public void AddPartTest()
    {
        // Test randomly attached part
        PartData        partData = new PartData();
        AxialCoordinate coord    = new AxialCoordinate {
            x = -1, y = 0
        };
        Part addedPart = new Part {
            shape = new GameObject(), type = -1
        };

        partData.addPart(coord, addedPart);

        // If false, means coord is occupied
        Assert.False(partData.checkPart(coord));
    }