nicolasconnault
281 lines
9.6 KiB
PHP
281 lines
9.6 KiB
PHP
<?php // $Id$
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/**
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* Utility functions to make unit testing easier.
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*
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* These functions, particularly the the database ones, are quick and
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* dirty methods for getting things done in test cases. None of these
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* methods should be used outside test code.
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*
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* @copyright © 2006 The Open University
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* @author T.J.Hunt@open.ac.uk
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @version $Id$
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* @package SimpleTestEx
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*/
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require_once(dirname(__FILE__) . '/../config.php');
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require_once($CFG->libdir . '/simpletestlib/simpletest.php');
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require_once($CFG->libdir . '/simpletestlib/unit_tester.php');
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require_once($CFG->libdir . '/simpletestlib/expectation.php');
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require_once($CFG->libdir . '/simpletestlib/reporter.php');
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require_once($CFG->libdir . '/simpletestlib/web_tester.php');
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require_once($CFG->libdir . '/simpletestlib/mock_objects.php');
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/**
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* Recursively visit all the files in the source tree. Calls the callback
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* function with the pathname of each file found.
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*
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* @param $path the folder to start searching from.
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* @param $callback the function to call with the name of each file found.
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* @param $fileregexp a regexp used to filter the search (optional).
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* @param $exclude If true, pathnames that match the regexp will be ingored. If false,
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* only files that match the regexp will be included. (default false).
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* @param array $ignorefolders will not go into any of these folders (optional).
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*/
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function recurseFolders($path, $callback, $fileregexp = '/.*/', $exclude = false, $ignorefolders = array()) {
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$files = scandir($path);
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foreach ($files as $file) {
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$filepath = $path .'/'. $file;
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if ($file == '.' || $file == '..') {
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continue;
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} else if (is_dir($filepath)) {
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if (!in_array($filepath, $ignorefolders)) {
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recurseFolders($filepath, $callback, $fileregexp, $exclude, $ignorefolders);
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}
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} else if ($exclude xor preg_match($fileregexp, $filepath)) {
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call_user_func($callback, $filepath);
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}
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}
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}
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/**
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* An expectation for comparing strings ignoring whitespace.
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*/
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class IgnoreWhitespaceExpectation extends SimpleExpectation {
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var $expect;
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function IgnoreWhitespaceExpectation($content, $message = '%s') {
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$this->SimpleExpectation($message);
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$this->expect=$this->normalise($content);
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}
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function test($ip) {
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return $this->normalise($ip)==$this->expect;
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}
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function normalise($text) {
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return preg_replace('/\s+/m',' ',trim($text));
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}
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function testMessage($ip) {
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return "Input string [$ip] doesn't match the required value.";
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}
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}
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/**
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* An Expectation that two arrays contain the same list of values.
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*/
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class ArraysHaveSameValuesExpectation extends SimpleExpectation {
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var $expect;
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function ArraysHaveSameValuesExpectation($expected, $message = '%s') {
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$this->SimpleExpectation($message);
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if (!is_array($expected)) {
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trigger_error('Attempt to create an ArraysHaveSameValuesExpectation ' .
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'with an expected value that is not an array.');
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}
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$this->expect = $this->normalise($expected);
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}
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function test($actual) {
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return $this->normalise($actual) == $this->expect;
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}
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function normalise($array) {
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sort($array);
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return $array;
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}
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function testMessage($actual) {
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return 'Array [' . implode(', ', $actual) .
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'] does not contain the expected list of values [' . implode(', ', $this->expect) . '].';
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}
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}
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/**
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* An Expectation that compares to objects, and ensures that for every field in the
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* expected object, there is a key of the same name in the actual object, with
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* the same value. (The actual object may have other fields to, but we ignore them.)
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*/
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class CheckSpecifiedFieldsExpectation extends SimpleExpectation {
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var $expect;
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function CheckSpecifiedFieldsExpectation($expected, $message = '%s') {
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$this->SimpleExpectation($message);
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if (!is_object($expected)) {
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trigger_error('Attempt to create a CheckSpecifiedFieldsExpectation ' .
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'with an expected value that is not an object.');
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}
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$this->expect = $expected;
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}
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function test($actual) {
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foreach ($this->expect as $key => $value) {
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if (isset($value) && isset($actual->$key) && $actual->$key == $value) {
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// OK
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} else if (is_null($value) && is_null($actual->$key)) {
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// OK
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} else {
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return false;
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}
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}
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return true;
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}
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function testMessage($actual) {
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$mismatches = array();
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foreach ($this->expect as $key => $value) {
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if (isset($value) && isset($actual->$key) && $actual->$key == $value) {
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// OK
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} else if (is_null($value) && is_null($actual->$key)) {
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// OK
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} else {
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$mismatches[] = $key;
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}
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}
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return 'Actual object does not have all the same fields with the same values as the expected object (' .
