use one testing sentence in tts tests

tests/tts_tests/test_align_tts_train.py

@@ -23,6 +23,9 @@ config = AlignTTSConfig(
     epochs=1,
     print_step=1,
     print_eval=True,
+    test_sentences=[
+        "Be a voice, not an echo.",
+    ],
 )
 config.audio.do_trim_silence = True
 config.audio.trim_db = 60

tests/tts_tests/test_glow_tts_train.py

@@ -24,6 +24,9 @@ config = GlowTTSConfig(
     epochs=1,
     print_step=1,
     print_eval=True,
+    test_sentences=[
+        "Be a voice, not an echo.",
+    ],
 )
 config.audio.do_trim_silence = True
 config.audio.trim_db = 60

tests/tts_tests/test_speedy_speech_train.py

@@ -23,6 +23,9 @@ config = SpeedySpeechConfig(
     epochs=1,
     print_step=1,
     print_eval=True,
+    test_sentences=[
+        "Be a voice, not an echo.",
+    ],
 )
 config.audio.do_trim_silence = True
 config.audio.trim_db = 60

tests/tts_tests/test_tacotron2_train.py

@@ -23,6 +23,9 @@ config = Tacotron2Config(
     test_delay_epochs=-1,
     epochs=1,
     print_step=1,
+    test_sentences=[
+        "Be a voice, not an echo.",
+    ],
     print_eval=True,
     max_decoder_steps=50,
 )

tests/tts_tests/test_tacotron_train.py

@@ -22,6 +22,9 @@ config = TacotronConfig(
     test_delay_epochs=-1,
     epochs=1,
     print_step=1,
+    test_sentences=[
+        "Be a voice, not an echo.",
+    ],
     print_eval=True,
     r=5,
     max_decoder_steps=50,