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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.mapHeader("path/stdio.h", "printf"));
}
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.mapHeader("path/vector.h", "std::vector"));
EXPECT_EQ("<cstdio>", CI.mapHeader("path/stdio.h", "std::printf"));
// std::move is ambiguous, currently mapped only based on path
EXPECT_EQ("<utility>", CI.mapHeader("libstdc++/bits/move.h", "std::move"));
EXPECT_EQ("path/utility.h", CI.mapHeader("path/utility.h", "std::move"));
// Unknown std symbols aren't mapped.
EXPECT_EQ("foo/bar.h", CI.mapHeader("foo/bar.h", "std::notathing"));
// iosfwd declares some symbols it doesn't own.
EXPECT_EQ("<ostream>", CI.mapHeader("iosfwd", "std::ostream"));
// And (for now) we assume it owns the others.
EXPECT_EQ("<iosfwd>", CI.mapHeader("iosfwd", "std::notwathing"));
}
TEST(CanonicalIncludesTest, PathMapping) {
// As used for IWYU pragmas.
CanonicalIncludes CI;
CI.addMapping("foo/bar", "<baz>");
EXPECT_EQ("<baz>", CI.mapHeader("foo/bar", "some::symbol"));
EXPECT_EQ("bar/bar", CI.mapHeader("bar/bar", "some::symbol"));
}
TEST(CanonicalIncludesTest, SymbolMapping) {
// As used for standard library.
CanonicalIncludes CI;
LangOptions Language;
Language.CPlusPlus = true;
// Ensures 'std::vector' is mapped to '<vector>'.
CI.addSystemHeadersMapping(Language);
EXPECT_EQ("<vector>", CI.mapHeader("foo/bar", "std::vector"));
EXPECT_EQ("foo/bar", CI.mapHeader("foo/bar", "other::symbol"));
}
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", ""));
// We should also have a symbol mapping from 'std::map' to '<map>'.
ASSERT_EQ("<map>", CI.mapHeader("some/header.h", "std::map"));
// And the symbol mapping should take precedence over paths mapping.
EXPECT_EQ("<map>", CI.mapHeader("bits/stl_vector.h", "std::map"));
EXPECT_EQ("<map>", CI.mapHeader("some/path", "std::map"));
}
} // namespace
} // namespace clangd
} // namespace clang
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