Test framework: simplified AI logic and tests, added usage comments. Devs recommendations:

* in card's code use player.isComputer instead player.isHuman (it help to split Human/AI logic and test both by unit tests);
* usage example: AI hint to skip or auto-calculate choices instead call of real choose dialogs;
* unit tests for Human logic: call normal commands;
* unit tests for AI logic: call aiXXX commands;

Mage/src/main/java/mage/abilities/AbilityImpl.java

@@ -319,7 +319,7 @@ public abstract class AbilityImpl implements Ability {
         // unit tests only: it allows to add targets/choices by two ways:
         // 1. From cast/activate command params (process it here)
         // 2. From single addTarget/setChoice, it's a preffered method for tests (process it in normal choose dialogs like human player)
-        if (controller.isTestMode()) {
+        if (controller.isTestsMode()) {
             if (!controller.addTargets(this, game)) {
                 return false;
             }

Mage/src/main/java/mage/abilities/keyword/AssistAbility.java

@@ -94,8 +94,9 @@ public class AssistAbility extends SimpleStaticAbility implements AlternateManaP
         }
 
         // AI can't use assist (can't ask another player to help), maybe in teammode it can be enabled, but tests must works all the time
+        // Outcome.AIDontUseIt
         Player controller = game.getPlayer(source.getControllerId());
-        if (controller != null && !controller.isTestMode() && !controller.isHuman()) {
+        if (controller != null && controller.isComputer()) {
             return options;
         }
 
@@ -170,7 +171,7 @@ class AssistEffect extends OneShotEffect {
         if (controller != null && spell != null && targetPlayer != null) {
             // AI can't assist other players, maybe for teammates only (but tests must work as normal)
             int amountToPay = 0;
-            if (targetPlayer.isHuman() || targetPlayer.isTestMode()) {
+            if (!targetPlayer.isComputer()) {
                 amountToPay = targetPlayer.announceXMana(0, unpaid.getMana().getGeneric(),
                         "How much mana to pay as assist for " + controller.getName() + "?", game, source);
             }

Mage/src/main/java/mage/game/GameImpl.java

@@ -1418,7 +1418,7 @@ public abstract class GameImpl implements Game, Serializable {
                                     + ex.getMessage());
                         }
                         Player activePlayer = this.getPlayer(getActivePlayerId());
-                        if (activePlayer != null && !activePlayer.isTestMode()) {
+                        if (activePlayer != null && !activePlayer.isTestsMode()) {
                             errorContinueCounter++;
                             continue;
                         } else {

Mage/src/main/java/mage/players/Player.java

@@ -48,8 +48,32 @@ import java.util.*;
  */
 public interface Player extends MageItem, Copyable<Player> {
 
+    /**
+     * Current player is real life player (human). Try to use in GUI and network engine only.
+     *
+     * WARNING, you must use isComputer instead isHuman in card's code (for good Human/AI logic testing in unit tests)
+     * TODO: check combat code and other and replace isHuman to isComputer usage if possible (if AI support that actions)
+     * @return
+     */
     boolean isHuman();
 
+    boolean isTestsMode();
+
+    /**
+     * Current player is AI. Use it in card's code and all other places.
+     *
+     * It help to split Human/AI logic and test both by unit tests.
+     *
+     * Usage example: AI hint to skip or auto-calculate choices instead call of real choose dialogs
+     * - unit tests for Human logic: call normal commands
+     * - unit tests for AI logic: call aiXXX commands
+     *
+     * @return
+     */
+    default boolean isComputer() {
+        return !isHuman();
+    }
+
     String getName();
 
     String getLogName();
@@ -314,8 +338,6 @@ public interface Player extends MageItem, Copyable<Player> {
 
     void setGameUnderYourControl(boolean value, boolean fullRestore);
 
-    boolean isTestMode();
-
     void setTestMode(boolean value);
 
     void addAction(String action);

Mage/src/main/java/mage/players/PlayerImpl.java

@@ -2715,7 +2715,7 @@ public abstract class PlayerImpl implements Player, Serializable {
         }
 
         // only humans can use it
-        if (!targetPlayer.isHuman() && !targetPlayer.isTestMode()) {
+        if (targetPlayer.isComputer()) {
             return false;
         }
 
@@ -3866,7 +3866,7 @@ public abstract class PlayerImpl implements Player, Serializable {
     }
 
     @Override
-    public boolean isTestMode() {
+    public boolean isTestsMode() {
         return isTestMode;
     }