assertNan()

assertNan(mixed $variable[, string $message = ''])

当 $variable 不是 NAN 时报告错误，错误讯息由 $message 指定。

例 A.38: assertNan() 的用法

<?php
use PHPUnit\Framework\TestCase;
 
class NanTest extends TestCase
{
    public function testFailure()
    {
        $this->assertNan(1);
    }
}
?>

phpunit NanTest
PHPUnit 6.5.0 by Sebastian Bergmann and contributors.
 
F
 
Time: 0 seconds, Memory: 5.00Mb
 
There was 1 failure:
 
1) NanTest::testFailure
Failed asserting that 1 is nan.
 
/home/sb/NanTest.php:6
 
FAILURES!
Tests: 1, Assertions: 1, Failures: 1.