public function testStrContains() { $this->assertTrue(Str::contains('taylor', 'ylo')); $this->assertTrue(Str::contains('taylor', ['ylo'])); $this->assertFalse(Str::contains('taylor', 'xxx')); $this->assertFalse(Str::contains('taylor', ['xxx'])); $this->assertFalse(Str::contains('taylor', '')); }