Test for Issue 374.

Mage.Tests/src/test/java/org/mage/test/cards/triggers/ManabarbsTest.java

@@ -0,0 +1,38 @@
+package org.mage.test.cards.triggers;
+
+import mage.Constants;
+import org.junit.Test;
+import org.mage.test.serverside.base.CardTestBase;
+
+/**
+ * @author ayratn
+ *
+ * Card: Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.
+ */
+public class ManabarbsTest extends CardTestBase {
+
+    /**
+     * Issue 374: manabarb enchantment
+     * Games goes into a freeze loop.
+     *
+     * version: 0.8.1
+     *
+     * Couldn't reproduce.
+     */
+    @Test
+    public void testMultiTriggers() {
+        addCard(Constants.Zone.BATTLEFIELD, playerA, "Manabarbs");
+        addCard(Constants.Zone.BATTLEFIELD, playerA, "Mountain", 7);
+        addCard(Constants.Zone.HAND, playerA, "Lightning Elemental");
+        addCard(Constants.Zone.HAND, playerA, "Ball Lightning");
+
+        castSpell(playerA, "Ball Lightning");
+        castSpell(playerA, "Lightning Elemental");
+
+        execute();
+        assertLife(playerA, 13); // burns from Manabarbs
+        assertLife(playerB, 10); // ai should attack with 4/1 + 6/1
+        assertPermanentCount(playerA, "Lightning Elemental", 1);
+        assertPermanentCount(playerA, "Ball Lightning", 0); // sacrificed at EOT
+    }
+}

Mage.Tests/src/test/java/org/mage/test/serverside/base/impl/CardTestAPIImpl.java

@@ -118,6 +118,9 @@ public abstract class CardTestAPIImpl extends MageTestBase implements CardTestAP
 		if (gameZone.equals(Constants.Zone.BATTLEFIELD)) {
 			for (int i = 0; i < count; i++) {
 				Card card = Sets.findCard(cardName, true);
+                if (card == null) {
+                    throw new IllegalArgumentException("[TEST] Couldn't find a card: " + cardName);
+                }
 				PermanentCard p = new PermanentCard(card, null);
 				p.setTapped(tapped);
 				if (player.equals(playerA)) {