feat(saju-lab): calculator/constants.py — 천간/지지/오행/지장간 상수

saju-lab/tests/test_constants.py

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+from app.calculator import constants
+
+
+def test_heavenly_stems_10():
+    assert len(constants.HEAVENLY_STEMS) == 10
+    assert constants.HEAVENLY_STEMS[0] == "甲"
+    assert constants.HEAVENLY_STEMS[9] == "癸"
+
+
+def test_earthly_branches_12():
+    assert len(constants.EARTHLY_BRANCHES) == 12
+    assert constants.EARTHLY_BRANCHES[0] == "子"
+    assert constants.EARTHLY_BRANCHES[11] == "亥"
+
+
+def test_five_elements_mapping():
+    assert constants.FIVE_ELEMENTS["甲"] == "木"
+    assert constants.FIVE_ELEMENTS["丁"] == "火"
+    assert constants.FIVE_ELEMENTS["亥"] == "水"
+    assert constants.FIVE_ELEMENTS["申"] == "金"
+    assert constants.FIVE_ELEMENTS["未"] == "土"
+
+
+def test_hidden_stems():
+    assert constants.HIDDEN_STEMS["子"] == ["癸"]
+    assert constants.HIDDEN_STEMS["丑"] == ["己", "癸", "辛"]
+    assert constants.HIDDEN_STEMS["寅"] == ["甲", "丙", "戊"]
+
+
+def test_yang_yin_stems():
+    assert constants.IS_YANG_STEM["甲"] is True
+    assert constants.IS_YANG_STEM["乙"] is False
+    assert constants.IS_YANG_STEM["庚"] is True
+    assert constants.IS_YANG_STEM["辛"] is False