Why?

• Schema and class are defined in the same place
• Less noisy and verbose that field decorators
• Schema can be separated from the class, and created without a class
• Type safety ensure schema output matches intended field type
• Provide some reassurance that if x instanceof SomeDataClass, then x conforms to the schema of SomeClass. Removes the need to consider whether x needs to be validated again.

How to run the tests in WebStorm

Remember to add --require require-ts-node.js to Extra Mocha Options in the runner config screen