assertNull()


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

$actual 不是 null 时报告错误,错误讯息由 $message 指定。

assertNotNull() 是与之相反的断言,接受相同的参数。


例 A.39: assertNull() 的使用

  1. <?php
  2. use PHPUnit\Framework\TestCase;
  3.  
  4. class NullTest extends TestCase
  5. {
  6. public function testFailure()
  7. {
  8. $this->assertNull('foo');
  9. }
  10. }
  11. ?>
  1. phpunit NotNullTest
  2. PHPUnit 6.5.0 by Sebastian Bergmann and contributors.
  3.  
  4. F
  5.  
  6. Time: 0 seconds, Memory: 5.00Mb
  7.  
  8. There was 1 failure:
  9.  
  10. 1) NullTest::testFailure
  11. Failed asserting that 'foo' is null.
  12.  
  13. /home/sb/NotNullTest.php:6
  14.  
  15. FAILURES!
  16. Tests: 1, Assertions: 1, Failures: 1.