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implode(', ', $mismatches) . ').';
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}
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}
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class MoodleUnitTestCase extends UnitTestCase {
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public $real_db;
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public $tables = array();
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public $pkfile;
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public $cfg;
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/**
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* In the constructor, record the max(id) of each test table into a csv file.
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* If this file already exists, it means that a previous run of unit tests
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* did not complete, and has left data undeleted in the DB. This data is then
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* deleted and the file is retained. Otherwise it is created.
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* @throws moodle_exception if CSV file cannot be created
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*/
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public function __construct($label = false) {
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parent::UnitTestCase($label);
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// MDL-16483 Get PKs and save data to text file
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global $DB, $CFG;
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$this->pkfile = $CFG->dataroot.'/testtablespks.csv';
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$this->cfg = $CFG;
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$tables = $DB->get_tables();
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// The file exists, so use it to truncate tables (tests aborted before test data could be removed)
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if (file_exists($this->pkfile)) {
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$this->truncate_test_tables($this->get_table_data($this->pkfile));
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} else { // Create the file
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$tabledata = '';
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foreach ($tables as $table) {
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if ($table != 'sessions2') {
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if (!$max_id = $DB->get_field_sql("SELECT MAX(id) FROM {$CFG->unittestprefix}{$table}")) {
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$max_id = 0;
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}
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$tabledata .= "$table, $max_id\n";
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}
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}
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if (!file_put_contents($this->pkfile, $tabledata)) {
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throw new moodle_exception('testtablescsvfileunwritable', 'error');
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}
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}
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}
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/**
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* Given an array of tables and their max id, truncates all test table records whose id is higher than the ones in the $tabledata array.
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* @param array $tabledata
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*/
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private function truncate_test_tables($tabledata) {
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global $CFG, $DB;
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$tables = $DB->get_tables();
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foreach ($tables as $table) {
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if ($table != 'sessions2' && isset($tabledata[$table])) {
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$DB->delete_records_select($table, "id > ?", array($tabledata[$table]));
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}
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}
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}
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/**
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* Given a filename, opens it and parses the csv contained therein. It expects two fields per line:
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* 1. Table name
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* 2. Max id
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* @param string $filename
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* @throws moodle_exception if file doesn't exist
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*/
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public function get_table_data($filename) {
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if (file_exists($this->pkfile)) {
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$handle = fopen($this->pkfile, 'r');
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$tabledata = array();
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while (($data = fgetcsv($handle, 1000, ",")) !== false) {
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$tabledata[$data[0]] = $data[1];
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}
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return $tabledata;
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} else {
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throw new moodle_exception('testtablescsvfilemissing', 'error');
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return false;
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}
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}
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/**
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* Method called before each test method. Replaces the real $DB with the one configured for unit tests (different prefix, $CFG->unittestprefix).
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* Also detects if this config setting is properly set, and if the user table exists.
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* TODO Improve detection of incorrectly built DB test tables (e.g. detect version discrepancy and offer to upgrade/rebuild)
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*/
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public function setUp() {
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global $CFG, $DB;
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parent::setUp();
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$this->real_db = $DB;
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if (empty($CFG->unittestprefix)) {
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print_error("prefixnotset", 'simpletest');
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}
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$DB = moodle_database::get_driver_instance($CFG->dbtype, $CFG->dblibrary);
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$DB->connect($CFG->dbhost, $CFG->dbuser, $CFG->dbpass, $CFG->dbname, $CFG->dbpersist, $CFG->unittestprefix);
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$manager = $DB->get_manager();
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if (!$manager->table_exists('user')) {
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print_error('tablesnotsetup', 'simpletest');
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}
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}
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/**
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* Method called after each test method. Doesn't do anything extraordinary except restore the global $DB to the real one.
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*/
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public function tearDown() {
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global $DB;
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parent::tearDown();
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$DB = $this->real_db;
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}
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/**
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* This will execute once all the tests have been run. It should delete the text file holding info about database contents prior to the tests
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* It should also detect if data is missing from the original tables.
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*/
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public function __destruct() {
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global $CFG;
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$CFG = $this->cfg;
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$this->truncate_test_tables($this->get_table_data($this->pkfile));
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fulldelete($this->pkfile);
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}
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}
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?>
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