I’ve been trying to use XCTestExpectation (<https:...

# kotlin-native

[russhwolf]

I’ve been trying to use XCTestExpectation (https://developer.apple.com/documentation/xctest/asynchronous_tests_and_expectations/testing_asynchronous_operations_with_expectations?language=objc) from Kotlin/Native but having symbol-not-found issues. I suspect a cinterop problem but could use some hints. Details in thread

[russhwolf]

Error looks like the following:

> Task :linkTestDebugExecutableMacos FAILED
Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_XCTWaiter", referenced from:
      objc-class-ref in combined.o
  "_OBJC_CLASS_$_XCTestExpectation", referenced from:
      objc-class-ref in combined.o
ld: symbol(s) not found for architecture x86_64
error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld invocation reported errors

My repo is here: https://github.com/russhwolf/xctest-playground
gradle cinterop setup: https://github.com/russhwolf/xctest-playground/blob/master/build.gradle#L21-L31
def file: https://github.com/russhwolf/xctest-playground/blob/master/src/nativeInterop/cinterop/xctest.def
unit test: https://github.com/russhwolf/xctest-playground/blob/master/src/macosTest/kotlin/sample/SampleTests.kt



I don’t think I really know my way around cinterop yet and was having trouble finding samples using objective-c frameworks, but was trying to follow this issue as a guide: https://github.com/JetBrains/kotlin-native/issues/1764

[Sam]

You're missing a linkerOpts line in your xctest.def file. I'm not sure what it should be though.

[olonho]

Same as for C/Objective-C, usually

[russhwolf]

I’m not sure what that is though. From the discussion I linked I might have guessed that I need

compilerOpts = -framework XCTest
linkerOpts = -framework XCTest

but that just gets me to

> Task :linkTestDebugExecutableMacos FAILED
ld: framework not found XCTest

[Dico]

Look up clang linker options.

[olonho]

seems /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks/XCTest.framework/Versions/A/XCTest got needed sysmbol, thus smth like -F /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks/ -framework XCTest

[Sam]

Although one can’t always assume that is the path Xcode is at. People often have multiple versions installed and may change it around.