A test case without assertions ensures only that no exceptions are thrown. Beyond basic runnability, it ensures nothing about the behavior of the code under test.
This rule raised an issue when no assertions are found within a PHPUnit test method.
public function testDoSomething() { // Compliant
$myClass = new MyClass();
$myClass->getSomething();
}
public function testDoSomething() { // Noncompliant
$myClass = new MyClass();
$this->assertEquals("foo", $myClass->getSomething());
}