Refactor dummy version creation method

Add argument to be able to create both Version and RadioVersion
instances with the same method.

Issue: HIC-221
Change-Id: I0cc4d5fe658c4f15a650281613ba8f02718eafbd
diff --git a/crashreport_stats/tests/test_rest_endpoints.py b/crashreport_stats/tests/test_rest_endpoints.py
index 623f86a..7cef128 100644
--- a/crashreport_stats/tests/test_rest_endpoints.py
+++ b/crashreport_stats/tests/test_rest_endpoints.py
@@ -243,7 +243,7 @@
 
     @staticmethod
     def _create_dummy_version(**kwargs):
-        return Dummy.create_dummy_radio_version(**kwargs)
+        return Dummy.create_dummy_version(RadioVersion, **kwargs)
 
 
 class VersionDailyTestCase(_VersionTestCase):
@@ -348,13 +348,7 @@
 
     @staticmethod
     def _create_dummy_version(**kwargs):
-        entity = RadioVersion(
-            **Dummy.update_copy(
-                Dummy.DEFAULT_DUMMY_RADIO_VERSION_VALUES, kwargs
-            )
-        )
-        entity.save()
-        return entity
+        return Dummy.create_dummy_version(RadioVersion, **kwargs)
 
     @staticmethod
     def _create_dummy_daily_version(version, **kwargs):
diff --git a/crashreport_stats/tests/test_stats_management_command.py b/crashreport_stats/tests/test_stats_management_command.py
index 2bd5df9..d6d0221 100644
--- a/crashreport_stats/tests/test_stats_management_command.py
+++ b/crashreport_stats/tests/test_stats_management_command.py
@@ -657,7 +657,7 @@
         """
         # Create dummy version instances
         version = Dummy.create_dummy_version()
-        radio_version = Dummy.create_dummy_radio_version()
+        radio_version = Dummy.create_dummy_version(RadioVersion)
         Dummy.create_dummy_daily_version(version)
         Dummy.create_dummy_daily_radio_version(radio_version)
         Dummy.create_dummy_stats_metadata()
diff --git a/crashreport_stats/tests/utils.py b/crashreport_stats/tests/utils.py
index c7c85f8..d8f0d9d 100644
--- a/crashreport_stats/tests/utils.py
+++ b/crashreport_stats/tests/utils.py
@@ -221,40 +221,37 @@
         return archive.read(logfile_name)
 
     @staticmethod
-    def create_dummy_version(**kwargs):
+    def create_dummy_version(version_type=Version, **kwargs):
         """Create a dummy version instance.
 
         The dummy instance is created and saved to the database.
         Args:
+            version_type: The class of the version type to be created.
             **kwargs:
                 Optional arguments to extend/overwrite the default values.
 
         Returns: The created version instance.
 
-        """
-        entity = Version(
-            **Dummy.update_copy(Dummy.DEFAULT_DUMMY_VERSION_VALUES, kwargs)
-        )
-        entity.save()
-        return entity
-
-    @staticmethod
-    def create_dummy_radio_version(**kwargs):
-        """Create a dummy radio version instance.
-
-        The dummy instance is created and saved to the database.
-        Args:
-            **kwargs:
-                Optional arguments to extend/overwrite the default values.
-
-        Returns: The created radio version instance.
+        Raises:
+            ValueError: If version_type is not a valid version class type.
 
         """
-        entity = RadioVersion(
-            **Dummy.update_copy(
-                Dummy.DEFAULT_DUMMY_RADIO_VERSION_VALUES, kwargs
+        if version_type == Version:
+            entity = Version(
+                **Dummy.update_copy(Dummy.DEFAULT_DUMMY_VERSION_VALUES, kwargs)
             )
-        )
+        elif version_type == RadioVersion:
+            entity = RadioVersion(
+                **Dummy.update_copy(
+                    Dummy.DEFAULT_DUMMY_RADIO_VERSION_VALUES, kwargs
+                )
+            )
+        else:
+            raise ValueError(
+                "No dummy version instance can be created for {}".format(
+                    version_type.__name__
+                )
+            )
         entity.save()
         return entity