Stardew valley: backpack fix, enum fix (#2028)

* - Reorganised tests for better backpack coverage
- Added a test for backpack locations being absent on vanilla

* - Fix backpack locations on vanilla

* - Fixed a typo in documentation

* - Added missing parenthesis after enum.auto so that Python 3.11 still works

* - Added Blank lines at the end of the backpack test files

* - cleaned whitespace

worlds/stardew_valley/test/TestBackpack.py

@@ -0,0 +1,44 @@
+from . import SVTestBase
+from .. import options
+
+
+class TestBackpackVanilla(SVTestBase):
+    options = {options.BackpackProgression.internal_name: options.BackpackProgression.option_vanilla}
+
+    def test_no_backpack_in_pool(self):
+        item_names = {item.name for item in self.multiworld.get_items()}
+        self.assertNotIn("Progressive Backpack", item_names)
+
+    def test_no_backpack_locations(self):
+        location_names = {location.name for location in self.multiworld.get_locations()}
+        self.assertNotIn("Large Pack", location_names)
+        self.assertNotIn("Deluxe Pack", location_names)
+
+
+class TestBackpackProgressive(SVTestBase):
+    options = {options.BackpackProgression.internal_name: options.BackpackProgression.option_progressive}
+
+    def test_backpack_is_in_pool_2_times(self):
+        item_names = [item.name for item in self.multiworld.get_items()]
+        self.assertEqual(item_names.count("Progressive Backpack"), 2)
+
+    def test_2_backpack_locations(self):
+        location_names = {location.name for location in self.multiworld.get_locations()}
+        self.assertIn("Large Pack", location_names)
+        self.assertIn("Deluxe Pack", location_names)
+
+
+class TestBackpackEarlyProgressive(SVTestBase):
+    options = {options.BackpackProgression.internal_name: options.BackpackProgression.option_early_progressive}
+
+    def test_backpack_is_in_pool_2_times(self):
+        item_names = [item.name for item in self.multiworld.get_items()]
+        self.assertEqual(item_names.count("Progressive Backpack"), 2)
+
+    def test_2_backpack_locations(self):
+        location_names = {location.name for location in self.multiworld.get_locations()}
+        self.assertIn("Large Pack", location_names)
+        self.assertIn("Deluxe Pack", location_names)
+
+    def test_progressive_backpack_is_in_early_pool(self):
+        self.assertIn("Progressive Backpack", self.multiworld.early_items[1])