ColorThief\Test\VBoxTest::testVolume PHP Method

    public function testVolume()
    {
        $this->vbox->r1 = 0;
        $this->vbox->r2 = 0;
        $this->vbox->g1 = 0;
        $this->vbox->g2 = 0;
        $this->vbox->b1 = 0;
        $this->vbox->b2 = 0;
        $this->assertSame(1, $this->vbox->volume());
        $this->vbox->r2 = 255;
        $this->vbox->g2 = 255;
        $this->vbox->b2 = 255;
        // Previous result should be cached.
        $this->assertSame(1, $this->vbox->volume());
        // Forcing refresh should now give the right result
        $this->assertSame(16777216, $this->vbox->volume(true));
    }