Add extensible requirement handling method

[ibboard]

We have a schema and a hard-coded way of loading a requirement, but to be really useful then we need an extensible model. This won't (initially) use the Plugin structure and will be done in code, but should be done in a way that adding extra requirements is easy.

The basic idea will be to have "requirement factories" that create requirement objects based on a unit type and a data string. These factories will also need registering, but should be compatible with all factory types.

[ibboard]

In [940]:

Re #351: Add extensible requirement handling method

• Add test to check type of object

[ibboard]

In [941]:

Re #351: Add extensible requirement handling method

• First refactor of extensible requirement creation
  • Needs to return different types of factory
  • Needs to handle unit types that are currently not loaded

[ibboard]

In [942]:

Re #351: Add extensible requirement handling method

• Start testing requirement factory

[ibboard]

In [943]:

Re #351: Add extensible requirement handling method

• Pass unit test (assumes units are already loaded)

[ibboard]

In [944]:

Re #351: Add extensible requirement handling method

• Test multiple unit types and limit amounts

Still needs to test invalid data and partially loaded races (which is where it'll be used most)

[ibboard]

In [945]:

Re #351: Add extensible requirement handling method

• Add handling of different requirements:
  • Multiple unit types
  • Unit types with numbers

[ibboard]

In [946]:

Re #351: Add extensible requirement handling method

• Add initial conditional to fetching of factory
• Exception if content isn't correct

[ibboard]

In [947]:

Re #351: Add extensible requirement handling method

• Add first test for failed loading

[ibboard]

In [948]:

Re #351: Add extensible requirement handling method

• Test exception messages
• Test invalid numbers

[ibboard]

In [949]:

Re #351: Add extensible requirement handling method

• Wrap exception from integer parsing

[ibboard]

In [956]:

Re #351: Add extensible requirement handling method

• Extract common IRequirementFactory interface
• Drop back to just returning IRequirement from factory to simplify generics
• Add initial registration of requirement factories

[ibboard]

In [957]:

Re #351: Add extensible requirement handling method

• Swap to using IRequirement, as per interface
• Test registration of factories

[ibboard]

In [958]:

Re #351: Add extensible requirement handling method

• Move to using registered requirement factories

[ibboard]

In [959]:

Fixes #351: Add extensible requirement handling method

• Register requirement factory for the tests