function testQuickCheckShrink()
{
$prop = Gen::forAll([Gen::asciiStrings()], function ($s) {
return !is_numeric($s);
});
$result = Quick::check(1000, $prop);
$this->assertFalse($result['result']);
$smallest = $result['shrunk']['smallest'][0];
$this->assertEquals('0', $smallest, "expected smallest to be '0' but got '{$smallest}'");
}
/**
* Determine the generators needed to test the function $f and then
* use the predicate $p to assert correctness.
*
* If $p is omitted, will simply check that $f returns true for
* each generated values.
*
* @param callable $f The function to test
* @param callable $p The predicate
* @param int $n number of iteration
* @throws NoGeneratorAnnotationException
* @return array
*/
public static function check(callable $f, callable $p = null, $n = 10)
{
if (is_null($p)) {
$p = function ($result) {
return $result === true;
};
}
$types = self::types($f);
$args = array();
foreach ($types as $t) {
$array = false;
if (substr($t, -2) == '[]') {
$t = substr($t, 0, -2);
$array = true;
}
if (array_key_exists($t, self::$generators)) {
$generator = self::$generators[$t];
} elseif (method_exists('QCheck\\Generator', $t . 's')) {
$generator = $t . 's';
} else {
throw new NoGeneratorAnnotationException("Unable to find a generator for {$t}");
}
if (!$generator instanceof Generator) {
$generator = call_user_func(array('QCheck\\Generator', $generator));
}
if ($array) {
$generator = $generator->intoArrays();
}
$args[] = $generator;
}
$check = function () use($f, $p) {
$result = call_user_func_array($f, func_get_args());
return $p($result);
};
$prop = Generator::forAll($args, $check);
return Quick::check($n, $prop);
}
public function testHslToHsb()
{
$h = Gen::choose(0, 255);
$s = Gen::choose(0, 100);
$b = Gen::choose(0, 100);
$gen = Gen::forAll([$h, $s, $b], function ($h, $s, $b) {
(new \Colourist\HSL($h, $s, $b))->toHsb();
return TRUE;
});
$check = Quick::check(self::RUN_COUNT, $gen);
if ($check['result']) {
$this->assertTrue($check['result']);
} else {
$failed = new \Colourist\HSL($check['fail'][0], $check['fail'][1], $check['fail'][2]);
$this->assertTrue($check['result'], "Unable to generate HSB colour for " . $failed->inspect());
}
}