Add missing method impl interface

[darylrobbins]

What's changed?

• AddMissingMethodImplementation will no longer add methods to interfaces
• Added tests for AddMissingMethodImplementation

What's your motivation?

Fixes #459

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/java/migrate/AddMissingMethodImplementation.java
  • lines 18-19
  • lines 31-30

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/java/migrate/AddMissingMethodImplementation.java
  • lines 18-19
  • lines 31-30

[darylrobbins]

@timtebeek UpdateBeanManagerMethodsTest > fireEvent() is failing for both of the PR's so this doesn't look like anything to do with my changes. FWIW, the tests all pass for me locally.

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/java/migrate/AddMissingMethodImplementation.java
  • lines 18-19
  • lines 31-30

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/java/migrate/AddMissingMethodImplementation.java
  • lines 18-19
  • lines 31-30

[timtebeek]

Thanks a lot for adding the tests here in addition to fixing the underlying issue. It seems our automated PR review was thrown off a bit when correcting the imports; we expect to see the static imports added after any regular imports, whereas your IDE settings seem to put them first. No problem at all; we'll fix that on PRs as they come in. Glad to have you on board here!