[llvm] [LIT][NFC] Fix double slash in GoogleTest format test names (PR #210296)

[via llvm-commits]

https://github.com/kekaczma created https://github.com/llvm/llvm-project/pull/210296

When test_sub_dirs is empty, split creates [''] causing double slashes in test names like 'Suite :: device//device-test/Name'.

Fix: Filter empty strings and use ['.'] as default, skip '.' in path construction to produce 'Suite :: device/device-test/Name'.

This change improves test name consistency, which is needed for automated CI test result collection and analysis.

>From d4207be33e7d934119b94d1b1cb542796a88e520 Mon Sep 17 00:00:00 2001
From: Katarzyna Kaczmarska <katarzynax.e.kaczmarska at intel.com>
Date: Fri, 17 Jul 2026 12:40:28 +0200
Subject: [PATCH] [LIT][NFC] Fix double slash in GoogleTest format test names

When test_sub_dirs is empty, split creates [''] causing double
slashes in test names like 'Suite :: device//device-test/Name'.

Fix: Filter empty strings and use ['.'] as default, skip '.'
in path construction to produce 'Suite :: device/device-test/Name'.

This change improves test name consistency, which is needed for
automated CI test result collection and analysis.
---
 llvm/utils/lit/lit/formats/googletest.py | 26 ++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/llvm/utils/lit/lit/formats/googletest.py b/llvm/utils/lit/lit/formats/googletest.py
index e567cce541beb..121e89531e226 100644
--- a/llvm/utils/lit/lit/formats/googletest.py
+++ b/llvm/utils/lit/lit/formats/googletest.py
@@ -16,7 +16,7 @@
 class GoogleTest(TestFormat):
     def __init__(self, test_sub_dirs, test_suffix, run_under=[], test_prefix=None):
         self.seen_executables = set()
-        self.test_sub_dirs = str(test_sub_dirs).split(";")
+        self.test_sub_dirs = [d for d in str(test_sub_dirs).split(";") if d] or ["."]
 
         # On Windows, assume tests will also end in '.exe'.
         exe_suffix = str(test_suffix)
@@ -80,12 +80,19 @@ def getTestsInDirectory(self, testSuite, path_in_suite, litConfig, localConfig):
 
                         # Create one lit test for each shard.
                         for idx in range(nshard):
-                            testPath = path_in_suite + (
-                                subdir,
-                                fn,
-                                str(idx),
-                                str(nshard),
-                            )
+                            if subdir == ".":
+                                testPath = path_in_suite + (
+                                    fn,
+                                    str(idx),
+                                    str(nshard),
+                                )
+                            else:
+                                testPath = path_in_suite + (
+                                    subdir,
+                                    fn,
+                                    str(idx),
+                                    str(nshard),
+                                )
                             json_file = (
                                 "-".join(
                                     [
@@ -106,7 +113,10 @@ def getTestsInDirectory(self, testSuite, path_in_suite, litConfig, localConfig):
                                 gtest_json_file=json_file,
                             )
                     else:
-                        testPath = path_in_suite + (subdir, fn)
+                        if subdir == ".":
+                            testPath = path_in_suite + (fn,)
+                        else:
+                            testPath = path_in_suite + (subdir, fn)
                         json_file = (
                             "-".join(
                                 [