1 files changed, 112 insertions, 0 deletions
diff --git a/unittests/Rename/ClangRenameTest.h b/unittests/Rename/ClangRenameTest.h
new file mode 100644
index 0000000000000..0933dd5aaf4f2
--- /dev/null
+++ b/unittests/Rename/ClangRenameTest.h
@@ -0,0 +1,112 @@
+//===-- ClangRenameTests.cpp - clang-rename unit tests --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "unittests/Tooling/RewriterTestContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/FileSystemOptions.h"
+#include "clang/Basic/VirtualFileSystem.h"
+#include "clang/Format/Format.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/PCHContainerOperations.h"
+#include "clang/Tooling/Refactoring.h"
+#include "clang/Tooling/Refactoring/Rename/RenamingAction.h"
+#include "clang/Tooling/Refactoring/Rename/USRFindingAction.h"
+#include "clang/Tooling/Tooling.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "gtest/gtest.h"
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace clang {
+namespace clang_rename {
+namespace test {
+
+struct Case {
+  std::string Before;
+  std::string After;
+  std::string OldName;
+  std::string NewName;
+};
+
+class ClangRenameTest : public testing::Test,
+                        public testing::WithParamInterface<Case> {
+protected:
+  void AppendToHeader(StringRef Code) { HeaderContent += Code.str(); }
+
+  std::string runClangRenameOnCode(llvm::StringRef Code,
+                                   llvm::StringRef OldName,
+                                   llvm::StringRef NewName) {
+    std::string NewCode;
+    llvm::raw_string_ostream(NewCode) << llvm::format(
+        "#include \"%s\"\n%s", HeaderName.c_str(), Code.str().c_str());
+    tooling::FileContentMappings FileContents = {{HeaderName, HeaderContent},
+                                                 {CCName, NewCode}};
+    clang::RewriterTestContext Context;
+    Context.createInMemoryFile(HeaderName, HeaderContent);
+    clang::FileID InputFileID = Context.createInMemoryFile(CCName, NewCode);
+
+    tooling::USRFindingAction FindingAction({}, {OldName}, false);
+    std::unique_ptr<tooling::FrontendActionFactory> USRFindingActionFactory =
+        tooling::newFrontendActionFactory(&FindingAction);
+
+    if (!tooling::runToolOnCodeWithArgs(
+            USRFindingActionFactory->create(), NewCode, {"-std=c++11"}, CCName,
+            "clang-rename", std::make_shared<PCHContainerOperations>(),
+            FileContents))
+      return "";
+
+    const std::vector<std::vector<std::string>> &USRList =
+        FindingAction.getUSRList();
+    std::vector<std::string> NewNames = {NewName};
+    std::map<std::string, tooling::Replacements> FileToReplacements;
+    tooling::QualifiedRenamingAction RenameAction(NewNames, USRList,
+                                                  FileToReplacements);
+    auto RenameActionFactory = tooling::newFrontendActionFactory(&RenameAction);
+    if (!tooling::runToolOnCodeWithArgs(
+            RenameActionFactory->create(), NewCode, {"-std=c++11"}, CCName,
+            "clang-rename", std::make_shared<PCHContainerOperations>(),
+            FileContents))
+      return "";
+
+    formatAndApplyAllReplacements(FileToReplacements, Context.Rewrite, "llvm");
+    return Context.getRewrittenText(InputFileID);
+  }
+
+  void CompareSnippets(StringRef Expected, StringRef Actual) {
+    std::string ExpectedCode;
+    llvm::raw_string_ostream(ExpectedCode) << llvm::format(
+        "#include \"%s\"\n%s", HeaderName.c_str(), Expected.str().c_str());
+    EXPECT_EQ(format(ExpectedCode), format(Actual));
+  }
+
+  std::string format(llvm::StringRef Code) {
+    tooling::Replacements Replaces = format::reformat(
+        format::getLLVMStyle(), Code, {tooling::Range(0, Code.size())});
+    auto ChangedCode = tooling::applyAllReplacements(Code, Replaces);
+    EXPECT_TRUE(static_cast<bool>(ChangedCode));
+    if (!ChangedCode) {
+      llvm::errs() << llvm::toString(ChangedCode.takeError());
+      return "";
+    }
+    return *ChangedCode;
+  }
+
+  std::string HeaderContent;
+  std::string HeaderName = "header.h";
+  std::string CCName = "input.cc";
+};
+
+} // namespace test
+} // namespace clang_rename
+} // namesdpace clang