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[NFC][Diagnostic] Try all permutations in longest match test (#163277)

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* Test reordering of rules.
* Test same length rules for emit and suppress.

Follow up to #162409, to confirm it does not affect this behavior.
This commit is contained in:
Vitaly Buka
2025-10-13 20:45:40 -07:00
committed by GitHub
parent 27d8441f82
commit b09dea1ee8
1 changed files with 29 additions and 16 deletions
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45
clang/unittests/Basic/DiagnosticTest.cpp
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@@ -21,6 +21,7 @@
#include "llvm/Support/VirtualFileSystem.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <algorithm>
#include <memory>
#include <optional>
#include <vector>
@@ -295,23 +296,35 @@ TEST_F(SuppressionMappingTest, EmitCategoryIsExcluded) {
}
TEST_F(SuppressionMappingTest, LongestMatchWins) {
llvm::StringLiteral SuppressionMappingFile = R"(
[unused]
src:*clang/*
src:*clang/lib/Sema/*=emit
src:*clang/lib/Sema/foo*)";
Diags.getDiagnosticOptions().DiagnosticSuppressionMappingsFile = "foo.txt";
FS->addFile("foo.txt", /*ModificationTime=*/{},
llvm::MemoryBuffer::getMemBuffer(SuppressionMappingFile));
clang::ProcessWarningOptions(Diags, Diags.getDiagnosticOptions(), *FS);
EXPECT_THAT(diags(), IsEmpty());
StringRef Lines[] = {
"[unused]",
"src:*clang/*",
"src:*clang/lib/Sema/*",
"src:*clang/lib/Sema/*=emit",
"src:*clang/lib/Sema/foo*",
};
llvm::MutableArrayRef<StringRef> Rules = Lines;
Rules = Rules.drop_front();
llvm::sort(Rules);
EXPECT_TRUE(Diags.isSuppressedViaMapping(
diag::warn_unused_function, locForFile("clang/lib/Basic/foo.h")));
EXPECT_FALSE(Diags.isSuppressedViaMapping(
diag::warn_unused_function, locForFile("clang/lib/Sema/bar.h")));
EXPECT_TRUE(Diags.isSuppressedViaMapping(diag::warn_unused_function,
locForFile("clang/lib/Sema/foo.h")));
do {
Diags.getDiagnosticOptions().DiagnosticSuppressionMappingsFile = "foo.txt";
std::string Contents = join(std::begin(Lines), std::end(Lines), "\n");
FS->addFile("foo.txt", /*ModificationTime=*/{},
llvm::MemoryBuffer::getMemBuffer(Contents));
clang::ProcessWarningOptions(Diags, Diags.getDiagnosticOptions(), *FS);
EXPECT_THAT(diags(), IsEmpty());
EXPECT_TRUE(Diags.isSuppressedViaMapping(
diag::warn_unused_function, locForFile("clang/lib/Basic/foo.h")))
<< Contents;
EXPECT_FALSE(Diags.isSuppressedViaMapping(
diag::warn_unused_function, locForFile("clang/lib/Sema/bar.h")))
<< Contents;
EXPECT_TRUE(Diags.isSuppressedViaMapping(
diag::warn_unused_function, locForFile("clang/lib/Sema/foo.h")))
<< Contents;
} while (std::next_permutation(Rules.begin(), Rules.end()));
}
TEST_F(SuppressionMappingTest, LongShortMatch) {