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<?php
/**
*
* Mock version of the PDOStatement class. Can be
* used to get a string representing a "bound" version
* of the query. Because PDO works using prepared statements,
* this can provide only a rough representation of the
* query, but this will usually be enough to check that
* your query has been built as expected.
*
*/
class DummyPDOStatement {
private $query = '';
private $input_parameters = array();
private $current_row = 1;
public function __construct($statement) {
$this->query = $statement;
}
public function execute($input_parameters=array()) {
$this->input_parameters = $input_parameters;
}
public function fetch($fetch_style) {
if ($this->current_row == 5) {
return false;
} else {
$this->current_row++;
return array('name' => 'Fred', 'age' => 10, 'id' => '1');
}
}
public function get_query() {
return $this->query;
}
public function get_parameters() {
return $this->input_parameters;
}
public function get_bound_query() {
$sql = $this->get_query();
$sql = str_replace("?", "%s", $sql);
$quoted_values = array();
$values = $this->get_parameters();
foreach ($values as $value) {
$quoted_values[] = '"' . $value . '"';
}
return vsprintf($sql, $quoted_values);
}
}
/**
*
* Mock database class implementing a subset
* of the PDO API.
*
*/
class DummyPDO {
private $last_query;
public function __construct($connection_string="") {
}
public function setAttribute($attribute, $value) {
}
public function prepare($statement) {
$this->last_query = new DummyPDOStatement($statement);
return $this->last_query;
}
public function lastInsertId() {
return 0;
}
public function get_last_query() {
return $this->last_query->get_bound_query();
}
}
/**
*
* Class to provide simple testing functionality
*
*/
class Tester {
private static $passed_tests = array();
private static $failed_tests = array();
private static $db;
/**
* Set the dummy database connection to be
* used by the class to capture the SQL strings
*/
public static function set_db($db) {
self::$db = $db;
}
/**
* Format a line for printing. Detects
* if the script is being run from the command
* line or from a browser.
*/
private static function format_line($line) {
if (isset($_SERVER['HTTP_USER_AGENT'])) {
return "<p>$line</p>\n";
} else {
return "$line\n";
}
}
/**
* Report a passed test
*/
private static function report_pass($test_name) {
echo self::format_line("PASS: $test_name");
self::$passed_tests[] = $test_name;
}
/**
* Report a failed test
*/
private static function report_failure($test_name, $query) {
echo self::format_line("FAIL: $test_name");
echo self::format_line("Expected: $query");
echo self::format_line("Actual: " . self::$db->get_last_query());
self::$failed_tests[] = $test_name;
}
/**
* Print a summary of passed and failed test counts
*/
public static function report() {
$passed_count = count(self::$passed_tests);
$failed_count = count(self::$failed_tests);
echo self::format_line("$passed_count tests passed. $failed_count tests failed.");
if ($failed_count != 0) {
echo self::format_line("Failed tests: " . join(", ", self::$failed_tests));
}
}
/**
* Check the provided string is equal to the last
* query generated by the dummy database class.
*/
public static function check_equal($test_name, $query) {
$last_query = self::$db->get_last_query();
if ($query == self::$db->get_last_query()) {
self::report_pass($test_name);
} else {
self::report_failure($test_name, $query);
}
}
}
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