How to test if string contains another string in PHPUnit?

Question

As you could tell assertContains is for checking that an array contains a value.

Looking to see if the string contains a substring, your simplest query would be to use assertRegexp()

$this->assertRegexp('/flour/', $plaintext);

You would just need to add the delimiters.

If you really want to have an assertStringContains assertion, you can extend PHPUnit_Framework_TestCase and create your own.

UPDATE

In the pre-9 versions of PHPUnit, assertContains will work on strings.

From 9+ we need to use assertStringContainsString or assertStringContainsStringIgnoringCase.