Ticket #4 (new enhancement)

Description

PyBeast

2. Test source code mutation

Call method: shell utility invocation

testmutation mutations.py src.python.module test.python.module failed-mutation/python/module/dir

Event flow:

1. System evaluates mutations.py - the mutations list, which includes mutation weights
2. System reads src.python.module and parses into AST
3. System executes a single mutation over the AST.
4. System runs test.python.module over the mutated and compiled AST. If tests didn't caught an change, system dumps mutated code into failed-mutation/python/module/dir

Timings:

1. Parse and mutation generation over the complete body of PyBeast should take less than 1 sec.
2. Complete process of testing a single PyBeast mutation should take less than 1 minute.

Tests:

1. Test AST mutation, test fails.