Rewrite #test_redefinition_mismatch to use a dedicated test class

This test is checking what happens if you try and define a class in a C
extension where that constant is already not a class. It was doing this
by overriding ::Date and then trying to require 'date. The issue with
this is that if we ever add 'date' as a dependency for the test runner,
this test will break because the test runner files get implicitly
required in an `assert_separately` block.

Better use an explicit class for this purpose which can't be accidentally
required elsewhere.

1 files changed, 1 insertions, 0 deletions

diff --git a/ext/-test-/class/init.c b/ext/-test-/class/init.c
index ed715c1942..108ff7525c 100644
--- a/ext/-test-/class/init.c
+++ b/ext/-test-/class/init.c
@@ -7,5 +7,6 @@ Init_class(void)
 {
     VALUE mBug = rb_define_module("Bug");
     VALUE mod = rb_define_module_under(mBug, "Class");
+    rb_define_class_under(mod, "TestClassDefinedInC", rb_cObject);
     TEST_INIT_FUNCS(init);
 }