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//===-- CanonicalIncludesTests.cpp - --------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "index/CanonicalIncludes.h"
#include "clang/Basic/LangOptions.h"
#include "gtest/gtest.h"
namespace clang {
namespace clangd {
namespace {
TEST(CanonicalIncludesTest, CStandardLibrary) {
CanonicalIncludes CI;
auto Language = LangOptions();
Language.C11 = true;
CI.addSystemHeadersMapping(Language);
// Usual standard library symbols are mapped correctly.
EXPECT_EQ("<stdio.h>", CI.mapSymbol("printf"));
EXPECT_EQ("", CI.mapSymbol("unknown_symbol"));
}
TEST(CanonicalIncludesTest, CXXStandardLibrary) {
CanonicalIncludes CI;
auto Language = LangOptions();
Language.CPlusPlus = true;
CI.addSystemHeadersMapping(Language);
// Usual standard library symbols are mapped correctly.
EXPECT_EQ("<vector>", CI.mapSymbol("std::vector"));
EXPECT_EQ("<cstdio>", CI.mapSymbol("std::printf"));
// std::move is ambiguous, currently always mapped to <utility>
EXPECT_EQ("<utility>", CI.mapSymbol("std::move"));
// Unknown std symbols aren't mapped.
EXPECT_EQ("", CI.mapSymbol("std::notathing"));
// iosfwd declares some symbols it doesn't own.
EXPECT_EQ("<ostream>", CI.mapSymbol("std::ostream"));
// And (for now) we assume it owns the others.
EXPECT_EQ("<iosfwd>", CI.mapHeader("iosfwd"));
}
TEST(CanonicalIncludesTest, PathMapping) {
// As used for IWYU pragmas.
CanonicalIncludes CI;
CI.addMapping("foo/bar", "<baz>");
EXPECT_EQ("<baz>", CI.mapHeader("foo/bar"));
EXPECT_EQ("", CI.mapHeader("bar/bar"));
}
TEST(CanonicalIncludesTest, Precedence) {
CanonicalIncludes CI;
CI.addMapping("some/path", "<path>");
LangOptions Language;
Language.CPlusPlus = true;
CI.addSystemHeadersMapping(Language);
// We added a mapping from some/path to <path>.
ASSERT_EQ("<path>", CI.mapHeader("some/path"));
// We should have a path from 'bits/stl_vector.h' to '<vector>'.
ASSERT_EQ("<vector>", CI.mapHeader("bits/stl_vector.h"));
}
} // namespace
} // namespace clangd
} // namespace clang
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