feat(phase-10): add DeckBuilderAdapter unit tests

tests/deck_builder/test_adapter.py

@@ -0,0 +1,104 @@
+"""Tests for DeckBuilderAdapter — the bridge between Ollama pipeline and legacy API."""
+import pytest
+from unittest.mock import patch, MagicMock
+from types import SimpleNamespace
+
+from src.commander_ai_lab.deck_builder.adapter import DeckBuilderAdapter
+from src.commander_ai_lab.deck_builder.core.models import (
+    BuildResult,
+    CardEntry,
+    CommanderDeck,
+    DeckRatios,
+)
+
+
+def _fake_build_result():
+    """Return a minimal BuildResult for mocking build_deck."""
+    cmdr = CardEntry(name="Atraxa", color_identity=["W", "U", "B", "G"])
+    basics = ["Plains", "Island", "Swamp", "Mountain", "Forest"]
+    cards = [
+        CardEntry(name=basics[i % 5], quantity=1, category="lands", color_identity={"W", "U", "B", "G"})
+        for i in range(99)
+    ]
+    deck = CommanderDeck(commander=cmdr, cards=cards)
+    return BuildResult(
+        deck=deck,
+        warnings=["test warning"],
+        sources_consulted=["scryfall", "edhrec"],
+        build_time_seconds=1.23,
+    )
+
+
+class TestDeckBuilderAdapter:
+    def test_init_defaults(self):
+        adapter = DeckBuilderAdapter()
+        assert adapter.model == "gpt-oss:20b"
+        assert adapter.db_conn_factory is None
+
+    @patch("src.commander_ai_lab.deck_builder.adapter.build_deck")
+    def test_generate_deck_returns_expected_shape(self, mock_build):
+        mock_build.return_value = _fake_build_result()
+        adapter = DeckBuilderAdapter()
+        result = adapter.generate_deck("Atraxa", strategy="superfriends")
+
+        assert "commander" in result
+        assert result["commander"]["name"] == "Atraxa"
+        assert "cards" in result
+        assert "stats" in result
+        assert result["model"] == "gpt-oss:20b"
+        assert result["build_time_seconds"] == 1.23
+        assert "scryfall" in result["reasoning"]["sources"]
+
+    @patch("src.commander_ai_lab.deck_builder.adapter.build_deck")
+    def test_generate_deck_fills_to_100(self, mock_build):
+        mock_build.return_value = _fake_build_result()
+        adapter = DeckBuilderAdapter()
+        result = adapter.generate_deck("Atraxa")
+        total = sum(c.get("count", 1) for c in result["cards"])
+        assert total == 100  # 99 cards + commander fills to 100
+
+    @patch("src.commander_ai_lab.deck_builder.adapter.build_deck")
+    def test_ownership_without_db(self, mock_build):
+        mock_build.return_value = _fake_build_result()
+        adapter = DeckBuilderAdapter(db_conn_factory=None)
+        result = adapter.generate_deck("Atraxa")
+        for card in result["cards"]:
+            assert card["owned"] is False
+            assert card["from_collection"] is False
+
+
+class TestRunSubstitution:
+    def test_no_op_returns_namespace(self):
+        adapter = DeckBuilderAdapter()
+        cards = [
+            {"name": "Sol Ring", "owned": True},
+            {"name": "Mana Crypt", "owned": False},
+        ]
+        result = adapter.run_substitution(cards, commander="Atraxa")
+        assert isinstance(result, SimpleNamespace)
+        assert result.owned_count == 1
+        assert result.substituted_count == 0
+        assert result.missing_count == 1
+
+
+class TestHelpers:
+    def test_fill_basic_lands_adds_missing(self):
+        cards = [{"name": "Sol Ring", "count": 1, "category": "ramp"}]
+        filled = DeckBuilderAdapter._fill_basic_lands(cards, ["W", "U"], target_total=5)
+        total = sum(c.get("count", 1) for c in filled)
+        assert total == 5
+
+    def test_fill_basic_lands_no_excess(self):
+        cards = [{"name": f"Card{i}", "count": 1} for i in range(100)]
+        filled = DeckBuilderAdapter._fill_basic_lands(cards, ["W"], target_total=100)
+        assert len(filled) == 100
+
+    def test_compute_stats(self):
+        cards = [
+            {"name": "Sol Ring", "count": 1, "category": "ramp", "cmc": 1},
+            {"name": "Plains", "count": 36, "category": "lands", "cmc": 0},
+        ]
+        stats = DeckBuilderAdapter._compute_stats(cards)
+        assert stats["total_cards"] == 37
+        assert stats["land_count"] == 36
+        assert stats["average_cmc"] == 1.0