trait TestList
"""
Source of unit tests for a PonyTest object.
See package doc string for further information and example use.
"""
fun tag tests(test: PonyTest)
"""
Add all the tests in this suite to the given test object.
Typically the implementation of this function will be of the form:
```pony
fun tests(test: PonyTest) =>
test(_TestClass1)
test(_TestClass2)
test(_TestClass3)
```
"""