public function testIncrementDecrementCurrentDepth()
 {
     $maxDepth = 3;
     $this->instance->setDepth($maxDepth);
     $this->assertEquals($maxDepth, $this->instance->getDepth());
     $this->assertEquals(1, $this->instance->getCurrentDepth());
     $this->assertTrue($this->instance->incrementCurrentDepth() instanceof Serializer);
     $this->assertTrue($this->instance->isWithinBounds());
     $this->assertTrue($this->instance->incrementCurrentDepth() instanceof Serializer);
     $this->assertEquals($maxDepth, $this->instance->getCurrentDepth());
     $this->assertTrue($this->instance->isWithinBounds());
     $this->assertTrue($this->instance->incrementCurrentDepth() instanceof Serializer);
     $this->assertFalse($this->instance->isWithinBounds());
     $this->assertTrue($this->instance->decrementCurrentDepth() instanceof Serializer);
     $this->assertTrue($this->instance->isWithinBounds());
     $this->instance->resetCurrentDepth();
     $this->assertNotEquals($maxDepth, $this->instance->getCurrentDepth());
 }