feat: add scouting sample seed data baseline

app/scouting/tests.py

@@ -1,6 +1,7 @@
 from datetime import date
 from decimal import Decimal
 
+from django.core.management import call_command
 from django.test import TestCase
 from django.urls import reverse
 
@@ -236,3 +237,38 @@ class ScoutingSearchViewsTests(TestCase):
         )
         self.assertContains(response, self.player_pg.full_name)
         self.assertNotContains(response, self.player_wing.full_name)
+
+
+class SeedScoutingDataCommandTests(TestCase):
+    def test_seed_command_creates_expected_core_objects(self):
+        call_command("seed_scouting_data")
+
+        self.assertGreaterEqual(Competition.objects.count(), 3)
+        self.assertGreaterEqual(Team.objects.count(), 4)
+        self.assertGreaterEqual(Season.objects.count(), 3)
+        self.assertGreaterEqual(Player.objects.count(), 5)
+        self.assertGreaterEqual(PlayerSeason.objects.count(), 6)
+        self.assertEqual(PlayerSeason.objects.count(), PlayerSeasonStats.objects.count())
+
+        player = Player.objects.get(full_name="Marco Guard")
+        self.assertEqual(player.position, Player.Position.PG)
+        self.assertTrue(player.roles.filter(slug="playmaker").exists())
+        self.assertTrue(player.specialties.filter(slug="ball-handling").exists())
+
+    def test_seed_command_is_idempotent_for_repeat_runs(self):
+        call_command("seed_scouting_data")
+        first_counts = {
+            "players": Player.objects.count(),
+            "contexts": PlayerSeason.objects.count(),
+            "stats": PlayerSeasonStats.objects.count(),
+            "roles": Role.objects.count(),
+            "specialties": Specialty.objects.count(),
+        }
+
+        call_command("seed_scouting_data")
+
+        self.assertEqual(Player.objects.count(), first_counts["players"])
+        self.assertEqual(PlayerSeason.objects.count(), first_counts["contexts"])
+        self.assertEqual(PlayerSeasonStats.objects.count(), first_counts["stats"])
+        self.assertEqual(Role.objects.count(), first_counts["roles"])
+        self.assertEqual(Specialty.objects.count(), first_counts["specialties"])