public function testIsAssoc() { $this->assertTrue(Arr::isAssoc(['a' => 'a', 0 => 'b'])); $this->assertTrue(Arr::isAssoc([1 => 'a', 0 => 'b'])); $this->assertTrue(Arr::isAssoc([1 => 'a', 2 => 'b'])); $this->assertFalse(Arr::isAssoc([0 => 'a', 1 => 'b'])); $this->assertFalse(Arr::isAssoc(['a', 'b'])); }