def test_semantics_floor_division():
# See Brian2 github issues #815 and #661
G = NeuronGroup(11,
'''a : integer
b : integer
x : 1
y : 1
fvalue : 1
ivalue : integer''',
dtype={
'a': np.int32,
'b': np.int64,
'x': np.float,
'y': np.double
})
int_values = np.arange(-5, 6)
float_values = np.arange(-5.0, 6.0, dtype=np.double)
G.ivalue = int_values
G.fvalue = float_values
with catch_logs() as l:
G.run_regularly('''
a = ivalue//3
b = ivalue//3
x = fvalue//3
y = fvalue//3
''')
run(defaultclock.dt)
# XXX: brian2 test adapted here for 1 warning
assert len(l) == 1
assert_equal(G.a[:], int_values // 3)
assert_equal(G.b[:], int_values // 3)
assert_allclose(G.x[:], float_values // 3)
assert_allclose(G.y[:], float_values // 3)
def test_aliasing_in_statements():
'''
Test an issue around variables aliasing other variables (#259)
'''
if prefs.codegen.target != 'numpy':
raise SkipTest('numpy-only test')
runner_code = '''x_1 = x_0
x_0 = -1'''
g = NeuronGroup(1, model='''x_0 : 1
x_1 : 1 ''')
g.run_regularly(runner_code)
net = Network(g)
net.run(defaultclock.dt)
assert_equal(g.x_0_[:], np.array([-1]))
assert_equal(g.x_1_[:], np.array([0]))
def test_aliasing_in_statements():
'''
Test an issue around variables aliasing other variables (#259)
'''
if prefs.codegen.target != 'numpy':
raise SkipTest('numpy-only test')
runner_code = '''x_1 = x_0
x_0 = -1'''
g = NeuronGroup(1, model='''x_0 : 1
x_1 : 1 ''')
g.run_regularly(runner_code)
net = Network(g)
net.run(defaultclock.dt)
assert_equal(g.x_0_[:], np.array([-1]))
assert_equal(g.x_1_[:], np.array([0]))