[lldb][test] Apply @expectedFailureAll/@skipIf early for debug_info tests (#73067)

The @expectedFailureAll and @skipIf decorators will mark the test case
as xfail/skip if _all_ conditions passed in match, including debug_info.
* If debug_info is not one of the matching conditions, we can
immediately evaluate the check and decide if it should be decorated.
* If debug_info *is* present as a match condition, we need to defer
whether or not to decorate until when the `LLDBTestCaseFactory`
metaclass expands the test case into its potential variants. This is
still early enough that the standard `unittest` framework will recognize
the test as xfail/skip by the time the test actually runs.

TestDecorators exhibits the edge cases more thoroughly. With the
exception of `@expectedFailureIf` (added by this commit), all those test
cases pass prior to this commit.

This is a followup to 212a60ec37322f853e91e171b305479b1abff2f2.

1 files changed, 22 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/lldbtest.py b/lldb/packages/Python/lldbsuite/test/lldbtest.py
index dc4e322..3abc713 100644
--- a/lldb/packages/Python/lldbsuite/test/lldbtest.py
+++ b/lldb/packages/Python/lldbsuite/test/lldbtest.py
@@ -1667,6 +1667,11 @@ class LLDBTestCaseFactory(type):
         if original_testcase.NO_DEBUG_INFO_TESTCASE:
             return original_testcase
 
+        # Default implementation for skip/xfail reason based on the debug category,
+        # where "None" means to run the test as usual.
+        def no_reason(_):
+            return None
+
         newattrs = {}
         for attrname, attrvalue in attrs.items():
             if attrname.startswith("test") and not getattr(
@@ -1688,6 +1693,12 @@ class LLDBTestCaseFactory(type):
                         if can_replicate
                     ]
 
+                xfail_for_debug_info_cat_fn = getattr(
+                    attrvalue, "__xfail_for_debug_info_cat_fn__", no_reason
+                )
+                skip_for_debug_info_cat_fn = getattr(
+                    attrvalue, "__skip_for_debug_info_cat_fn__", no_reason
+                )
                 for cat in categories:
 
                     @decorators.add_test_categories([cat])
@@ -1698,6 +1709,17 @@ class LLDBTestCaseFactory(type):
                     method_name = attrname + "_" + cat
                     test_method.__name__ = method_name
                     test_method.debug_info = cat
+
+                    xfail_reason = xfail_for_debug_info_cat_fn(cat)
+                    if xfail_reason:
+                        test_method = unittest2.expectedFailure(xfail_reason)(
+                            test_method
+                        )
+
+                    skip_reason = skip_for_debug_info_cat_fn(cat)
+                    if skip_reason:
+                        test_method = unittest2.skip(skip_reason)(test_method)
+
                     newattrs[method_name] = test_method
 
             else: