swift-test doesn't find xctest bundle with swiftbuild

[dschaefer2]

Is it reproducible with SwiftPM command-line tools: swift build, swift test, swift package etc?

• Confirmed reproduction steps with SwiftPM CLI. The description text must include reproduction steps with either of command-line SwiftPM commands, swift build, swift test, swift package etc.

Description

swift-test is using the old native build path layout to find the xctest bundle when used with --build-system swiftbuild

Expected behavior

swift-test should run the tests.

Actual behavior

I'm getting an error:

swiftpm_testing_helper/Entrypoint.swift:29: Fatal error: Failed to open test bundle at path /Users/dschaefer/swift/douglib/.build/arm64-apple-macosx/debug/douglibPackageTests.xctest/Contents/MacOS/douglibPackageTests: dlopen(/Users/dschaefer/swift/douglib/.build/arm64-apple-macosx/debug/douglibPackageTests.xctest/Contents/MacOS/douglibPackageTests, 0x0101)

it's actually at the following with swiftbuild.

.build/arm64-apple-macosx/Products/Debug/douglibPackageTests.xctest/Contents/MacOS/douglibPackageTests

Steps to reproduce

Run swift test --build-system swiftbuild, or swift-test until the initial PR lands.

Swift Package Manager version/commit hash

No response

Swift & OS version (output of swift --version ; uname -a)

No response

[dschaefer2]

Interesting. swift-run does find the executable to run. We need to find out why swift-test doesn't use the same technique.

[dschaefer2]

BTW, this is with a simple project created with swift package init.

[bkhouri]

I potential fix is included in #8276

[dschaefer2]

@bkhouri can you break that out into a separate change? I'd like to review that separate from the rest of 8276. In theory we can fix that now.

[bkhouri]

@dschaefer2 : here's the PR #8298.