def test_append(self):
"""
Test the append function.
"""
l = LongArray(0)
l.append(1)
l.append(2)
l.append(3)
self.assertEqual(l.length, 3)
self.assertEqual(l[0], 1)
self.assertEqual(l[1], 2)
self.assertEqual(l[2], 3)
def test_squeeze(self):
"""
Tests the squeeze function.
"""
l = LongArray(5)
l.append(4)
self.assertEqual(l.alloc > l.length, True)
l.squeeze()
self.assertEqual(l.length, 6)
self.assertEqual(l.alloc == l.length, True)
self.assertEqual(len(l.get_npy_array()), 6)
def test_remove_particles(self):
"""
Tests the remove_particles function.
"""
x = [1, 2, 3, 4.]
y = [0., 1., 2., 3.]
z = [0., 0., 0., 0.]
m = [1., 1., 1., 1.]
h = [.1, .1, .1, .1]
p = particle_array.ParticleArray(x={'data':x}, y={'data':y},
z={'data':z}, m={'data':m},
h={'data':h})
p.add_temporary_array('tmp1')
remove_arr = LongArray(0)
remove_arr.append(0)
remove_arr.append(1)
p.remove_particles(remove_arr)
self.assertEqual(p.get_number_of_particles(), 2)
self.assertEqual(check_array(p.x, [3., 4.]), True)
self.assertEqual(check_array(p.y, [2., 3.]), True)
self.assertEqual(check_array(p.z, [0., 0.]), True)
self.assertEqual(check_array(p.m, [1., 1.]), True)
self.assertEqual(check_array(p.h, [.1, .1]), True)
self.assertEqual(len(p.tmp1), 2)
# now try invalid operatios to make sure errors are raised.
remove_arr.resize(10)
self.assertRaises(ValueError, p.remove_particles, remove_arr)
# now try to remove a particle with index more that particle
# length.
remove_arr.resize(1)
remove_arr[0] = 2
p.remove_particles(remove_arr)
# make sure no change occurred.
self.assertEqual(p.get_number_of_particles(), 2)
self.assertEqual(check_array(p.x, [3., 4.]), True)
self.assertEqual(check_array(p.y, [2., 3.]), True)
self.assertEqual(check_array(p.z, [0., 0.]), True)
self.assertEqual(check_array(p.m, [1., 1.]), True)
self.assertEqual(check_array(p.h, [.1, .1]), True)
self.assertEqual(len(p.tmp1), 2)