Tests: assert ReadWAV() length is accurate

Uses Python's scipy.io.wavfile as a source of truth. #33 #34

Author: swharden

dev/python/readwav.py

@@ -0,0 +1,16 @@
+"""
+sample rate: 44100
+values: 166671
+value 12345: 4435
+"""
+from scipy.io import wavfile
+import pathlib
+PATH_HERE = pathlib.Path(__file__).parent
+PATH_DATA = PATH_HERE.joinpath("../../data")
+
+if __name__ == "__main__":
+ wavFilePath = PATH_DATA.joinpath("cant-do-that-44100.wav")
+ samplerate, data = wavfile.read(wavFilePath)
+ print(f"sample rate: {samplerate}")
+ print(f"values: {len(data)}")
+ print(f"value 12345: {data[12345]}")

src/Spectrogram.Tests/AudioFileTests.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Spectrogram.Tests
+{
+ class AudioFileTests
+ {
+ /// <summary>
+ /// Compare values read from the WAV reader against those read by Python's SciPy module (see script in /dev folder)
+ /// </summary>
+ [Test]
+ public void Test_AudioFile_KnownValues()
+ {
+ (double[] audio, int sampleRate) = AudioFile.ReadWAV("../../../../../data/cant-do-that-44100.wav", multiplier: 32_000);
+
+ Assert.AreEqual(44100, sampleRate);
+ Assert.AreEqual(166671, audio.Length);
+ Assert.AreEqual(4435, audio[12345], 1000);
+ }
+ }
+}