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Fix XCTest entrypoint for WASI by making it async #7400

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Merged
merged 1 commit into from
Mar 14, 2024
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Fix XCTest entrypoint for WASI by making it async #7400

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15 changes: 8 additions & 7 deletions Sources/Build/BuildOperationBuildSystemDelegateHandler.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -264,17 +264,18 @@ final class TestEntryPointCommand: CustomLLBuildCommand, TestBuildCommand {
@main
@available(*, deprecated, message: "Not actually deprecated. Marked as deprecated to allow inclusion of deprecated tests (which test deprecated functionality) without warnings")
struct Runner {
#if os(WASI)
/// On WASI, we can't block the main thread, so XCTestMain is defined as async.
static func main() async {
\#(testObservabilitySetup)
await XCTMain(__allDiscoveredTests()) as Never
}
#else
static func main() {
\#(testObservabilitySetup)
#if os(WASI)
// FIXME: On WASI, XCTest uses `Task` based waiting not to block the whole process, so
// the `XCTMain` call can return the control and the process will exit by `exit(0)` later.
// This is a workaround until we have WASI threads or swift-testing, which does not block threads.
XCTMain(__allDiscoveredTests())
#else
XCTMain(__allDiscoveredTests()) as Never
#endif
}
#endif
}
"""#
)
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