It appears the original author used chunks generated in beta 1.7.3 as a baseline test for the generator, but didn't include documentation about how to generate these chunks or include them for testing. More research is needed for this topic.
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T E S T S
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Running com.github.barteks2x.b173gen.test.TestCompareToBetaTerrain
Tests run: 8, Failures: 0, Errors: 8, Skipped: 0, Time elapsed: 1.654 sec <<< FAILURE!
test04PopulationWaterLakes(com.github.barteks2x.b173gen.test.TestCompareToBetaTerrain) Time elapsed: 1.472 sec <<< ERROR!
java.lang.IllegalArgumentException: Correct regions directory null doesn't exist