def test_lonpole():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.lonpole)
    w.lonpole = 45.0
    assert w.lonpole == 45.0
    del w.lonpole
    assert np.isnan(w.lonpole)

def test_datfix():
    w = _pywcs._Wcsprm()
    w.dateobs = b('31/12/99')
    status = w.datfix()
    assert status == 0
    assert w.dateobs == b('1999-12-31')
    assert w.mjdobs == 51543.0

def test_crota_missing2():
    w = _pywcs._Wcsprm()
    w.crota = [1, 0]
    assert w.has_crota() == True
    del w.crota
    assert w.has_crota() == False
    w.crota

def test_cd_missing2():
    w = _pywcs._Wcsprm()
    w.cd = [[1, 0], [0, 1]]
    assert w.has_cd() == True
    del w.cd
    assert w.has_cd() == False
    w.cd

def test_phi0():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.phi0)
    w.phi0 = 42.0
    assert w.phi0 == 42.0
    del w.phi0
    assert np.isnan(w.phi0)

def test_alt():
    w = _pywcs._Wcsprm()
    assert w.alt == b(" ")
    w.alt = b("X")
    assert w.alt == b("X")
    del w.alt
    assert w.alt == b(" ")

def test_cel_offset():
    w = _pywcs._Wcsprm()
    assert w.cel_offset is False
    w.cel_offset = 'foo'
    assert w.cel_offset is True
    w.cel_offset = 0
    assert w.cel_offset is False

def test_equinox():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.equinox)
    w.equinox = 0
    assert w.equinox == 0
    del w.equinox
    assert np.isnan(w.equinox)

def test_csyer():
    w = _pywcs._Wcsprm()
    assert w.crder.dtype == np.float
    assert np.all(np.isnan(w.crder))
    w.crder[0] = 0
    assert np.isnan(w.crder[1])
    assert w.crder[0] == 0

def test_zsource():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.zsource)
    w.zsource = 42.0
    assert w.zsource == 42.0
    del w.zsource
    assert np.isnan(w.zsource)

def test_mjdavg():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.mjdavg)
    w.mjdavg = 45.0
    assert w.mjdavg == 45.0
    del w.mjdavg
    assert np.isnan(w.mjdavg)

def test_obsgeo():
    w = _pywcs._Wcsprm()
    assert np.all(np.isnan(w.obsgeo))
    w.obsgeo = [1,2,3]
    assert_array_equal(w.obsgeo, [1,2,3])
    del w.obsgeo
    assert np.all(np.isnan(w.obsgeo))

def test_velangl():
    w = _pywcs._Wcsprm()
    assert w.velangl == 0.0
    w.velangl = 42.0
    assert w.velangl == 42.0
    del w.velangl
    assert np.isnan(w.velangl)

def test_velosys():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.velosys)
    w.velosys = 42.0
    assert w.velosys == 42.0
    del w.velosys
    assert np.isnan(w.velosys)

def test_mjdobs():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.mjdobs)
    w.mjdobs = 45.0
    assert w.mjdobs == 45.0
    del w.mjdobs
    assert np.isnan(w.mjdobs)

def test_latpole():
    w = _pywcs._Wcsprm()
    assert w.latpole == 90.0
    w.latpole = 45.0
    assert w.latpole == 45.0
    del w.latpole
    assert w.latpole == 90.0

def test_theta0():
    w = _pywcs._Wcsprm()
    assert np.isnan(w.theta0)
    w.theta0 = 42.0
    assert w.theta0 == 42.0
    del w.theta0
    assert np.isnan(w.theta0)

def test_crpix():
    w = _pywcs._Wcsprm()
    assert w.crpix.dtype == np.float
    assert_array_equal(w.crpix, [0, 0])
    w.crpix = [42, 54]
    assert_array_equal(w.crpix, [42, 54])
    w.crpix[0] = 0
    assert_array_equal(w.crpix, [0, 54])

def test_cd():
    w = _pywcs._Wcsprm()
    w.cd = [[1, 0], [0, 1]]
    assert w.cd.dtype == np.float
    assert w.has_cd() == True
    assert_array_equal(w.cd, [[1, 0], [0, 1]])
    del w.cd
    assert w.has_cd() == False

def test_crota():
    w = _pywcs._Wcsprm()
    w.crota = [1, 0]
    assert w.crota.dtype == np.float
    assert w.has_crota() == True
    assert_array_equal(w.crota, [1, 0])
    del w.crota
    assert w.has_crota() == False