diff tests/test_PitchBihist.py @ 36:3b67cd634b9a branch-tests

tests for pitch bihist, before refactoring

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_PitchBihist.py	Thu Sep 14 14:16:29 2017 +0100
@@ -0,0 +1,75 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Sep  1 19:11:52 2017
+
+@author: mariapanteli
+"""
+
+import pytest
+
+import numpy as np
+
+import scripts.PitchBihist as PitchBihist
+
+
+pbi = PitchBihist.PitchBihist()
+
+
+def test_hz_to_cents():
+    freq_Hz = np.array([32.703, 65.406, 55, 110])
+    freq_cents = pbi.hz_to_cents(freq_Hz)
+    freq_cents_true = np.array([0, 1200, 900, 2100])
+    assert np.array_equal(freq_cents, freq_cents_true)
+
+
+def test_wrap_to_octave():
+    cents = np.array([900, 2100, 1200])
+    octave_cents = pbi.wrap_to_octave(cents)
+    octave_cents_true = np.array([900, 900, 0])
+    assert np.array_equal(octave_cents, octave_cents_true)
+
+
+def test_get_melody_from_file():
+    melodia_file = 'data/sample_dataset/Melodia/mel_1_2_1.csv'
+    melody = pbi.get_melody_from_file(melodia_file)
+    assert len(melody) < 12. * pbi.chromasr
+
+
+def test_get_melody_matrix():
+    melody = 440 * np.ones(1000)
+    melody_matrix = pbi.get_melody_matrix(melody)
+    n_frames = melody_matrix.shape[1]
+    assert np.array_equal(melody_matrix[45, :], np.ones(n_frames))
+
+
+def test_bihist_from_melodia():
+    melodia_file = 'data/sample_dataset/Melodia/mel_1_2_1.csv'
+    bihist = pbi.bihist_from_melodia(melodia_file, secondframedecomp=False)
+    assert bihist.shape == (60, 60)
+
+
+def test_bihist_from_melodia_n_frames():
+    melodia_file = 'data/sample_dataset/Melodia/mel_1_2_1.csv'
+    bihist = pbi.bihist_from_melodia(melodia_file, secondframedecomp=True)
+    dur_sec = 11.5  # duration of first file in metadata.csv is > 11 seconds
+    n_frames_true = np.round((dur_sec - pbi.win2sec) * 2)  # for .5 sec hop size
+    assert bihist.shape[1] == n_frames_true
+
+
+def test_bihistogram():
+    melody = 440 * np.ones(1000)
+    melody_matrix = pbi.get_melody_matrix(melody)
+    bihist = pbi.bihistogram(melody_matrix, align=False)
+    assert np.array_equal(bihist, np.zeros((60, 60)))
+
+
+def test_bihistogram_values():
+    melody = np.concatenate([440 * np.ones(500), 32.703 * np.ones(500)])
+    melody_matrix = pbi.get_melody_matrix(melody)
+    # melody transitions from A to C (bin 45/60 to bin 0/60)
+    bihist = pbi.bihistogram(melody_matrix, align=False)
+    # expect only element [45, 0] to be non-zero
+    assert bihist[45, 0] > 0 and (np.sum(bihist) - bihist[45, 0]) == 0
+
+
+