aae1d132c8
- allocate_capital _fill now takes sort_by; bucket3 uses dividend_yield, buckets 1/2 use combined_score - Previously bucket3 wrongly ranked by score (picked CPN/PTT); now picks highest-yield CRC — matches user rule 'bucket3 = highest dividend yield, ignoring score' - Added test_bucket3_ranks_by_yield_ignoring_score - Re-reviewed (deleg_43b165e0) passed=true, no logic/security errors; full suite 185 OK
92 lines
3.7 KiB
Python
92 lines
3.7 KiB
Python
"""Tests for the capital-allocation simulation engine."""
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from __future__ import annotations
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import unittest
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from app.simulation import Candidate, allocate_capital
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class AllocationTest(unittest.TestCase):
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def make_candidates(self):
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# dividend + high score
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return [
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Candidate("A", 10.0, 1.5, True, 5.0),
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Candidate("B", 20.0, 1.2, True, 3.0),
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Candidate("C", 5.0, 1.0, False, 0.0),
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Candidate("D", 2.0, 0.5, False, 0.0),
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Candidate("E", 50.0, 0.9, True, 8.0),
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]
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def test_allocates_three_buckets(self):
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res = allocate_capital(200_000, self.make_candidates())
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bucket_notional = res.bucket_notional
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self.assertIn(1, bucket_notional)
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self.assertIn(2, bucket_notional)
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self.assertIn(3, bucket_notional)
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# total invested + unallocated == capital
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self.assertAlmostEqual(res.invested + res.unallocated_cash, 200_000, places=2)
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# every order is a multiple of 100
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for o in res.orders:
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self.assertEqual(o.qty % 100, 0)
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self.assertGreaterEqual(o.qty, 100)
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def test_min_100_shares_respected(self):
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# tiny capital: bucket1 50% still must afford 100 shares
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res = allocate_capital(2_000, self.make_candidates())
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for o in res.orders:
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self.assertGreaterEqual(o.qty, 100)
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self.assertEqual(o.notional, o.qty * o.price)
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# never over-invest beyond capital
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self.assertLessEqual(res.invested, 2_000)
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def test_bucket3_excludes_already_bought(self):
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cands = [Candidate("A", 10.0, 1.5, True, 5.0),
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Candidate("B", 10.0, 0.1, True, 8.0)]
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res = allocate_capital(300_000, cands)
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# A (bought in bucket1) must NOT also appear in bucket3
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bucket3_syms = [o.symbol for o in res.orders if o.bucket == 3]
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bucket1_syms = [o.symbol for o in res.orders if o.bucket == 1]
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overlap = set(bucket3_syms) & set(bucket1_syms)
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self.assertEqual(overlap, set())
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def test_bucket3_ranks_by_yield_ignoring_score(self):
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# The spec: bucket3 = highest dividend yield, IGNORING score.
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# A low-score but high-yield name must rank above a high-score low-yield name.
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cands = [
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Candidate("HIGH_SCORE", 10.0, 8.0, True, 2.0), # score 8, yield 2%
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Candidate("HIGH_YIELD", 10.0, 0.1, True, 7.0), # score 0.1, yield 7%
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Candidate("MID", 10.0, 5.0, True, 3.0),
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]
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# Big capital so bucket1 consumes only the top score name, leaving
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# HIGH_YIELD (not HIGH_SCORE) to be the bucket3 top pick.
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res = allocate_capital(1_000_000, cands)
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b3 = [o.symbol for o in res.orders if o.bucket == 3]
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# HIGH_YIELD (7%) should be selected in bucket3 before HIGH_SCORE (2%)
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self.assertIn("HIGH_YIELD", b3)
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if "HIGH_SCORE" in b3:
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hi = b3.index("HIGH_SCORE")
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hy = b3.index("HIGH_YIELD")
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self.assertLess(hy, hi)
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def test_invalid_capital_raises(self):
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with self.assertRaises(Exception):
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allocate_capital(0, self.make_candidates())
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with self.assertRaises(Exception):
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allocate_capital(-100, self.make_candidates())
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def test_no_candidates_raises(self):
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with self.assertRaises(Exception):
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allocate_capital(100_000, [])
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def test_cash_fallback_when_nothing_fits(self):
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# only very high-priced names, tiny capital -> cannot buy 100 shares -> cash
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cands = [Candidate("X", 1000.0, 2.0, True, 3.0)]
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res = allocate_capital(50_000, cands) # 50% = 25k, can't buy 100*1000
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self.assertEqual(res.orders, [])
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self.assertAlmostEqual(res.unallocated_cash, 50_000, places=2)
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if __name__ == "__main__":
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unittest.main()
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