public function testOnlyNumericArraysAreCastableAsAGraphList() { $shouldPassOne = GraphObjectFactory::isCastableAsGraphList([]); $shouldPassTwo = GraphObjectFactory::isCastableAsGraphList(['foo', 'bar']); $shouldFail = GraphObjectFactory::isCastableAsGraphList(['faz' => 'baz']); $this->assertTrue($shouldPassOne, 'Expected the given array to be castable as a GraphList.'); $this->assertTrue($shouldPassTwo, 'Expected the given array to be castable as a GraphList.'); $this->assertFalse($shouldFail, 'Expected the given array to not be castable as a GraphList.'); }