Child suites. See [Suite] for the hierarchy of suites.
## property: Suite.tests
- type: <[Array]<[TestCase]>>
Test cases in the suite. Note that only test cases defined directly in this suite are in the list. Any test cases defined in nested [`method: Test.describe`] groups are listed
in the child [`property: Suite.suites`].
## property: Suite.title
- type: <[string]>
Suite title.
* Empty for root suite.
* Project name for project suite.
* File path for file suite.
* Title passed to [`method: Test.describe`] for a group suite.
## method: Suite.titlePath
- returns: <[Array]<[string]>>
Returns a list of titles from the root down to this suite.