tests: revisit tests for removed load_module

The tests came via c629f6b18 and c61ff31ffa.
The fixes from there are kind of obsoleted by 4cd08f9 (moving to importlib),
but it makes sense to keep them as integration tests in general.

testing/test_assertrewrite.py

@@ -1028,74 +1028,36 @@ class TestAssertionRewriteHookDetails:
 
         assert _read_pyc(str(source), str(pyc)) is None  # no error
 
-    def test_reload_is_same(self, testdir):
+    def test_reload_is_same_and_reloads(self, testdir: Testdir) -> None:
-        # A file that will be picked up during collecting.
+        """Reloading a (collected) module after change picks up the change."""
-        testdir.tmpdir.join("file.py").ensure()
+        testdir.makeini(
-        testdir.tmpdir.join("pytest.ini").write(
-            textwrap.dedent(
             """
             [pytest]
             python_files = *.py
             """
         )
-        )
-
         testdir.makepyfile(
-            test_fun="""
+            file="""
-            import sys
-            try:
-                from imp import reload
-            except ImportError:
-                pass
-
-            def test_loader():
-                import file
-                assert sys.modules["file"] is reload(file)
-            """
-        )
-        result = testdir.runpytest("-s")
-        result.stdout.fnmatch_lines(["* 1 passed*"])
-
-    def test_reload_reloads(self, testdir):
-        """Reloading a module after change picks up the change."""
-        testdir.tmpdir.join("file.py").write(
-            textwrap.dedent(
-                """
             def reloaded():
                 return False
 
             def rewrite_self():
                 with open(__file__, 'w') as self:
                     self.write('def reloaded(): return True')
-        """
+            """,
-            )
-        )
-        testdir.tmpdir.join("pytest.ini").write(
-            textwrap.dedent(
-                """
-            [pytest]
-            python_files = *.py
-        """
-            )
-        )
-
-        testdir.makepyfile(
             test_fun="""
             import sys
-            try:
+            from importlib import reload
-                from imp import reload
-            except ImportError:
-                pass
 
             def test_loader():
                 import file
                 assert not file.reloaded()
                 file.rewrite_self()
-                reload(file)
+                assert sys.modules["file"] is reload(file)
                 assert file.reloaded()
-            """
+            """,
         )
-        result = testdir.runpytest("-s")
+        result = testdir.runpytest()
         result.stdout.fnmatch_lines(["* 1 passed*"])
 
     def test_get_data_support(self, testdir):