public function testConstraintFileExists() { $constraint = new PHPUnit_Framework_Constraint_FileExists(); $this->assertFalse($constraint->evaluate('foo')); $this->assertEquals('file exists', $constraint->toString()); try { $constraint->fail('foo', ''); } catch (PHPUnit_Framework_ExpectationFailedException $e) { $this->assertEquals('Failed asserting that file "foo" exists.', $e->getDescription()); return; } $this->fail(); }