bug in test

[Matt Post <po...@cs.jhu.edu>]

Hi folks,

There is a bug on master that I can't figure out.

The test LmOovFeatureTest.givenInputWithDifferentOovTypes_whenDecode_thenFeaturesAreAsExpected() fails when run on Linux without KenLM. I can repeat this problem by deleting $JOSHUA/lib/libken.so, and running 

	cd $JOSHUA
	mvn test

The output is

[snip]
ERROR - Can't find libken.so (libken.dylib on OS X) on the Java library path.
WARN - sentence 0 too long 401, truncating to length 200
WARN - sentence 0 too long 401, truncating to length 200
WARN - sentence 0 too long 401, truncating to length 200
WARN - sentence 0 too long 401, truncating to length 200
Tests run: 107, Failures: 1, Errors: 0, Skipped: 12, Time elapsed: 1.89 sec <<< FAILURE! - in TestSuite
givenInputWithDifferntOovTypes_whenDecode_thenFeaturesAreAsExpected(org.apache.joshua.system.LmOovFeatureTest)  Time elapsed: 0.016 sec  <<< FAILURE!
java.lang.IndexOutOfBoundsException: Index: 1, Size: 0
	at org.apache.joshua.system.LmOovFeatureTest.decode(LmOovFeatureTest.java:66)
	at org.apache.joshua.system.LmOovFeatureTest.givenInputWithDifferntOovTypes_whenDecode_thenFeaturesAreAsExpected(LmOovFeatureTest.java:59)


Results :

Failed tests: 
  LmOovFeatureTest.givenInputWithDifferntOovTypes_whenDecode_thenFeaturesAreAsExpected:59->decode:66 » IndexOutOfBounds

Tests run: 105, Failures: 1, Errors: 0, Skipped: 10

However, if I run Joshua manually on this test in either of the following ways, the test works fine:

1.

	cd $JOSHUA
	echo a chat-rooms full | joshua -config resources/lm_oov/joshua.config  -outputformat "%f | %c"

2.

	cd $JOSHUA
	mvn -Dtest=LmOovFeatureTest test

Finally, the error doesn't make sense: there is nothing to do with arrays on the specified lines, and I don't see where an IndexOutOfBoundsException could be coming from.

Does anyone have any ideas what is going on?

matt