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Test:Capture output on fork test failures #3052

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Aug 17, 2023
Merged

Test:Capture output on fork test failures #3052

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13 changes: 12 additions & 1 deletion spec/support/synchronization_helpers.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -25,13 +25,24 @@ def expect_in_fork(fork_expectations: nil, timeout_seconds: 10)
# Enforce timeout to ensure test fork doesn't hang the test suite.
_, status = try_wait_until(seconds: timeout_seconds) { Process.wait2(pid, Process::WNOHANG) }

stdout = File.read(fork_stdout.path)
stderr = File.read(fork_stderr.path)

# Capture forked execution information
result = { status: status, stdout: File.read(fork_stdout.path), stderr: File.read(fork_stderr.path) }
result = { status: status, stdout: stdout, stderr: stderr }

# Expect fork and assertions to have completed successfully.
fork_expectations.call(**result)

result
rescue => e
stdout ||= File.read(fork_stdout.path)
stderr ||= File.read(fork_stderr.path)

puts stdout
warn stderr

raise e
ensure
fork_stdout.unlink
fork_stderr.unlink
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