1 files changed, 25 insertions, 0 deletions
diff --git a/llvm/unittests/ProfileData/CoverageMappingTest.cpp b/llvm/unittests/ProfileData/CoverageMappingTest.cpp
index 82e7574..4854b7f 100644
--- a/llvm/unittests/ProfileData/CoverageMappingTest.cpp
+++ b/llvm/unittests/ProfileData/CoverageMappingTest.cpp
@@ -895,4 +895,29 @@ INSTANTIATE_TEST_CASE_P(ParameterizedCovMapTest, CoverageMappingTest,
                                           std::pair<bool, bool>({true, false}),
                                           std::pair<bool, bool>({true, true})),);
 
+TEST(CoverageMappingTest, filename_roundtrip) {
+  std::vector<StringRef> Paths({"a", "b", "c", "d", "e"});
+
+  for (bool Compress : {false, true}) {
+    std::string EncodedFilenames;
+    {
+      raw_string_ostream OS(EncodedFilenames);
+      CoverageFilenamesSectionWriter Writer(Paths);
+      Writer.write(OS, Compress);
+    }
+
+    std::vector<StringRef> ReadFilenames;
+    RawCoverageFilenamesReader Reader(EncodedFilenames, ReadFilenames);
+    BinaryCoverageReader::DecompressedData Decompressed;
+    EXPECT_THAT_ERROR(Reader.read(CovMapVersion::CurrentVersion, Decompressed),
+                      Succeeded());
+    if (!Compress)
+      ASSERT_EQ(Decompressed.size(), 0U);
+
+    ASSERT_EQ(ReadFilenames.size(), Paths.size());
+    for (unsigned I = 0; I < Paths.size(); ++I)
+      ASSERT_TRUE(ReadFilenames[I] == Paths[I]);
+  }
+}
+
 } // end anonymous namespace