assertNull()

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.
doc_PHPUnit
2016-10-16 15:37:40
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