    public function testDefaultReturnValuesOfGetters()
    {
        $uri = new Uri();

        $this->assertSame('', $uri->getScheme());
        $this->assertSame('', $uri->getAuthority());
        $this->assertSame('', $uri->getUserInfo());
        $this->assertSame('', $uri->getHost());
        $this->assertNull($uri->getPort());
        $this->assertSame('', $uri->getPath());
        $this->assertSame('', $uri->getQuery());
        $this->assertSame('', $uri->getFragment());
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.