add tests

Author: ali-cetin-4ss

tests/test_core.py

@@ -5089,6 +5089,135 @@ def test_extreme_absmax(self):
         assert extreme_out == pytest.approx(extreme_expect)
 
 
+    def test_reshape(self):
+        a = 7
+        b = 6
+
+        yp = np.linspace(0.0, 2.0, 20)
+        xp = np.linspace(0.0, 359.0, 10)
+        vp = np.array([[a * x_i + b * y_i for x_i in xp] for y_i in yp])
+        spectrum = DirectionalBinSpectrum(yp, xp, vp, freq_hz=True, degrees=True)
+
+        y = np.linspace(0.5, 1.0, 20)
+        grid_reshaped = spectrum.reshape(y, freq_hz=True)
+
+        freq_expect = (2.0 * np.pi) * y
+        dirs_expect = (np.pi / 180.0) * xp
+        vals_expect = np.array([[a * x_i + b * y_i for x_i in xp] for y_i in y]) / (2.0 * np.pi)
+
+        freq_out = grid_reshaped._freq
+        dirs_out = grid_reshaped._dirs
+        vals_out = grid_reshaped._vals
+
+        np.testing.assert_array_almost_equal(freq_out, freq_expect)
+        np.testing.assert_array_almost_equal(dirs_out, dirs_expect)
+        np.testing.assert_array_almost_equal(vals_out, vals_expect)
+
+    def test_reshape2(self):
+        a = 7
+        b = 6
+
+        yp = np.linspace(0.0, 2.0, 20)
+        xp = np.linspace(0.0, 359.0, 10)
+        vp = np.array([[a * x_i + b * y_i for x_i in xp] for y_i in yp])
+        spectrum = DirectionalBinSpectrum(yp, xp, vp, freq_hz=True, degrees=True)
+
+        y = np.linspace(0.5, 1.0, 20)
+        y_ = (2.0 * np.pi) * y
+        grid_reshaped = spectrum.reshape(y_, freq_hz=False)
+
+        freq_expect = (2.0 * np.pi) * y
+        dirs_expect = (np.pi / 180.0) * xp
+        vals_expect = np.array([[a * x_i + b * y_i for x_i in xp] for y_i in y]) / (2.0 * np.pi)
+
+        freq_out = grid_reshaped._freq
+        dirs_out = grid_reshaped._dirs
+        vals_out = grid_reshaped._vals
+
+        np.testing.assert_array_almost_equal(freq_out, freq_expect)
+        np.testing.assert_array_almost_equal(dirs_out, dirs_expect)
+        np.testing.assert_array_almost_equal(vals_out, vals_expect)
+
+    def test_reshape_complex_rectangular(self):
+        a_real = 7
+        b_real = 6
+        a_imag = 3
+        b_imag = 9
+
+        yp = np.linspace(0.0, 2.0, 20)
+        xp = np.linspace(0.0, 359.0, 10)
+        vp_real = np.array([[a_real * x_i + b_real * y_i for x_i in xp] for y_i in yp])
+        vp_imag = np.array([[a_imag * x_i + b_imag * y_i for x_i in xp] for y_i in yp])
+        vp = vp_real + 1j * vp_imag
+        spectrum = DirectionalBinSpectrum(yp, xp, vp, freq_hz=True, degrees=True)
+
+        y = np.linspace(0.5, 1.0, 20)
+        grid_reshaped = spectrum.reshape(
+            y, freq_hz=True, complex_convert="rectangular"
+        )
+
+        freq_out = grid_reshaped._freq
+        dirs_out = grid_reshaped._dirs
+        vals_out = grid_reshaped._vals
+
+        freq_expect = (2.0 * np.pi) * y
+        dirs_expect = (np.pi / 180.0) * xp
+        vals_real_expect = np.array(
+            [[a_real * x_i + b_real * y_i for x_i in xp] for y_i in y]
+        )
+        vals_imag_expect = np.array(
+            [[a_imag * x_i + b_imag * y_i for x_i in xp] for y_i in y]
+        )
+        vals_expect = (vals_real_expect + 1j * vals_imag_expect) / (2.0 * np.pi)
+
+        np.testing.assert_array_almost_equal(freq_out, freq_expect)
+        np.testing.assert_array_almost_equal(dirs_out, dirs_expect)
+        np.testing.assert_array_almost_equal(vals_out, vals_expect)
+
+    def test_reshape_complex_polar(self):
+        a_amp = 7
+        b_amp = 6
+        a_phase = 0.01
+        b_phase = 0.03
+
+        yp = np.linspace(0.0, 2.0, 20)
+        xp = np.linspace(0.0, 359.0, 10)
+        vp_amp = np.array([[a_amp * x_i + b_amp * y_i for x_i in xp] for y_i in yp])
+        vp_phase = np.array(
+            [[a_phase * x_i + b_phase * y_i for x_i in xp] for y_i in yp]
+        )
+        vp = vp_amp * (np.cos(vp_phase) + 1j * np.sin(vp_phase))
+        spectrum = DirectionalBinSpectrum(yp, xp, vp, freq_hz=True, degrees=True)
+
+        y = np.linspace(0.5, 1.0, 20)
+        grid_reshaped = spectrum.reshape(
+            y, freq_hz=True, complex_convert="polar"
+        )
+
+        freq_out = grid_reshaped._freq
+        dirs_out = grid_reshaped._dirs
+        vals_out = grid_reshaped._vals
+
+        freq_expect = (2.0 * np.pi) * y
+        dirs_expect = (np.pi / 180.0) * xp
+        vals_amp_expect = np.array(
+            [[a_amp * x_i + b_amp * y_i for x_i in xp] for y_i in y]
+        ) / (2.0 * np.pi)
+        x_, y_ = np.meshgrid(xp, y, indexing="ij", sparse=True)
+        vals_phase_cos_expect = RGI((xp, yp), np.cos(vp_phase).T)((x_, y_)).T
+        vals_phase_sin_expect = RGI((xp, yp), np.sin(vp_phase).T)((x_, y_)).T
+
+        vals_expect = (
+            vals_amp_expect
+            * (vals_phase_cos_expect + 1j * vals_phase_sin_expect)
+            / np.abs(vals_phase_cos_expect + 1j * vals_phase_sin_expect)
+        )
+
+        np.testing.assert_array_almost_equal(freq_out, freq_expect)
+        np.testing.assert_array_almost_equal(dirs_out, dirs_expect)
+        np.testing.assert_array_almost_equal(vals_out, vals_expect)
+
+
 class Test_WaveSpectrum:
     def test__init__(self):
         freq = np.linspace(0, 1.0, 10)