assertNull()
assertNull(mixed $variable[, string $message = ''])
Reports an error identified by $message if $variable is not null.
assertNotNull() is the inverse of this assertion and takes the same arguments.
Example A.39: Usage of assertNull()
<?php
use PHPUnit\Framework\TestCase;
class NullTest extends TestCase
{
public function testFailure()
{
$this->assertNull('foo');
}
}
?>
phpunit NotNullTest PHPUnit 5.6.0 by Sebastian Bergmann and contributors. F Time: 0 seconds, Memory: 5.00Mb There was 1 failure: 1) NullTest::testFailure Failed asserting that 'foo' is null. /home/sb/NotNullTest.php:6 FAILURES! Tests: 1, Assertions: 1, Failures: 1.
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