当 $haystack 并非仅包含类型为 $type 的变量时报告错误，错误讯息由 $message 指定。

assertNotContainsOnly() 是与之相反的断言，并接受相同的参数。


例 A.8: assertContainsOnly() 的用法

  1. PHPUnit 6.5.0 by Sebastian Bergmann and contributors.
  2.  
  3. F
  4.  
  5. Time: 0 seconds, Memory: 5.00Mb
  6. There was 1 failure:
  7.  
  8. 1) ContainsOnlyTest::testFailure
  9. Failed asserting that Array (
  10.     0 => '1'
  11.     2 => 3
  12. ) contains only values of type "string".
  13.  
  14. /home/sb/ContainsOnlyTest.php:6
  15.  
  16. Tests: 1, Assertions: 1, Failures: 1.