill :)

[ghost]

Looks a bit sad:

.................FF....................F.......................  63 / 459 ( 13%)
............................................................... 126 / 459 ( 27%)
..................................................F..EEEE...... 189 / 459 ( 41%)
...................................EEEF........................ 252 / 459 ( 54%)
......FFFFFFFFFFFFFFFFFFFFF........FFFFFFFFFFFFFFFFFFFFFFFFFFFF 315 / 459 ( 68%)
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF 378 / 459 ( 82%)
FFFFF.........................FSegmentation fault

[ghost]

I think I need to revert d89c1de — PHPUnit uses wrong php-cgi binary to run the test and this is why the build fails.