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from pymprog import model

imap = model._idxmap



def test_del1():

    m = imap()

    a = m.add(5)

    assert a == 1

    m.del1(1)

    assert m.nmap == 4

    for i in range (5):

        assert m.map(1+i) == i

    m.del1(5)

    m.del1(3)

    assert m.map(3) == 0

    assert m.map(4) == 2

    try: 

        m.map(5) #exception

        assert 1>2

    except: pass

    assert m.nmap == 2

    a = m.add(3)

    assert a == 5

    assert m.map(a) == 3

    

    

    



def test_delmany():

    m = imap()

    a = m.add(50)

    assert a == 1

    dl = [2, 9, 20, 21, 22, 48, 49, 50]

    m.delmany(dl)

    prev = 0

    for i, d in enumerate(dl):

        if d<48: 

            #print(i, d, m.map(d-1))

            assert m.map(d-1) == (d-1-i if prev+1 < d else 0)

        try:

            assert m.map(d) == 0

            if d<48: assert 1>2

        except: pass

        prev = d



test_del1()

test_delmany()