test: add GUT test files for core modules (Card, Deck, HandEvaluator, RuleEngine, GameState)

tests/test_game_state.gd

@@ -0,0 +1,74 @@
+extends GutTest
+
+var _config: RuleConfig
+const _C = preload("res://src/core/constants.gd")
+
+func before_each():
+    _config = RuleConfig.standard()
+
+func _card(orig_id: int, deck_idx: int = 0) -> Card:
+    var suit: int
+    var rank: int
+    if orig_id == 52:
+        suit = 4; rank = 15
+    elif orig_id == 53:
+        suit = 5; rank = 16
+    else:
+        suit = orig_id % 4
+        rank = 2 + (orig_id / 4)
+    var c := Card.create(orig_id, suit, rank)
+    c.card_id = Card.card_id_from_deck(orig_id, deck_idx)
+    return c
+
+func _cards(ids: Array) -> Array[Card]:
+    var result: Array[Card] = []
+    for id in ids:
+        result.append(_card(id as int))
+    return result
+
+func test_generate_includes_pass():
+    var hand := _cards([0])
+    var moves := MoveGenerator.generate(hand, 5, _config)
+    var has_pass := false
+    for m in moves:
+        if m.type == -1 and m.cards.is_empty():
+            has_pass = true
+    assert_true(has_pass)
+
+func test_generate_singles():
+    var hand := _cards([0, 4, 8])
+    var moves := MoveGenerator.generate(hand, 5, _config)
+    var singles := 0
+    for m in moves:
+        if m.type == _C.TYPE_SINGLE:
+            singles += 1
+    assert_gt(singles, 0)
+
+func test_generate_pair():
+    var hand: Array[Card] = [_card(0, 0), _card(0, 1), _card(4, 0)]
+    var moves := MoveGenerator.generate(hand, 5, _config)
+    var has_pair := false
+    for m in moves:
+        if m.type == _C.TYPE_PAIR:
+            has_pair = true
+    assert_true(has_pair)
+
+func test_empty_hand_returns_pass_only():
+    var hand: Array[Card] = []
+    var moves := MoveGenerator.generate(hand, 5, _config)
+    assert_eq(moves.size(), 1)
+    assert_eq(moves[0].type, -1)
+
+func test_rule_config_standard():
+    var rc := RuleConfig.standard()
+    assert_eq(rc.double_down_levels, 3)
+    assert_false(rc.can_tribute_wild)
+
+func test_rule_config_huaian():
+    var rc := RuleConfig.huaian()
+    assert_false(rc.same_suit_straight_beats_bomb)
+
+func test_rule_config_hash():
+    var rc := RuleConfig.standard()
+    var h := rc.to_hash_data()
+    assert_eq(h.double_down, 3)