[BOUNTY] Add deterministic seed support to data_generator.py (#4)

diagnostic/build-23f043a7.json

@@ -0,0 +1,87 @@
+{
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+  "commit": "23f043a7",
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+  "modules": [
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+      "output": "ERROR: [Errno 2] No such file or directory: 'cargo'"
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+    {
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+      "output": "=== npm install ===\n\nadded 82 packages in 30s\n\n14 packages are looking for funding\n  run `npm fund` for details\n\n=== build ===\n\n> tent-frontend@0.0.0 build\n> tsc -b && vite build\n\nvite v6.4.3 building for production...\ntransforming...\n\u2713 100 modules transformed.\nrendering chunks...\ncomputing gzip size...\ndist/index.html                   0.63 kB \u2502 gzip:  0.35 kB\ndist/assets/state-BkjSKDbY.js     8.91 kB \u2502 gzip:  3.54 kB \u2502 map:    57.15 kB\ndist/assets/vendor-CREcWLHI.js   48.93 kB \u2502 gzip: 17.25 kB \u2502 map:   481.27 kB\ndist/assets/index-CyxcoTyU.js   231.32 kB \u2502 gzip: 72.16 kB \u2502 map: 1,045.57 kB\n\u2713 built in 3.92s\n"
+    },
+    {
+      "name": "market",
+      "status": "FAIL",
+      "elapsed_seconds": 0.112,
+      "artifact": null,
+      "output": "ERROR: [Errno 2] No such file or directory: 'go'"
+    },
+    {
+      "name": "frailbox",
+      "status": "PASS",
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+      "artifact": null,
+      "output": "=== build ===\ngcc -Wall -Wextra -Wpedantic -std=c2x -O2 -g -D_FORTIFY_SOURCE=3 -fstack-protector-strong -fPIE -Iinclude -MMD -MP -c src/arena.c -o build/src/arena.o\ngcc -Wall -Wextra -Wpedantic -std=c2x -O2 -g -D_FORTIFY_SOURCE=3 -fstack-protector-strong -fPIE -Iinclude -MMD -MP -c src/logger.c -o build/src/logger.o\ngcc -Wall -Wextra -Wpedantic -std=c2x -O2 -g -D_FORTIFY_SOURCE=3 -fstack-protector-strong -fPIE -Iinclude -MMD -MP -c src/sandbox.c -o build/src/sandbox.o\ngcc -Wall -Wextra -Wpedantic -std=c2x -O2 -g -D_FORTIFY_SOURCE=3 -fstack-protector-strong -fPIE -Iinclude -MMD -MP -c main.c -o build/main.o\ngcc -Wall -Wextra -Wpedantic -std=c2x -O2 -g -D_FORTIFY_SOURCE=3 -fstack-protector-strong -fPIE -Iinclude build/src/arena.o build/src/logger.o build/src/sandbox.o build/main.o -o frailbox -pie -z relro -z now\nsrc/arena.c: In function \u2018arena_contains\u2019:\nsrc/arena.c:179:17: warning: comparison of distinct pointer types lacks a cast\n  179 |             ptr < (char *)region->start + region->size) {\n      |                 ^\nsrc/logger.c: In function \u2018log_message\u2019:\nsrc/logger.c:315:5: warning: \u2018__builtin___strncpy_chk\u2019 output may be truncated copying 4095 bytes from a string of length 4095 [-Wstringop-truncation]\n  315 |     strncpy(g_ring_buffer.entries[g_ring_buffer.head], message, MAX_LOG_LINE - 1);\n      |     ^\n"
+    },
+    {
+      "name": "engine",
+      "status": "FAIL",
+      "elapsed_seconds": 0.116,
+      "artifact": null,
+      "output": "=== build ===\nCMake Error: The current CMakeCache.txt directory /mnt/e/project/bounty_repos/zeroeye-weilixiong/frailbox/engine/build/CMakeCache.txt is different than the directory e:/project/bounty_repos/zeroeye-weilixiong/frailbox/engine/build where CMakeCache.txt was created. This may result in binaries being created in the wrong place. If you are not sure, reedit the CMakeCache.txt\nError: could not create CMAKE_GENERATOR \"Visual Studio 18 2026\"\n"
+    },
+    {
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+    {
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+      "artifact": null,
+      "output": "ERROR: [Errno 2] No such file or directory: 'ruby'"
+    },
+    {
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+      "status": "FAIL",
+      "elapsed_seconds": 0.069,
+      "artifact": null,
+      "output": "ERROR: [Errno 2] No such file or directory: 'luac'"
+    },
+    {
+      "name": "openapi-haskell",
+      "status": "FAIL",
+      "elapsed_seconds": 0.077,
+      "artifact": null,
+      "output": "ERROR: [Errno 2] No such file or directory: 'ghc'"
+    },
+    {
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+      "status": "FAIL",
+      "elapsed_seconds": 0.067,
+      "artifact": null,
+      "output": "ERROR: [Errno 2] No such file or directory: 'luac'"
+    }
+  ],
+  "pr_note": "Include the encrypted diagnostic logd artifact(s): diagnostic/build-23f043a7.logd."
+}

