如何为我的 Objective-C 应用程序获得 Xcode 的代码覆盖率？

Question

I need code coverage for my iPhone app.

How do I get code coverage for Xcode 4?

Answer 1

I have an entry on my blog which covers this exact topic.

It provides a step-by-step guide on how to enable GCOV in Xcode 4 as well as how to use CoverStory for displaying the results.

Answer 2

These steps will help.

1. Create a new build configuration ('Coverage'), duplicated from the 'Debug' configuration.

2. Open up build settings for the main target, make sure your new configuration is selected, and:

    Enable “Generate Test Coverage Files” Enable “Instrument Program Flow” Add “-lgcov” to “Other Linker Flags”

3. Compile application with Coverage mode.

4. Check.gcno files from your application bundle folder.

   Coverage-iphonesimulator/applicationname.build/Objects-normal

   open.gcno files with CoverStory. Download CoverStory from
   http://code.google.com/p/coverstory/downloads/list

Reference Sites

• http://atastypixel.com/blog/unit-testing-and-coverage-with-xcode/
• http://milesdennis.blogspot.co.uk/2011/04/code-coverage-in-xcode-4.html

Answer 3

I couldn't find a good example of this, so hopefully this will help someone else.

If you want to generate HTML from your code coverage (once you get your.gcda files generated), you can install lcov and use these commands:

function generate-codecoverage-html() {
    if [[ $1 == "-h" || ! $# -eq 2 ]]; then
        echo "    usage: $0 path/to/codecoverage/dir/ path/to/htmldir/"
        return
    fi

    timestamp=$(date)
    tmpfile="/tmp/codecoverage.info-$date"
    lcov --no-checksum --directory "$1" --capture --output-file "$tmpfile"
    genhtml --output-directory  "$2" "$tmpfile"
}