[clang-tools-extra] [clang-doc] [test] Generalize error message patterns (PR #142373)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang-tools-extra

Author: Martin Storsjö (mstorsjo)

<details>
<summary>Changes</summary>

On Windows, we hit the "no such file or directory" case, not the "Not a directory" one.

MS STL produces the "no such file or directory" message for `std::error_code(ENOENT, std::generic_category()).message()`, while libc++ and libstdc++ produce a similar message with a capital N.

Adjust the error message regex to match for either of them.

That said, this kind of test is very brittle with respect to portability.

---
Full diff: https://github.com/llvm/llvm-project/pull/142373.diff


1 Files Affected:

- (modified) clang-tools-extra/test/clang-doc/invalid-options.cpp (+1-1) 


``````````diff
diff --git a/clang-tools-extra/test/clang-doc/invalid-options.cpp b/clang-tools-extra/test/clang-doc/invalid-options.cpp
index c8a4cef8364eb..59a0944718e31 100644
--- a/clang-tools-extra/test/clang-doc/invalid-options.cpp
+++ b/clang-tools-extra/test/clang-doc/invalid-options.cpp
@@ -2,7 +2,7 @@
 // RUN: rm -rf %t && touch %t
 // RUN: not clang-doc %s -output=%t/subdir 2>&1 | FileCheck %s --check-prefix=OUTPUT-FAIL
 // OUTPUT-FAIL: clang-doc error:
-// OUTPUT-FAIL: {{(Not a directory|no such file or directory)}}
+// OUTPUT-FAIL: {{(Not a directory|[Nn]o such file or directory)}}
 
 /// Invalid format option.
 // RUN: rm -rf %t && mkdir %t && touch %t/file

``````````

</details>


https://github.com/llvm/llvm-project/pull/142373