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JUnit Platform Parallel Execution
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todos.md

Parallel Execution

  • TreeWalker that generates execution plan (ExecutionMode and ResourceLock per Node) in HierarchicalTestExecutor
    • 1st pass: ExecutionMode and ResourceLock on Node
    • 2nd pass: Pull up ResourceLocks to first Node with ResourceLock, remove ResourceLocks from children, force ExecutionMode to Same_Thread
      • Optional optimization: Only pull up locks when ResourceLock order in descendants is not compatible
    • 2nd pass (?): Inherit ExecutionMode to children
  • Thread-safe listeners
  • Decide on config parameters (factor?)
  • Capture stdout/stderr
    • Optimize case when no parallel execution takes place to capture all stdout/stderr, not just from same thread?
  • Define a few basic resources (e.g. stdout, stderr, system properties, etc.)
  • @ThreadSafe annotation and warning for non-thread-safe listeners
  • Implicit Global read lock for all tests?
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