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### Setup your environment for tests
The framework used is [PHPUnit](https://phpunit.de/); it can be installed with [Composer](https://getcomposer.org/), which is a dependency management tool.
Regarding Composer, you can either use:
* a system-wide version, e.g. installed through your distro's package manager
* a local version, downloadable [here](https://getcomposer.org/download/)
#### Sample usage
```bash
# system-wide version
$ composer install
$ composer update
# local version
$ php composer.phar self-update
$ php composer.phar install
$ php composer.phar update
```
#### Install Shaarli dev dependencies
```bash
$ cd /path/to/shaarli
$ composer update
```
#### Install and enable Xdebug to generate PHPUnit coverage reports
For Debian-based distros:
```bash
$ aptitude install php5-xdebug
```
For ArchLinux:
```bash
$ pacman -S xdebug
```
Then add the following line to `/etc/php/php.ini`:
```ini
zend_extension=xdebug.so
```
#### Run unit tests
Successful test suite:
```bash
$ make test
-------
PHPUNIT
-------
PHPUnit 4.6.9 by Sebastian Bergmann and contributors.
Configuration read from /home/virtualtam/public_html/shaarli/phpunit.xml
....................................
Time: 759 ms, Memory: 8.25Mb
OK (36 tests, 65 assertions)
```
Test suite with failures and errors:
```bash
$ make test
-------
PHPUNIT
-------
PHPUnit 4.6.9 by Sebastian Bergmann and contributors.
Configuration read from /home/virtualtam/public_html/shaarli/phpunit.xml
E..FF...............................
Time: 802 ms, Memory: 8.25Mb
There was 1 error:
1) LinkDBTest::testConstructLoggedIn
Missing argument 2 for LinkDB::__construct(), called in /home/virtualtam/public_html/shaarli/tests/Link\
DBTest.php on line 79 and defined
/home/virtualtam/public_html/shaarli/application/LinkDB.php:58
/home/virtualtam/public_html/shaarli/tests/LinkDBTest.php:79
--
There were 2 failures:
1) LinkDBTest::testCheckDBNew
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'e3edea8ea7bb50be4bcb404df53fbb4546a7156e'
+'85eab0c610d4f68025f6ed6e6b6b5fabd4b55834'
/home/virtualtam/public_html/shaarli/tests/LinkDBTest.php:121
2) LinkDBTest::testCheckDBLoad
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'e3edea8ea7bb50be4bcb404df53fbb4546a7156e'
+'85eab0c610d4f68025f6ed6e6b6b5fabd4b55834'
/home/virtualtam/public_html/shaarli/tests/LinkDBTest.php:133
FAILURES!
Tests: 36, Assertions: 63, Errors: 1, Failures: 2.
```
#### Test results and coverage
By default, PHPUnit will run all suitable tests found under the `tests` directory.
Each test has 3 possible outcomes:
* `.` - success
* `F` - failure: the test was run but its results are invalid
* the code does not behave as expected
* dependencies to external elements: globals, session, cache...
* `E` - error: something went wrong and the tested code has crashed
* typos in the code, or in the test code
* dependencies to missing external elements
If Xdebug has been installed and activated, two coverage reports will be generated:
* a summary in the console
* a detailed HTML report with metrics for tested code
* to open it in a web browser: `firefox coverage/index.html &`
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