Summary:
1. Let's make the intention of the test more visible, also let's provide an example
when the error does occur.
2. `onDestroy` silence "field not nullable" warnigs not only for `View`, but for any objects, so let's use `String` (as an example of a trivial object) instead.
Original diff that introduced the test: D10024458
Reviewed By: artempyanykh
Differential Revision: D17202839
fbshipit-source-id: 037d937e4
Summary:
See motivation below.
This diff is dealing with FieldNotNullable:
- move not relevant subclasses into dedicated classes and files
- modify the tests so they comply with the standards below
--Motivation--
Gradual mode we are going to introduce is an invasive change in how Infer
treats nullability semantics.
In order to make the change in a controllable way, we need the tests to comply with the
following standards and conventions.
1. For each code peace where we expect a bug to happen, the there should be
corresponding (minimally different from above) peace of code where we expect a bug to NOT happen. (This is to ensure bug is happening for exact reason we think it is happening).
2. Conversely: for each peace of code where we expect a bug to be NOT
present, there shuold be a peace of code where the bug IS happening.
(Otherwise there can be too many reasons for a bug NOT to happen).
3. Convention: end corresponding methods IsOK and IsBUG correspondingly.
4. Keep code examples as small as possible.
Reviewed By: ngorogiannis
Differential Revision: D17183222
fbshipit-source-id: 83d03e67f
Summary:
In next diff, we are going to introduce a new mode of nullsafe
(gradual). For testing, we are going to employ the strategy used by jvillard
for Pulse.
In this diff we split tests into two subfolders, one for the default and one for the gradual
mode.
We are planning to make the gradual mode default eventually. For that, most
new features will make sense for gradual mode, and we will mostly evolve
tests for that mode.
As for 'default' mode, we need to preserve tests mostly to ensure we don't introduce
regressions.
Occasionally, we might make changes that make sense for both modes, in
this (expected relatively rare) cases we will make changes to both set
of tests.
An alternative strategy would be to have two sets of issues.exp files,
one for gradual and one for default mode. This has an advantage of each
java file to be always tested twice, but disadvantage is that it will be
harder to write meaningful test code so that it makes sense for both
modes simultaneously.
Reviewed By: ngorogiannis
Differential Revision: D17156724
fbshipit-source-id: a92a9208f
Mitya Lyubarskiy