fix: reset console pages in the index tests

A Sony fixture split by console recorded its pages in the shared map, and the index tests that ran after it linked PlayStation to the split page. They now start from an empty map, and the fixture clears it when done.

tests/test_site_r2_emulators.py

@@ -165,6 +165,9 @@ class TheSummaryLineIsProse(unittest.TestCase):
 
 class TheIndexNamesEmulatorsAndSystems(unittest.TestCase):
     def test_columns_and_counts(self):
+        # Pages another test split off would send the console elsewhere.
+        siterender.reset_console_pages()
+        self.addCleanup(siterender.reset_console_pages)
         saved = dict(siterender._system_page_map)
         self.addCleanup(siterender.set_system_page_map, saved)
         siterender.set_system_page_map({"sony-playstation": ("sony", "PlayStation")})

tests/test_site_r2_systems.py

@@ -128,7 +128,7 @@ class TheConsoleBiosComesFirst(unittest.TestCase):
         self.assertEqual(gs._start_with([_file("a.bin", "a")], _consumers({})), [])
 
     def test_the_page_carries_the_line_under_the_console(self):
-        # Sega keeps its consoles as sections; Sony gives each a page.
+        # Sega keeps its consoles as sections. Sony gives each a page.
         page = gs.generate_system_page("Sega", {"Saturn": self.files}, self.required_only())
         heading = page.index("## Saturn")
         self.assertLess(heading, page.index("**Start with**"))
@@ -254,6 +254,8 @@ class TheSystemsIndexListsConsoles(unittest.TestCase):
     be known to be under Sony."""
 
     def test_one_row_per_console_by_its_name(self):
+        gs.reset_console_pages()
+        self.addCleanup(gs.reset_console_pages)
         groups = {
             "Sony": {"PlayStation": [_file("a.bin", "a")], "PlayStation 2": [_file("b.bin", "b")]},
             "Other": {"ScummVM": [_file("c.bin", "c")]},

tests/test_site_r4_systems.py

@@ -288,12 +288,13 @@ class ConsolesFieldNamesMachinesOnce(unittest.TestCase):
         consumers = _consumers({})
         with gs.markup.using("mkdocs"):
             one = sum(len(line) + 1 for line in gs._system_file_card(big[0], consumers))
-        # Sega splits by size; every Sony console has a page whatever its size.
+        # Sega splits by size. Every Sony console has a page whatever its size.
         pages = gs.system_pages("Sega", {"Saturn": big, "Pico": small},
                                 consumers, budget=one * 12)
         self.assertIn("sega-saturn", pages)
         self.assertEqual(_consoles(pages["sega"][0]), ["Pico"])
         self.assertEqual(_consoles(pages["sega-saturn"][0]), ["Saturn"])
+        self.addCleanup(gs.reset_console_pages)
         sony = gs.system_pages("Sony", {"PlayStation": big, "PocketStation": small},
                                consumers, budget=one * 12)
         self.assertEqual(_consoles(sony["sony"][0]), [])