[5.0][runtime] Add tests of pre-stable ABI objects with the stable ABI runtime #21479
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…time (swiftlang#21403) * [test] Fix objc_old_swift when objc/objc-internal.h is not in the SDK.
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Cherry-picked from #21403. |
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@swift-ci please smoke test |
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@apple/swift5-branch-managers This is a test-only change for Swift stable ABI. It won't actually test anything until a later flag change so it is not high priority yet. |
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@swift-ci please test |
bob-wilson
approved these changes
Dec 21, 2018
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Someday old Swift apps using the pre-stable ABI may pass their objects to OS code implemented using the stable Swift ABI and runtime. This test verifies that the new Swift runtime handles such objects correctly.
This test does nothing until we enable the intended is-Swift bit in the stable ABI. At that point this test will run by creating ObjC classes and objects with bits set to mimic the pre-stable ABI.