public function testClearWithArgumentRemovesExistingMetadataForThatKeyOnly()
{
$this->storage->foo = 'bar';
$this->storage->bar = 'baz';
$this->storage->lock('foo');
$this->storage->lock('bar');
$this->storage->setMetadata('foo', 'bar');
$this->storage->setMetadata('bar', 'baz');
$this->storage->clear('foo');
$this->assertFalse($this->storage->isLocked('foo'));
$this->assertTrue($this->storage->isLocked('bar'));
$this->assertFalse($this->storage->getMetadata('foo'));
$this->assertEquals('baz', $this->storage->getMetadata('bar'));
}