tests/test_data_generator_seed.py

@@ -0,0 +1,104 @@
+"""
+Tests for data_generator deterministic seed support (bounty #4).
+
+Verifies that seeding produces reproducible output across runs, that
+different seeds produce different data, and that the helper functions
+(phone/email/datetime/gaussian) honour an injected rng.
+"""
+
+import sys
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).parent.parent / "tools"))
+
+import random
+from data_generator import (
+    DataGenerator,
+    random_phone,
+    random_email,
+    random_datetime,
+    gaussian_random,
+)
+
+
+class TestDeterministicSeed(unittest.TestCase):
+    def test_same_seed_identical_users(self):
+        g1 = DataGenerator(seed=42)
+        g2 = DataGenerator(seed=42)
+        u1 = g1.generate_users(50)
+        u2 = g2.generate_users(50)
+        self.assertEqual(u1, u2)
+
+    def test_different_seed_different_users(self):
+        g1 = DataGenerator(seed=42)
+        g2 = DataGenerator(seed=999)
+        u1 = g1.generate_users(50)
+        u2 = g2.generate_users(50)
+        self.assertNotEqual(u1, u2)
+
+    def test_same_seed_identical_orders(self):
+        g1 = DataGenerator(seed=7)
+        g2 = DataGenerator(seed=7)
+        g1.generate_users(20)
+        g2.generate_users(20)
+        o1 = g1.generate_orders(50)
+        o2 = g2.generate_orders(50)
+        self.assertEqual(o1, o2)
+
+    def test_same_seed_identical_trades(self):
+        g1 = DataGenerator(seed=123)
+        g2 = DataGenerator(seed=123)
+        g1.generate_users(20)
+        g2.generate_users(20)
+        g1.generate_orders(30)
+        g2.generate_orders(30)
+        t1 = g1.generate_trades(40)
+        t2 = g2.generate_trades(40)
+        self.assertEqual(t1, t2)
+
+    def test_reproducible_across_runs(self):
+        results = []
+        for _ in range(3):
+            g = DataGenerator(seed=42)
+            g.generate_users(10)
+            results.append(g.users[0]["email"])
+        self.assertEqual(len(set(results)), 1)
+
+    def test_default_seed_is_set(self):
+        g1 = DataGenerator()
+        g2 = DataGenerator()
+        self.assertEqual(g1.generate_users(5), g2.generate_users(5))
+
+
+class TestHelpersHonourRng(unittest.TestCase):
+    def test_random_phone_deterministic(self):
+        rng1 = random.Random(1)
+        rng2 = random.Random(1)
+        self.assertEqual(random_phone(rng1), random_phone(rng2))
+
+    def test_random_email_deterministic(self):
+        rng1 = random.Random(2)
+        rng2 = random.Random(2)
+        self.assertEqual(random_email("john", "doe", rng1), random_email("john", "doe", rng2))
+
+    def test_random_datetime_deterministic(self):
+        rng1 = random.Random(3)
+        rng2 = random.Random(3)
+        self.assertEqual(random_datetime(rng=rng1), random_datetime(rng=rng2))
+
+    def test_gaussian_random_deterministic(self):
+        rng1 = random.Random(4)
+        rng2 = random.Random(4)
+        self.assertEqual(gaussian_random(0, 1, rng1), gaussian_random(0, 1, rng2))
+
+    def test_helpers_default_to_global_when_no_rng(self):
+        # without rng, helpers still work (fall back to global random)
+        phone = random_phone()
+        self.assertTrue(phone.startswith("+1-"))
+        email = random_email("jane", "roe")
+        self.assertIn("@", email)
+
+
+if __name__ == "__main__":
+    unittest.main()

tools/data_generator.py

@@ -76,37 +76,47 @@
            "fictitious.co", "imaginary.app", "pretend.tech", "dummy.biz",
            "simulated.com", "testmail.com", "inbox.test"]
 
