Export all public version classes on package level

mozilla_version/__init__.py

@@ -1 +1,12 @@
 """Defines characteristics of Mozilla's version numbers."""
+
+from mozilla_version.gecko import (
+    DeveditionVersion,
+    FennecVersion,
+    FirefoxVersion,
+    GeckoVersion,
+    GeckoSnapVersion,
+    ThunderbirdVersion,
+)
+from mozilla_version.maven import MavenVersion
+from mozilla_version.mobile import MobileVersion

mozilla_version/test/test_default_imports.py

@@ -0,0 +1,17 @@
+import pytest
+
+import mozilla_version
+
+
+@pytest.mark.parametrize('version_type', [
+    'DeveditionVersion',
+    'FennecVersion',
+    'FirefoxVersion',
+    'GeckoVersion',
+    'GeckoSnapVersion',
+    'MavenVersion',
+    'MobileVersion',
+    'ThunderbirdVersion',
+])
+def test_(version_type):
+    getattr(mozilla_version, version_type)

tox.ini

@@ -43,7 +43,7 @@ commands =
 
 [flake8]
 max-line-length = 99
-exclude = .ropeproject,.tox,sandbox,docs,.eggs,*.egg,*.egg-info,setup.py,build/,mozilla_version/test/
+exclude = .ropeproject,.tox,sandbox,docs,.eggs,*.egg,*.egg-info,setup.py,build/,mozilla_version/__init__.py,mozilla_version/test/
 show-source = True
 
 [pytest]