1 files changed, 96 insertions, 0 deletions
diff --git a/unittests/Lex/HeaderSearchTest.cpp b/unittests/Lex/HeaderSearchTest.cpp
new file mode 100644
index 0000000000000..c2794f5e95939
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+++ b/unittests/Lex/HeaderSearchTest.cpp
@@ -0,0 +1,96 @@
+//===- unittests/Lex/HeaderSearchTest.cpp ------ HeaderSearch tests -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/MemoryBufferCache.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/TargetOptions.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/HeaderSearchOptions.h"
+#include "gtest/gtest.h"
+
+namespace clang {
+namespace {
+
+// The test fixture.
+class HeaderSearchTest : public ::testing::Test {
+protected:
+  HeaderSearchTest()
+      : VFS(new vfs::InMemoryFileSystem), FileMgr(FileMgrOpts, VFS),
+        DiagID(new DiagnosticIDs()),
+        Diags(DiagID, new DiagnosticOptions, new IgnoringDiagConsumer()),
+        SourceMgr(Diags, FileMgr), TargetOpts(new TargetOptions),
+        Search(std::make_shared<HeaderSearchOptions>(), SourceMgr, Diags,
+               LangOpts, Target.get()) {
+    TargetOpts->Triple = "x86_64-apple-darwin11.1.0";
+    Target = TargetInfo::CreateTargetInfo(Diags, TargetOpts);
+  }
+
+  void addSearchDir(llvm::StringRef Dir) {
+    VFS->addFile(Dir, 0, llvm::MemoryBuffer::getMemBuffer(""), /*User=*/None,
+                 /*Group=*/None, llvm::sys::fs::file_type::directory_file);
+    const DirectoryEntry *DE = FileMgr.getDirectory(Dir);
+    assert(DE);
+    auto DL = DirectoryLookup(DE, SrcMgr::C_User, /*isFramework=*/false);
+    Search.AddSearchPath(DL, /*isAngled=*/false);
+  }
+
+  IntrusiveRefCntPtr<vfs::InMemoryFileSystem> VFS;
+  FileSystemOptions FileMgrOpts;
+  FileManager FileMgr;
+  IntrusiveRefCntPtr<DiagnosticIDs> DiagID;
+  DiagnosticsEngine Diags;
+  SourceManager SourceMgr;
+  LangOptions LangOpts;
+  std::shared_ptr<TargetOptions> TargetOpts;
+  IntrusiveRefCntPtr<TargetInfo> Target;
+  HeaderSearch Search;
+};
+
+TEST_F(HeaderSearchTest, NoSearchDir) {
+  EXPECT_EQ(Search.search_dir_size(), 0u);
+  EXPECT_EQ(Search.suggestPathToFileForDiagnostics("/x/y/z", /*WorkingDir=*/""),
+            "/x/y/z");
+}
+
+TEST_F(HeaderSearchTest, SimpleShorten) {
+  addSearchDir("/x");
+  addSearchDir("/x/y");
+  EXPECT_EQ(Search.suggestPathToFileForDiagnostics("/x/y/z", /*WorkingDir=*/""),
+            "z");
+  addSearchDir("/a/b/");
+  EXPECT_EQ(Search.suggestPathToFileForDiagnostics("/a/b/c", /*WorkingDir=*/""),
+            "c");
+}
+
+TEST_F(HeaderSearchTest, ShortenWithWorkingDir) {
+  addSearchDir("x/y");
+  EXPECT_EQ(Search.suggestPathToFileForDiagnostics("/a/b/c/x/y/z",
+                                                   /*WorkingDir=*/"/a/b/c"),
+            "z");
+}
+
+TEST_F(HeaderSearchTest, Dots) {
+  addSearchDir("/x/./y/");
+  EXPECT_EQ(Search.suggestPathToFileForDiagnostics("/x/y/./z",
+                                                   /*WorkingDir=*/""),
+            "z");
+  addSearchDir("a/.././c/");
+  EXPECT_EQ(Search.suggestPathToFileForDiagnostics("/m/n/./c/z",
+                                                   /*WorkingDir=*/"/m/n/"),
+            "z");
+}
+
+} // namespace
+} // namespace clang