[Runtime crash] running test swift project

I have a full swift app, with some unit tests. Here my BUCK file. It works fine for building and running the app on the simulator. But I got a runtime crash when I want to run the tests.

buck test :chatApp

apple_library(
  name = 'SnapKit',
  visibility = ['PUBLIC'],
  srcs = glob([
    'Pods/SnapKit/**/*.swift',
  ]),
  frameworks = [
    '$SDKROOT/System/Library/Frameworks/UIKit.framework',
    '$SDKROOT/System/Library/Frameworks/Foundation.framework'
  ],
)

apple_asset_catalog(
  name = 'GRPCAssets',
  app_icon = 'AppIcon',
  dirs = ['grpc-go-chat/Assets.xcassets'],
)


apple_resource(
  name = 'grpc-go-chatAppResources',
  files = glob(['grpc-go-chat/*.png', 'grpc-go-chat/**/*.storyboard']),
)

apple_bundle(
  name = 'chatApp',
  binary = ':grpc-go-chatAppBinary',
  extension = 'app',
  info_plist = 'grpc-go-chat/Info.plist',
  tests = [':appTests'],
  deps = [':SnapKit'],
)

apple_binary(
  name = 'grpc-go-chatAppBinary',
  deps = [':grpc-go-chatAppResources', ':SnapKit'],
  srcs = glob([
    'grpc-go-chat/**/*.swift'
  ]),
  frameworks = [
    '$SDKROOT/System/Library/Frameworks/UIKit.framework',
    '$SDKROOT/System/Library/Frameworks/Foundation.framework',
  ]
)

apple_package(
  name = 'grpc-go-chatAppPackage',
  bundle = ':chatApp',
)

apple_test(
  name = 'appTests',
  test_host_app = ':chatApp',
  info_plist = 'grpc-go-chatTests/Info.plist',
  srcs = [
    'grpc-go-chatTests/grpc_go_chatTests.swift'
  ],
  frameworks = [
    '$SDKROOT/System/Library/Frameworks/Foundation.framework',
    '$SDKROOT/System/Library/Frameworks/UIKit.framework',
    '$PLATFORM_DIR/Developer/Library/Frameworks/XCTest.framework',
  ],
)

Here the error I got :

Building... 0.4 sec
[2017-12-18 16:21:26.111][error][command:null][tid:465][com.facebook.buck.cli.Main] Uncaught exception at top level
java.lang.NullPointerException
	at java.util.Objects.requireNonNull(Objects.java:203)
	at java.util.Optional.<init>(Optional.java:96)
	at java.util.Optional.of(Optional.java:108)
	at com.facebook.buck.apple.AppleTestDescription.createTestHostInfo(AppleTestDescription.java:496)
	at com.facebook.buck.apple.AppleTestDescription.createBuildRule(AppleTestDescription.java:233)
	at com.facebook.buck.apple.AppleTestDescription.createBuildRule(AppleTestDescription.java:84)
	at com.facebook.buck.rules.DefaultTargetNodeToBuildRuleTransformer.transform(DefaultTargetNodeToBuildRuleTransformer.java:88)
	at com.facebook.buck.rules.SingleThreadedBuildRuleResolver.lambda$requireRule$0(SingleThreadedBuildRuleResolver.java:111)
	at com.facebook.buck.rules.SingleThreadedBuildRuleResolver.computeIfAbsent(SingleThreadedBuildRuleResolver.java:84)
	at com.facebook.buck.rules.SingleThreadedBuildRuleResolver.requireRule(SingleThreadedBuildRuleResolver.java:107)
	at com.facebook.buck.swift.SwiftLibraryDescription.createCompanionBuildRule(SwiftLibraryDescription.java:391)
	at com.facebook.buck.apple.AppleLibraryDescription.lambda$requireSingleArchUnstrippedBuildRule$8(AppleLibraryDescription.java:587)
	at java.util.Optional.flatMap(Optional.java:241)
	at com.facebook.buck.apple.AppleLibraryDescription.requireSingleArchUnstrippedBuildRule(AppleLibraryDescription.java:585)
	at com.facebook.buck.apple.AppleLibraryDescription.requireUnstrippedBuildRule(AppleLibraryDescription.java:546)
	at com.facebook.buck.apple.AppleLibraryDescription.createLibraryBuildRule(AppleLibraryDescription.java:441)
	at com.facebook.buck.apple.AppleTestDescription.createTestLibraryRule(AppleTestDescription.java:411)
	at com.facebook.buck.apple.AppleTestDescription.createBuildRule(AppleTestDescription.java:251)
	at com.facebook.buck.apple.AppleTestDescription.createBuildRule(AppleTestDescription.java:84)
	at com.facebook.buck.rules.DefaultTargetNodeToBuildRuleTransformer.transform(DefaultTargetNodeToBuildRuleTransformer.java:88)
	at com.facebook.buck.rules.SingleThreadedBuildRuleResolver.lambda$requireRule$0(SingleThreadedBuildRuleResolver.java:111)
	at com.facebook.buck.rules.SingleThreadedBuildRuleResolver.computeIfAbsent(SingleThreadedBuildRuleResolver.java:84)
	at com.facebook.buck.rules.SingleThreadedBuildRuleResolver.requireRule(SingleThreadedBuildRuleResolver.java:107)
	at com.facebook.buck.rules.ActionGraphCache$2.visit(ActionGraphCache.java:330)
	at com.facebook.buck.rules.ActionGraphCache$2.visit(ActionGraphCache.java:327)
	at com.facebook.buck.graph.AbstractBottomUpTraversal.traverse(AbstractBottomUpTraversal.java:36)
	at com.facebook.buck.rules.ActionGraphCache.createActionGraphSerially(ActionGraphCache.java:332)
	at com.facebook.buck.rules.ActionGraphCache.createActionGraph(ActionGraphCache.java:264)
	at com.facebook.buck.rules.ActionGraphCache.getActionGraph(ActionGraphCache.java:167)
	at com.facebook.buck.rules.ActionGraphCache.getActionGraph(ActionGraphCache.java:68)
	at com.facebook.buck.cli.TestCommand.runWithoutHelp(TestCommand.java:549)
	at com.facebook.buck.cli.AbstractCommand.run(AbstractCommand.java:232)
	at com.facebook.buck.cli.AbstractContainerCommand.run(AbstractContainerCommand.java:79)
	at com.facebook.buck.cli.BuckCommand.run(BuckCommand.java:82)
	at com.facebook.buck.cli.Main.runMainWithExitCode(Main.java:1101)
	at com.facebook.buck.cli.Main.runMainThenExit(Main.java:395)
	at com.facebook.buck.cli.Main.nailMain(Main.java:1855)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.martiansoftware.nailgun.NGSession.run(NGSession.java:329)

In my tests I need to import my app to test the API like this:

@testable import grpc_go_chat

[RAM237]

I am facing the same right now and really upset about it… 😦

[pomozoff]

@v-jizhang, that would be great!