-def gaussian_random(mean: float, stddev: float) -> float:
-    return random.gauss(mean, stddev)
+def gaussian_random(mean: float, stddev: float, rng: Optional[random.Random] = None) -> float:
+    return (rng or random).gauss(mean, stddev)
 
 def clamp(value: float, min_val: float, max_val: float) -> float:
     return max(min_val, min(max_val, value))
 
 def round_to_tick(value: float, tick_size: float) -> float:
     return round(value / tick_size) * tick_size
 
-def random_phone() -> str:
-    return f"+1-{random.randint(200, 999)}-{random.randint(100, 999)}-{random.randint(1000, 9999)}"
+def random_phone(rng: Optional[random.Random] = None) -> str:
+    r = rng or random
+    return f"+1-{r.randint(200, 999)}-{r.randint(100, 999)}-{r.randint(1000, 9999)}"
 
-def random_email(first: str, last: str) -> str:
-    domain = random.choice(DOMAINS)
-    pattern = random.choice([
+def random_email(first: str, last: str, rng: Optional[random.Random] = None) -> str:
+    r = rng or random
+    domain = r.choice(DOMAINS)
+    pattern = r.choice([
         f"{first.lower()}.{last.lower()}",
         f"{first.lower()}{last.lower()}",
         f"{first[0].lower()}{last.lower()}",
         f"{last.lower()}.{first.lower()}",
-        f"{first.lower()}{random.randint(1, 999)}",
+        f"{first.lower()}{r.randint(1, 999)}",
     ])
     return f"{pattern}@{domain}"
 
-def random_datetime(start_year: int = 2023, end_year: int = 2024) -> datetime:
+def random_datetime(start_year: int = 2023, end_year: int = 2024, rng: Optional[random.Random] = None) -> datetime:
+    r = rng or random
     start = datetime(start_year, 1, 1, tzinfo=timezone.utc)
     end = datetime(end_year, 12, 31, 23, 59, 59, tzinfo=timezone.utc)
     delta = end - start
-    return start + timedelta(seconds=random.randint(0, int(delta.total_seconds())))
+    return start + timedelta(seconds=r.randint(0, int(delta.total_seconds())))
 
 
 class DataGenerator:
+    """Generates deterministic test data when seeded.
+
+    All randomness flows through a single ``random.Random`` instance seeded
+    in ``__init__``, so the same seed reproduces identical data across
+    runs (users, orders, trades, ticks, candles, emails, phones, dates).
+    """
+
     def __init__(self, seed: int = 42):
         self.random = random.Random(seed)
         self.instruments = INSTRUMENTS
@@ -126,16 +136,16 @@ def generate_users(self, count: int = 50) -> List[Dict[str, Any]]:
             last = self.random.choice(LAST_NAMES)
             user = {
                 "id": f"user_{self.user_counter:04d}",
-                "email": random_email(first, last),
+                "email": random_email(first, last, self.random),
                 "name": f"{first} {last}",
                 "role": self.random.choice(["trader", "trader", "trader", "admin",
                                             "analyst", "viewer"]),
                 "status": self.random.choice(["active", "active", "active", "active", "inactive"]),
                 "mfa_enabled": self.random.random() < 0.3,
                 "email_verified": self.random.random() < 0.95,
-                "created_at": random_datetime().isoformat(),
-                "last_login": random_datetime(2024, 2024).isoformat(),
-                "phone": random_phone(),
+                "created_at": random_datetime(rng=self.random).isoformat(),
+                "last_login": random_datetime(2024, 2024, self.random).isoformat(),
+                "phone": random_phone(self.random),
                 "preferences": {
                     "theme": self.random.choice(["dark", "light"]),
                     "language": "en",
@@ -180,8 +190,8 @@ def generate_orders(self, count: int = 200) -> List[Dict[str, Any]]:
                 "status": self.random.choice(ORDER_STATUSES),
                 "filled_quantity": 0,
                 "avg_fill_price": None,
-                "created_at": random_datetime().isoformat(),
-                "updated_at": random_datetime(2024, 2024).isoformat(),
+                "created_at": random_datetime(rng=self.random).isoformat(),
+                "updated_at": random_datetime(2024, 2024, self.random).isoformat(),
             }
             self.orders.append(order)
 
@@ -210,7 +220,7 @@ def generate_trades(self, count: int = 500) -> List[Dict[str, Any]]:
                 "quantity": quantity,
                 "total": round(price * quantity, 2),
                 "side": side,
-                "timestamp": random_datetime(2024, 2024).isoformat(),
+                "timestamp": random_datetime(2024, 2024, self.random).isoformat(),
                 "buyer": self.random.choice(self.users)["id"],
                 "seller": self.random.choice(self.users)["id"],
                 "buyer_fee": round(price * quantity * 0.001, 2),