v0.2 Preview: Construction Plan.

backend/progression/test_services.py

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+import pytest
+
+from accounts.models import User
+from math_life.models import MathIdentity
+from progression.models import Card, UserAbility, UserCard, UserPet
+from progression.services import initialize_math_identity
+
+
+@pytest.mark.django_db
+def test_initialize_math_identity_重复调用保持精灵能力和人物卡唯一():
+    user = User.objects.create_user(
+        username="identity_user",
+        password="StrongPass_2026",
+        nickname="身份用户",
+    )
+    identity = MathIdentity.objects.create(
+        code="1000",
+        name="定理工匠",
+        clan="信仰者",
+        mathematician="高斯",
+        description="严谨推导与纯粹热爱。",
+        portrait="/static/img/mathematicians/1000.png",
+    )
+
+    initialize_math_identity(user, identity)
+    initialize_math_identity(user, identity)
+
+    assert UserPet.objects.filter(user=user).count() == 1
+    assert UserAbility.objects.filter(user=user).count() == len(UserAbility.Dimension.choices)
+    assert Card.objects.filter(slug="mathbti-1000").count() == 1
+    assert UserCard.objects.filter(user=user, card__slug="mathbti-1000").count() == 1
+    assert set(UserAbility.objects.filter(user=user).values_list("level", flat=True)) == {0}