Recipe to add missing `@Test` annotations

What problem are you trying to solve?

Find and fix test cases which are forgotten and thus are not executed.

Some heuristics is probably needed to determine if given method is indeed a test case and not some helper method.

This is relevant to JUnit 4+ which uses annotations to determine if something is a test case.
(Possibly other test frameworks use the same approach and the recipe could cover them too).

Describe the situation before applying the recipe

    void testAddition() {
        int result = calculator.add(2, 3);
        Assertions.assertEquals(5, result);
    }

Describe the situation after applying the recipe

    @Test
    void testAddition() {
        int result = calculator.add(2, 3);
        Assertions.assertEquals(5, result);
    }

OSS repro

• https://github.com/crosswire/jsword/pull/144/files
• https://github.com/qos-ch/logback/pull/576/files

Start by examining the two OSS reproduction pull requests linked in the issue and compare the forgotten test methods with nearby helper methods. Define the heuristics for JUnit 4+ test methods, then implement a recipe that adds @Test only where appropriate and verify that helper methods remain unchanged.