add unittest for the convert text to labels program.

Author: csukuangfj

egs/aishell/s10b/local/convert_text_to_labels_test.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+
+# Copyright 2020 Mobvoi AI Lab, Beijing, China (author: Fangjun Kuang)
+# Apache 2.0
+
+import os
+import shutil
+import tempfile
+import unittest
+
+import kaldi
+
+
+def generate_test_lexicon(d):
+    s = 'foo f o o\n'
+    s += 'bar b a r\n'
+
+    filename = os.path.join(d, 'lexicon.txt')
+    with open(filename, 'w') as f:
+        f.write(s)
+
+
+def generate_test_tokens(d):
+    s = '''<eps> 0
+<blk> 1
+a 2
+b 3
+f 4
+o 5
+r 6
+'''
+    filename = os.path.join(d, 'tokens.txt')
+    with open(filename, 'w') as f:
+        f.write(s)
+
+
+def generate_test_text(d):
+    s = 'utt1 foo bar bar\n'
+    s += 'utt2 bar\n'
+
+    filename = os.path.join(d, 'text')
+    with open(filename, 'w') as f:
+        f.write(s)
+
+
+class ConvertTextToLablesTest(unittest.TestCase):
+
+    def test(self):
+        d = tempfile.mkdtemp()
+
+        generate_test_lexicon(d)
+        generate_test_tokens(d)
+        generate_test_text(d)
+
+        cmd = '''
+        python3 ./local/convert_text_to_labels.py \
+                --lexicon-filename {lexicon} \
+                --tokens-filename {tokens} \
+                --dir {dir}
+        '''.format(lexicon=os.path.join(d, 'lexicon.txt'),
+                   tokens=os.path.join(d, 'tokens.txt'),
+                   dir=d)
+
+        os.system(cmd)
+
+        rspecifier = 'scp:{}/labels.scp'.format(d)
+
+        reader = kaldi.SequentialIntVectorReader(rspecifier)
+
+        expected_labels = dict()
+        expected_labels['utt1'] = [3, 4, 4, 2, 1, 5, 2, 1, 5]
+        expected_labels['utt2'] = [2, 1, 5]
+
+        for key, value in reader:
+            self.assertTrue(key in expected_labels)
+            self.assertEqual(value, expected_labels[key])
+
+        reader.Close()
+
+        shutil.rmtree(d)
+
+
+if __name__ == '__main__':
+    unittest.main()