Add regression test checking the number of values passed to --early-s…

…topping-epsilon

tests/training/validation/test_early_stopping_epsilon_mismatch.sh

@@ -0,0 +1,33 @@
+#!/bin/bash -x
+
+#####################################################################
+# SUMMARY: Check if --early-stopping-epsilon requires the same number of values as --valid-metrics
+# AUTHOR: snukky
+# TAGS: early-stopping early-stopping-epsilon
+#####################################################################
+
+# Exit on error
+set -e
+
+# Remove old artifacts
+rm -rf eps_stop_mismatch eps_stop_mismatch.log
+mkdir -p eps_stop_mismatch
+
+# Test code goes here
+cp $MRT_MODELS/wngt19/model.small.npz eps_stop_on_1st/model.npz
+
+$MRT_MARIAN/marian \
+    --seed 2222 --no-shuffle --clip-norm 1 --maxi-batch 1 --mini-batch 32 -w 2500 \
+    -m eps_stop_mismatch/model.npz -t $MRT_DATA/europarl.de-en/corpus.small.{de,en}.gz \
+    -v $MRT_MODELS/wngt19/en-de.{spm,spm} \
+    --disp-freq 5 --valid-freq 10 --after-batches 10 \
+    --valid-metrics bleu ce-mean-words perplexity \
+    --valid-sets $MRT_MODELS/wngt19/newstest2014.{en,de} \
+    --early-stopping 4 --early-stopping-epsilon 0.5 0.1 > eps_stop_mismatch.log 2>&1 || true
+
+# Check error message
+test -e eps_stop_mismatch.log
+grep -q "early.stopping.epsilon.* must have as many values as .*valid.metrics" eps_stop_mismatch.log
+
+# Exit with success code
+exit 0