[Feature Request] Nested suites apply outer suites' setup-teardown

[strinnityk]

Problem

You can nest suites inside other suites, yet the setup and teardown operations don't behave intuitively. The reason is outer setup-teardowns don't get called when running inner suites.

Suggested solution

Nesting suites should make the outer setup and teardown be called when running tests belonging to inner suites, also wrapping the inner setup-teardowns.

Example

The following sample test:

suite "Suite 0":
  setup:
    echo "+ Setup 0"

  teardown:
    echo "- Teardown 0"

  suite "Suite 1":
    setup:
      echo "+ Setup 1"

    teardown:
      echo "- Teardown 1"

    test "x":
      echo "x"

  suite "Suite 2":
    setup:
      echo "+ Setup 2"

    teardown:
      echo "- Teardown 2"

    test "y":
      echo "y"

Would currently print the following:

+ Setup 1
x
- Teardown 1
+ Setup 2
y
- Teardown 2

Where the expected behaviour is:

+ Setup 0
+ Setup 1
x
- Teardown 1
- Teardown 0
- Setup 0
+ Setup 2
y
- Teardown 2
- Teardown 0