Adds a split_test_module XModule, that can choose one of its children
to display, based on a get_condition_for_user API added to the runtime.
To test, add something like this to an xml course, or make equivalent
tweaks in mongo.
<vertical url_name="split_test_vert">
<split_test url_name="split1" experiment_id="0" condition_id_to_child='{"0": "i4x://MITx/6.00x/html/split_test_cond0", "1": "i4x://MITx/6.00x/html/split_test_cond1"}'>
<html url_name="split_test_cond0">condition 0</html>
<html url_name="split_test_cond1">condition 1</html>
</split_test>
</vertical>
Also needs an experiment configured in the course policy json: e.g.
"user_partitions": [{"id": 0,
"name": "Experiment 0",
"description": "Unicorns?",
"version": 1,
"groups": [{"id": 0,
"name": "group 0",
"version": 1},
{"id": 1,
"name": "group 1",
"version": 1}]}]
(This particular snippet will work inside a course with org MITx
and course name 6.00x)
Co-Author: Sarina Canelake <sarina@edx.org>
Co-Author: Julia Hansbrough <julia@edx.org>
Co-Author: Diana Huang <diana@edx.org>
Co-Author: Calen Pennington <cale@edx.org>
[LMS-2095]
This requires fixing the javascript api implementation, and adding
an implementation of get_block to the ModuleSystem api.
However, the implementation is incomplete, due to mismatches between
the expectations of XModule and XBlock.
Also adds tests using the Acid block to make sure that the javascript
and python apis for children are working correctly.
