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Implementing Unit Testing with iOS

I've followed this tutorial to setup unit testing on my app when I got a little stuck.

At bullet point 8 in that tutorial it shows this image, which is what I should be expecting when I build: alt text http://developer.apple.com/library/ios/documentation/Xcode/Conceptual/iphone_development/art/logic_test_failure_text_editor.jpg

However this isn't what I get when I build. I get this error message: Command /bin/sh failed with exit code 1 as well as the error message the unit test has created. Then, when I expand on the first error I get this:

PhaseScriptExecution "Run Script" "build/3D Pool.build/Debug-iphonesimulator/LogicTests.build/Script-1A6BA6AE10F28F40008AC2A8.sh" cd "/Users/james/Desktop/FYP/3D Pool" setenv ACTION build setenv ALTERNATE_GROUP staff ... setenv XCODE_VERSION_MAJOR 0300 setenv XCODE_VERSION_MINOR 0320 setenv YACC /Developer/usr/bin/yacc /bin/sh -c "\"/Users/james/Desktop/FYP/3D Pool/build/3D Pool.build/Debug-iphonesimulator/LogicTests.build/Script-1A6BA6AE10F28F40008AC2A8.sh\""  /Developer/Tools/RunPlatformUnitTests.include:412: note: Started tests for architectures 'i386' /Developer/Tools/RunPlatformUnitTests.include:419: note: Running tests for architecture 'i386' (GC OFF) objc[12589]: GC: forcing GC OFF because OBJC_DISABLE_GC is set Test Suite '/Users/james/Desktop/FYP/3D Pool/build/Debug-iphonesimulator/LogicTests.octest(Tests)' started at 2010-01-04 21:05:06 +0000 Test Suite 'LogicTests' started at 2010-01-04 21:05:06 +0000 Test Case '-[LogicTests testFail]' started. /Users/james/Desktop/FYP/3D Pool/LogicTests.m:17: error: -[LogicTests testFail] : Must fail to succeed. Test Case '-[LogicTests testFail]' failed (0.000 seconds). Test Suite 'LogicTests' finished at 2010-01-04 21:05:06 +0000. Executed 1 test, with 1 failure (0 unexpected) in 0.000 (0.000) seconds  Test Suite '/Users/james/Desktop/FYP/3D Pool/build/Debug-iphonesimulator/LogicTests.octest(Tests)' finished at 2010-01-04 21:05:06 +0000. Executed 1 test, with 1 failure (0 unexpected) in 0.000 (0.002) seconds  /Developer/Tools/RunPlatformUnitTests.include:448: error: Failed tests for architecture 'i386' (GC OFF) /Developer/Tools/RunPlatformUnitTests.include:462: note: Completed tests for architectures 'i386' Command /bin/sh failed with exit code 1 

Now this is very odd as it is running the tests (and succeeding as you can see my STFail firing) because if I add a different test which passes I get no errors, so the tests are working fine. But why am I getting this extra build fail?

It may also be of note that when downloading solutions/templates which should work out the box, I get the same error. I'm guessing I've set something up wrong here but I've just followed a tutorial 100% correctly!

EDIT: According to this blog, this post and a few other websites, I'm not the only one getting this problem. It has been like this since the release of xCode 3.2, assuming the apple dev center documents and tutorials etc are pre-3.2 as well.

However some say its a known issue whereas others seem to think this was intentional. I for one would like both the extended console and in code messages, and I certainly do not like the "Command /bin/sh..." error and really think they would have documented such an update. Hopefully it will be fixed soon anyway.

UPDATE: Here's confirmation it's something changed since the release of xCode 3.2.1.

This image: alt text http://ing0.co.uk/info/pics/unittest-xcode-3.2.1.png is from my test build using 3.2.1. This one is from an older version (3.1.4): alt text http://ing0.co.uk/info/pics/unittest-xcode-3.1.4.png. (The project for both was unchanged).

like image 401
ingh.am Avatar asked Jan 04 '10 21:01

ingh.am


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What is unit testing in iOS?

A unit test is a function you write that tests something about your app. A good unit test is small. It tests just one thing in isolation. For example, if your app adds up the total amount of time your user spent doing something, you might write a test to check if this total is correct.

How do I run unit test in Xcode?

Adding a unit test in XcodeGo to File > New > Target. Select iOS Unit Testing Bundle and then click Next. When you create a new Unit Test target for your project, it consists of a template class.

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2 Answers

Double click 'Run script' under 'Targets'/'Your script target name' then type

 # Run the unit tests in this test bundle.  "${SYSTEM_DEVELOPER_DIR}/Tools/RunUnitTests" 1> /tmp/RunUnitTests.out 

Basically you need to append

 1> /tmp/RunUnitTests.out 

to what is already there

like image 75
Anton Avatar answered Oct 02 '22 09:10

Anton


Have you tried to set the build configuration to "Debug" for the test case ?

i did that, as shown at http://nothing2fancy.com/2009/08/04/failed-tests-for-architecture-i386-gc-off/ and it worked

like image 29
Thomas Joulin Avatar answered Oct 02 '22 09:10

Thomas Joulin