Fix unittest adapters

lib/junit_adapter.rb

@@ -2,7 +2,7 @@ class JunitAdapter < TestingFrameworkAdapter
   COUNT_REGEXP = /Tests run: (\d+)/
   FAILURES_REGEXP = /Failures: (\d+)/
   SUCCESS_REGEXP = /OK \((\d+) test[s]?\)/
-  ASSERTION_ERROR_REGEXP = /java\.lang\.AssertionError:\s(.*)/
+  ASSERTION_ERROR_REGEXP = /java\.lang\.AssertionError:\s(.​*)|org\.junit\.ComparisonFailure:\s(.*​)/
 
   def self.framework_name
     'JUnit'

lib/py_unit_adapter.rb

@@ -11,7 +11,7 @@ class PyUnitAdapter < TestingFrameworkAdapter
     count = COUNT_REGEXP.match(output[:stderr]).captures.first.to_i
     matches = FAILURES_REGEXP.match(output[:stderr])
     failed = matches ? matches.captures.try(:first).to_i : 0
-    error_matches = ASSERTION_ERROR_REGEXP.match(output[:stderr]).captures
+    error_matches = ASSERTION_ERROR_REGEXP.match(output[:stderr]).try(:captures) || []
     {count: count, failed: failed, error_messages: error_matches}
   end
 end