Windows compatibility

[andreroggeri]

This error is ocurring while parsing a cobertura.xml file.

I'm using the following command to get the coverage diff:

git diff develop...HEAD | diff-test-coverage -c coverage/cobertura-coverage.xml -t cobertura --

lcov file doesn't work, I get the "No coverage information found for any of the new lines in the diff." message.

git diff develop...HEAD | diff-test-coverage -c coverage/lcov.info -t lcov --

Is there anything wrong with my setup ?

PS: I already tried to increase the node max memory, but still the same error

[marklagendijk]

Can you paste the full error output you get? Even with out of memory errors, it normally includes the line that caused the issue.

When you get an out of memory issue it is caused by either a big diff, a big coverage file or a combination of both.

You can try writing the diff to a file, to see how big it is: git diff develop...HEAD > develop.diff.

It may help to start with something simple. For example:

1. Do a simple change in a file which you know is covered by tests.
2. Do not commit. Instead just run git diff and verify that you see your change there.
3. Call diff-test-coverage with this diff: git diff | diff-test-coverage ARGS. Make sure you execute the command from the root of your repository.

[andreroggeri]

This is the output that I get on the console. (I'll check the other points later!)

<--- Last few GCs --->

[8964:000002424A4F2570]    13235 ms: Mark-sweep 1218.1 (1271.6) -> 1218.1 (1271.6) MB, 1392.4 / 0.0 ms  allocation failure GC in old space requested
[8964:000002424A4F2570]    14681 ms: Mark-sweep 1218.1 (1271.6) -> 1218.1 (1240.6) MB, 1445.5 / 0.0 ms  last resort GC in old space requested
[8964:000002424A4F2570]    16159 ms: Mark-sweep 1218.1 (1240.6) -> 1218.1 (1240.6) MB, 1478.0 / 0.0 ms  last resort GC in old space requested


<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 00000159E9A255E9 <JSObject>
    1: /* anonymous */(aka /* anonymous */) [C:\Users\andrerc\AppData\Roaming\npm\node_modules\@connectis\diff-test-coverage\node_modules\cobertura-parse\source\index.js:~31] [pc=0000007A25C4DF4D](this=000001710A4022D1 <undefined>,l=000000A934A11A51 <Object map = 000003C37108A869>)
    2: arguments adaptor frame: 3->1
    3: forEach(this=000000A934A09FA1 <JSArray[5]>)
    4: extractLcovStyleBr...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
 1: node::DecodeWrite
 2: node_module_register
 3: v8::internal::FatalProcessOutOfMemory
 4: v8::internal::FatalProcessOutOfMemory
 5: v8::internal::Factory::NewUninitializedFixedArray
 6: v8::internal::WasmDebugInfo::SetupForTesting
 7: v8::internal::interpreter::BytecodeArrayRandomIterator::UpdateOffsetFromIndex
 8: 0000007A25A843C1

[marklagendijk]

Apparently the issue happens in cobertura-parse.
Do you have a very big coverage report?
How big is your project?
What are you using to generate the coverage report?

[andreroggeri]

The project has ~16000 lines and the coverage report is generated by the angular-cli
The cobertura xml file has almost 2MB.

I used the python version of this tool with success, but I would like to use a node version to avoid asking people to install node.

[marklagendijk]

Hmm, the size shouldn't be the problem.
However, I see that you are using Windows. Probably there are some issues related to that (at least the lcov not working).
So far I have only used it on Linux environments.

If I have the time, I will look into this, this weekend.