Use NEXT_TAG insted of "next" string

Author: Dimitar Topuzov

core/tns/tns.py

@@ -17,6 +17,10 @@
 
 
 class Tns(object):
+    # npm tag used when we publish master branch of https://github.com/NativeScript/NativeScript
+    # Please see https://github.com/NativeScript/NativeScript/blob/master/.travis.yml
+    NEXT_TAG = 'internal-preview'
+
     @staticmethod
     def __get_platform_string(platform=Platforms.NONE):
         if platform is Platforms.NONE:
@@ -107,7 +111,7 @@ def update_modules(path, tns_path=None):
         # In master branch we use @next packages.
         else:
             Tns.plugin_remove("tns-core-modules", attributes={"--path": path}, assert_success=False, tns_path=tns_path)
-            output = Tns.plugin_add("tns-core-modules@next", attributes={"--path": path}, tns_path=tns_path)
+            output = Tns.plugin_add("tns-core-modules@" + Tns.NEXT_TAG, attributes={"--path": path}, tns_path=tns_path)
         assert "undefined" not in output, "Something went wrong when modules are installed."
         assert "ERR" not in output, "Something went wrong when modules are installed."
         return output
@@ -259,15 +263,15 @@ def plugin_add(name, attributes={}, log_trace=False, assert_success=True, tns_pa
         output = Tns.run_tns_command("plugin add " + name, attributes=attributes, log_trace=log_trace,
                                      tns_path=tns_path)
         if assert_success:
-            assert "Successfully installed plugin {0}".format(name.replace("@next", "")) in output
+            assert "Successfully installed plugin {0}".format(name.replace("@" + Tns.NEXT_TAG, "")) in output
         return output
 
     @staticmethod
     def plugin_remove(name, attributes={}, log_trace=False, assert_success=True, tns_path=None):
         output = Tns.run_tns_command("plugin remove " + name, attributes=attributes, log_trace=log_trace,
                                      tns_path=tns_path)
         if assert_success:
-            assert "Successfully removed plugin {0}".format(name.replace("@next", "")) in output
+            assert "Successfully removed plugin {0}".format(name.replace("@" + Tns.NEXT_TAG, "")) in output
         return output
 
     @staticmethod

tests/build/PlatformAndroid_Tests.py

@@ -48,8 +48,8 @@ def test_130_platform_remove_and_platform_add_android_custom_version(self):
         Tns.platform_remove(platform=Platforms.ANDROID, attributes={"--path": self.app_name})
 
         # Add custom version with tag
-        Tns.platform_add_android(version="next", attributes={"--path": self.app_name})
-        TnsAsserts.package_json_contains(self.app_name, ["next"])
+        Tns.platform_add_android(version=Tns.NEXT_TAG, attributes={"--path": self.app_name})
+        TnsAsserts.package_json_contains(self.app_name, [Tns.NEXT_TAG])
         # tns-android@next package include 'next' as string in version
 
     def test_200_platform_update_android(self):