[clang] aa0d717 - [clang] NFC: test for undefined behaviour in RawComment::getFormattedText()

[Dmitry Polukhin via cfe-commits]

Author: Dmitry Polukhin
Date: 2021-06-07T03:05:00-07:00
New Revision: aa0d7179bbb3fd24bc9eb1fd6203565dbd50e8d8

URL: https://github.com/llvm/llvm-project/commit/aa0d7179bbb3fd24bc9eb1fd6203565dbd50e8d8
DIFF: https://github.com/llvm/llvm-project/commit/aa0d7179bbb3fd24bc9eb1fd6203565dbd50e8d8.diff

LOG: [clang] NFC: test for undefined behaviour in RawComment::getFormattedText()

This diff adds testcase for the issue fixed in https://reviews.llvm.org/D77468
but regression test was not added in the diff. On Clang 9 it caused
crash in cland during code completion.

Test Plan: check-clang-unit

Differential Revision: https://reviews.llvm.org/D103722

Added: 
    

Modified: 
    clang/unittests/AST/CommentTextTest.cpp

Removed: 
    


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diff  --git a/clang/unittests/AST/CommentTextTest.cpp b/clang/unittests/AST/CommentTextTest.cpp
index 3de6758e45b6e..b697828698d85 100644
--- a/clang/unittests/AST/CommentTextTest.cpp
+++ b/clang/unittests/AST/CommentTextTest.cpp
@@ -124,4 +124,11 @@ R"cpp(
   // clang-format on
 }
 
+TEST_F(CommentTextTest, EmptyFormattedText) {
+  // Test that empty formatted text doesn't cause crash.
+  const char *ExpectedOutput = "";
+  auto Formatted = formatComment("//!<");
+  EXPECT_EQ(ExpectedOutput, Formatted);
+}
+
 } // namespace clang