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Update test_blade.py #109

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60 changes: 60 additions & 0 deletions tests/test_blade.py
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Original file line number Diff line number Diff line change
Expand Up @@ -835,3 +835,63 @@ def test_blade_str_method(self):
string += '\nInduced rake from skew (in unit length)'\
' for the sections = {}'.format(blade.induced_rake)
assert blade.__str__() == string

def test_blade_parameters_unchanged_after_transformations_and_rotation(self):
"""Test that blade parameters remain unchanged after transformations and rotation."""
# Create the original parameters
sections = np.asarray([NacaProfile(digits='0012') for i in range(10)])
radii = np.arange(0.4, 1.31, 0.1)
chord_lengths = np.concatenate((np.arange(0.55, 1.1, 0.15),
np.arange(1.03, 0.9, -0.03),
np.array([0.3])))
pitch = np.append(np.arange(3.0, 4., 0.2), np.arange(4.1, 3.2, -0.2))
rake = np.append(np.arange(5e-3, 0.08, 1e-2), np.arange(0.075, 0.02, -3e-2))
skew_angles = np.append(np.arange(-4., -9., -3.), np.arange(-7., 15., 3.))

# Store original section data
original_sections = []
for section in sections:
original_sections.append({
'xup': section.xup_coordinates.copy(),
'yup': section.yup_coordinates.copy(),
'xdown': section.xdown_coordinates.copy(),
'ydown': section.ydown_coordinates.copy()
})

# Build the blade
blade = bl.Blade(
sections=sections,
radii=radii,
chord_lengths=chord_lengths,
pitch=pitch,
rake=rake,
skew_angles=skew_angles)

# Apply transformations and rotate 180 degrees around z-axis
blade.apply_transformations()
blade.rotate(deg_angle=180)

# Verify parameters are unchanged
for i, section in enumerate(blade.sections):
np.testing.assert_array_equal(
section.xup_coordinates,
original_sections[i]['xup']
)
np.testing.assert_array_equal(
section.yup_coordinates,
original_sections[i]['yup']
)
np.testing.assert_array_equal(
section.xdown_coordinates,
original_sections[i]['xdown']
)
np.testing.assert_array_equal(
section.ydown_coordinates,
original_sections[i]['ydown']
)

np.testing.assert_array_equal(blade.radii, radii)
np.testing.assert_array_equal(blade.chord_lengths, chord_lengths)
np.testing.assert_array_equal(blade.pitch, pitch)
np.testing.assert_array_equal(blade.rake, rake)
np.testing.assert_array_equal(blade.skew_angles, skew_angles)
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