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<?php
namespace Hamcrest;
/*
Copyright (c) 2009 hamcrest.org
*/
class MatcherAssert
{
/**
* Number of assertions performed.
*
* @var int
*/
private static $_count = 0;
/**
* Make an assertion and throw {@link Hamcrest\AssertionError} if it fails.
*
* The first parameter may optionally be a string identifying the assertion
* to be included in the failure message.
*
* If the third parameter is not a matcher it is passed to
* {@link Hamcrest\Core\IsEqual#equalTo} to create one.
*
* Example:
* <pre>
* // With an identifier
* assertThat("apple flavour", $apple->flavour(), equalTo("tasty"));
* // Without an identifier
* assertThat($apple->flavour(), equalTo("tasty"));
* // Evaluating a boolean expression
* assertThat("some error", $a > $b);
* assertThat($a > $b);
* </pre>
*/
public static function assertThat(/* $args ... */)
{
$args = func_get_args();
switch (count($args)) {
case 1:
self::$_count++;
if (!$args[0]) {
throw new AssertionError();
}
break;
case 2:
self::$_count++;
if ($args[1] instanceof Matcher) {
self::doAssert('', $args[0], $args[1]);
} elseif (!$args[1]) {
throw new AssertionError($args[0]);
}
break;
case 3:
self::$_count++;
self::doAssert(
$args[0],
$args[1],
Util::wrapValueWithIsEqual($args[2])
);
break;
default:
throw new \InvalidArgumentException('assertThat() requires one to three arguments');
}
}
/**
* Returns the number of assertions performed.
*
* @return int
*/
public static function getCount()
{
return self::$_count;
}
/**
* Resets the number of assertions performed to zero.
*/
public static function resetCount()
{
self::$_count = 0;
}
/**
* Performs the actual assertion logic.
*
* If <code>$matcher</code> doesn't match <code>$actual</code>,
* throws a {@link Hamcrest\AssertionError} with a description
* of the failure along with the optional <code>$identifier</code>.
*
* @param string $identifier added to the message upon failure
* @param mixed $actual value to compare against <code>$matcher</code>
* @param \Hamcrest\Matcher $matcher applied to <code>$actual</code>
* @throws AssertionError
*/
private static function doAssert($identifier, $actual, Matcher $matcher)
{
if (!$matcher->matches($actual)) {
$description = new StringDescription();
if (!empty($identifier)) {
$description->appendText($identifier . PHP_EOL);
}
$description->appendText('Expected: ')
->appendDescriptionOf($matcher)
->appendText(PHP_EOL . ' but: ');
$matcher->describeMismatch($actual, $description);
throw new AssertionError((string) $description);
}
}
}
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