public function testRpos() { $this->assertNull(StringHelper::rpos(null, 'sad')); $this->assertNull(StringHelper::rpos('a', 'sad', 10)); $this->assertEquals(1, StringHelper::rpos('lakanahbaha', 'a', -1)); $this->assertEquals(10, StringHelper::rpos('lakanahbahakjlapaosa', 'a', -5)); $this->assertEquals(19, StringHelper::rpos('lakanahbahakjlapaosa', 'a', 1)); $this->assertEquals(16, StringHelper::rpos('lakanahbahakjlapaosa', 'a', 2)); }