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tests: added tests for non-stack delayed trigger and details docs about problem

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This commit is contained in:
Oleg Agafonov 2024-04-11 22:06:58 +04:00
parent 7fa4648316
commit 367defd995
7 changed files with 234 additions and 17 deletions
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48
Mage/src/main/java/mage/game/GameImpl.java
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@ -2068,12 +2068,16 @@ public abstract class GameImpl implements Game {
}
if (ability instanceof TriggeredManaAbility || ability instanceof DelayedTriggeredManaAbility) {
// 20110715 - 605.4
// 605.4a A triggered mana ability doesn’t go on the stack, so it can’t be targeted,
// countered, or otherwise responded to. Rather, it resolves immediately after the mana
// ability that triggered it, without waiting for priority.
Ability manaAbility = ability.copy();
if (manaAbility.getSourceObjectZoneChangeCounter() == 0) {
manaAbility.setSourceObjectZoneChangeCounter(getState().getZoneChangeCounter(ability.getSourceId()));
}
manaAbility.activate(this, false);
manaAbility.resolve(this);
if (manaAbility.activate(this, false)) {
manaAbility.resolve(this);
}
} else {
TriggeredAbility newAbility = ability.copy();
newAbility.newId();
@ -2084,6 +2088,46 @@ public abstract class GameImpl implements Game {
newAbility.setSourcePermanentTransformCount(this);
}
newAbility.setTriggerEvent(triggeringEvent);
// TODO: non-stack delayed triggers are xmage's workaround to support specific cards
// instead replacement effects usage. That triggers must be executed immediately like mana abilities
// or be reworked, cause current code do not support rule "nothing happens between the two events,
// including state-based actions"
//
// Search related cards by "usesStack = false".
// See conflicting tests in StateBaseTriggeredAbilityTest and BanisherPriestTest
//
// example 1:
// Grasp of Fate: exile ... until Grasp of Fate leaves the battlefield
// The exiled cards return to the battlefield immediately after Grasp of Fate leaves the battlefield. Nothing
// happens between the two events, including state-based actions.
// (2015-11-04)
//
// example 2:
// Banisher Priest: exile ... until Banisher Priest leaves the battlefield
// Banisher Priest's ability causes a zone change with a duration, a new style of ability that's
// somewhat reminiscent of older cards like Oblivion Ring. However, unlike Oblivion Ring, cards
// like Banisher Priest have a single ability that creates two one-shot effects: one that exiles
// the creature when the ability resolves, and another that returns the exiled card to the battlefield
// immediately after Banisher Priest leaves the battlefield.
// (2013-07-01)
// The exiled card returns to the battlefield immediately after Banisher Priest leaves the battlefield.
// Nothing happens between the two events, including state-based actions. The two creatures aren't on
// the battlefield at the same time. For example, if the returning creature is a Clone, it can't enter
// the battlefield as a copy of Banisher Priest.
// (2013-07-01)
//
//
/* possible code:
if (newAbility.isUsesStack()) {
state.addTriggeredAbility(newAbility);
} else {
if (newAbility.activate(this, false)) {
newAbility.resolve(this);
}
}//*/
// original code
state.addTriggeredAbility(newAbility);
}
}