public function testError()
{
$this->assertEmpty($this->flash->getAllError());
$this->assertNull($this->flash->getError("foo"));
$this->assertEquals("bar", $this->flash->getError("foo", "bar"));
$this->assertFalse($this->flash->hasAnyError());
$this->flash->setError("foo", "bar");
$this->flash = new FlashMessages($this->storage, $this->key);
$this->assertEquals(["foo" => "bar"], $this->flash->getAllError());
$this->assertEquals("bar", $this->flash->getError("foo"));
$this->assertTrue($this->flash->hasAnyError());
$this->flash->setError("foo", "bar");
$this->flash->setError("foo2", "bar2");
$this->assertArrayHasKey("error", $this->storage[$this->key]);
$this->assertEquals("bar", $this->storage[$this->key]["error"]["foo"]);
$this->flash->removeError("foo");
$this->assertArrayNotHasKey("foo", $this->storage[$this->key]["error"]);
$this->assertNotEmpty($this->storage[$this->key]["error"]);
$this->flash->removeAllError();
$this->assertEmpty($this->storage[$this->key]["error"]);
}