simple converter from file to array with PHP

file2array.php

<?php
function file2array( $file ) {
  return file_exists( $file )
    ? array_filter( array_map( 'chop', file( $file ) ) )
    : array();
}

sample.txt

qwdowjc
wcowkc
coiwecw
jow     cj we

wowecu 

weiojioew

test_file2array.php

<?php
/** Tester */
require_once( 'Pearified/Testing/SimpleTest/unit_tester.php' );
/** Reporter */
require_once( 'Pearified/Testing/SimpleTest/reporter.php' );
/** file2array */
require_once( dirname( __FILE__ ).'/file2array.php' );

class Test_File2array extends UnitTestCase {
  function test_file2array_with_notexist_file() {
    $a = file2array( dirname( __FILE__ ).'/notexist' );
    $this->assertTrue( is_array( $a ) );
    $this->assertEqual( 0, sizeof( $a ) );
  }

  function test_file2array_with_exist_file() {
    $a = file2array( dirname( __FILE__ ).'/sample.txt' );
    $this->assertTrue( is_array( $a ) );
    foreach ( $a as $s ) {
      $this->assertTrue( preg_match( '/\A\S.*\S\z/', $s ) );
    }
  }
}

if ( realpath( $_SERVER['SCRIPT_FILENAME'] ) == __FILE__ ) {
  $test = new Test_File2array();
  if ( SimpleReporter::inCli() ) {
    $reporter = new TextReporter();
  } else {
    $reporter = new HtmlReporter();
  }
  $test->run( $reporter );
}