def test_offset_methods():
"""Test methods for finding the voltage+current offsets."""
param = params.copy()
# param['debug'] = True
dciv_data = np.genfromtxt('tests/exp-data/dciv-data.csv', **csv_param)
# Automatic for voltage and current offset
param['voffset_range'] = 1e-3
_, _, dc0 = iv.dciv_curve(dciv_data, **param)
param['voffset_range'] = (-0.8e-3, 1e-3)
_, _, dc1 = iv.dciv_curve(dciv_data, **param)
# Set voltage offset
param['voffset'] = dc1.offset[0]
_, _, dc2 = iv.dciv_curve(dciv_data, **param)
# Set both
param['ioffset'] = dc1.offset[1]
_, _, dc3 = iv.dciv_curve(dciv_data, **param)
# Check values
assert abs(dc0.offset[0] - dc1.offset[0]) < 0.01e-3
assert abs(dc0.offset[0] - dc2.offset[0]) < 0.01e-3
assert abs(dc0.offset[0] - dc3.offset[0]) < 0.01e-3
assert abs(dc1.offset[1] - dc2.offset[1]) < 1e-6
assert abs(dc1.offset[1] - dc3.offset[1]) < 1e-6
# Load pumped I-V curve with both voffset and ioffset defined
pump_data = np.genfromtxt('tests/exp-data/f230_0_iv.csv', **csv_param)
pump = iv.iv_curve(pump_data, dc3, **param)
def test_try_importing_reflected_iv_data():
dciv_data = np.genfromtxt('tests/exp-data/dciv-data.csv', **csv_param)
dciv_data.flags.writeable = False
v1, i1, dc1 = iv.dciv_curve(dciv_data, **params)
v2, i2, dc2 = iv.dciv_curve(dciv_data[::-1, :], **params)
assert abs(dc1.vgap - dc2.vgap) < 0.05e-3
def test_vgap_methods():
"""Test methods for finding Vgap."""
# Method 1: Vgap is where the current passes
_, _, dc1 = iv.dciv_curve('tests/exp-data/dciv-data.csv', **params)
# Method 2: Vgap is where the derivative is the highest
tmp = params.copy()
tmp['vgap_threshold'] = None
_, _, dc2 = iv.dciv_curve('tests/exp-data/dciv-data.csv', **tmp)
# Both methods should be within 0.05 mV
assert abs(dc1.vgap - dc2.vgap) < 0.05e-3
def test_dciv_importing_bad_units():
tmp = params.copy()
tmp['i_fmt'] = 'A'
_, _, dc = iv.dciv_curve('tests/exp-data/dciv-data.csv', **tmp)
assert dc.rn < 1
def test_dciv_importing_bad_units():
tmp = params.copy()
tmp['i_fmt'] = 'A'
dciv_data = np.genfromtxt('tests/exp-data/dciv-data.csv', **csv_param)
_, _, dc = iv.dciv_curve(dciv_data, **tmp)
assert dc.rn < 1
def test_vgap():
"""Test method for finding Vgap."""
param = params.copy()
# param['debug'] = True
# Method 1: Vgap is where the current passes
dciv_data = np.genfromtxt('tests/exp-data/dciv-data.csv', **csv_param)
_, _, dc1 = iv.dciv_curve(dciv_data, **param)
# Both methods should be within 0.05 mV
assert abs(dc1.vgap - 2.715e-3) < 0.05e-3
def test_try_loading_list():
"""Try loading a list (not an accepted input type)."""
with pytest.raises(AssertionError):
_, _, _ = iv.dciv_curve([1, 2, 3])