Xcode 7 code coverage reporting not working

Question

I'm having problems to get code coverage reporting working in Xcode 7 for a certain iOS project.

I'm following the instructions given here: http://mgrebenets.github.io/mobile%20ci/2015/09/21/code-coverage-for-ios-xcode-7/

Of the three projects I tried, two are working fine, but one project is giving me a headache. When using llvm-cov utility to generate a report from the gathered profile data like this:

xcrun llvm-cov report -instr-profile Coverage.profdata MyAppBinary 

I receive the error message:

error: Failed to load coverage: The file was not recognized as a valid object file

I checked that the "Gather coverage data" is enabled for the Test scheme. I also checked that the -fprofile-instr-generate and -fcoverage-mapping compiler options are passed to clang.

File sizes and types also look valid to me:

ilMac:llvm-cov-test ilja$ ls -la
total 61976
drwxr-xr-x   4 ilja  staff       136 14 Okt 21:53 .
drwxr-xr-x+ 75 ilja  staff      2550 14 Okt 16:31 ..
-rw-r--r--   1 ilja  staff   1797416 14 Okt 21:53 Coverage.profdata
-rwxr-xr-x   1 ilja  staff  29932040 14 Okt 16:32 MyAppBinary

ilMac:llvm-cov-test ilja$ file Coverage.profdata 
Coverage.profdata: data

ilMac:llvm-cov-test ilja$ file MyAppBinary 
MyAppBinary: Mach-O universal binary with 2 architectures
MyAppBinary (for architecture i386):    Mach-O executable i386
MyAppBinary (for architecture x86_64):  Mach-O 64-bit executable x86_64

I also noted that the "Coverage" tab in Xcode for the Test run is saying "No coverage data" instead of the indicator bars.

Any idea what I'm doing wrong?

Answer 1

Posting my solution in case someone will need it. Following this article code coverage xcode 7 I did following steps:

1. Installed cobertura plugin
2. Installed slather plugin
3. Enabled code coverage for project (in schema preferences)
4. In jenkins added execute shell command

/usr/bin/xcodebuild test -workspace MyApp.xcworkspace -scheme MyAppTests -configuration DebugMyApp -destination "platform=iOS Simulator,OS=9.3,name=iPhone 6" -enableCodeCoverage YES

5. Then one more build stem for slather

slather coverage \ --input-format profdata \ --cobertura-xml \ --ignore "../**/*/Xcode*" \ --output-directory slather-report \ --scheme MyAppTests \ --workspace MyApp.xcworkspace \ MyApp.xcodeproj

6. And last but no least add post build step "publich cobertura report" Cobertura xml report pattern - slather-report/cobertura.xml
7. Enjoy :)