common voice preprocessor and tests, small refactoring within tests

tests/__init__.py

@@ -0,0 +1,16 @@
+import os
+
+
+def get_tests_path():
+    """Returns the path to the test directory."""
+    return os.path.dirname(os.path.realpath(__file__))
+
+
+def get_tests_input_path():
+    """Returns the path to the test data directory."""
+    return os.path.join(get_tests_path(), "inputs")
+
+
+def get_tests_output_path():
+    """Returns the path to the directory for test outputs."""
+    return os.path.join(get_tests_path(), "outputs")