Generate a unique filename for a given header

This patch is in preparation for writing the header replacement to disk.
Added getUniqueHeaderName() that generates a unique header filename in
the same directory as the header file.

Differential Revision: http://llvm-reviews.chandlerc.com/D1104

llvm-svn: 186007

1 files changed, 61 insertions, 0 deletions

diff --git a/clang-tools-extra/unittests/cpp11-migrate/UniqueHeaderNameTest.cpp b/clang-tools-extra/unittests/cpp11-migrate/UniqueHeaderNameTest.cpp
new file mode 100644
index 00000000000..4f75ec85501
--- /dev/null
+++ b/clang-tools-extra/unittests/cpp11-migrate/UniqueHeaderNameTest.cpp
@@ -0,0 +1,61 @@
+//===- unittests/cpp11-migrate/UniqueHeaderNameTest.cpp -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Test for the generateReplacementsFileName() in FileOverrides.h
+//
+//===----------------------------------------------------------------------===//
+
+#include "gtest/gtest.h"
+#include "Core/FileOverrides.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/Regex.h"
+#include "llvm/Support/system_error.h"
+
+TEST(UniqueHeaderName, testUniqueHeaderName) {
+  using namespace llvm::sys::path;
+
+  llvm::SmallString<32> TmpDir;
+  system_temp_directory(true, TmpDir);
+
+  llvm::SmallString<128> SourceFile(TmpDir);
+  append(SourceFile, "project/lib/feature.cpp");
+  native(SourceFile.c_str(), SourceFile);
+
+  llvm::SmallString<128> HeaderFile(TmpDir);
+  append(HeaderFile, "project/include/feature.h");
+  native(HeaderFile.c_str(), HeaderFile);
+
+  llvm::SmallString<128> ExpectedName("^feature.cpp_feature.h_[0-9a-f]{2}_[0-9a-f]{2}_[0-9a-f]{2}_[0-9a-f]{2}_[0-9a-f]{2}_[0-9a-f]{2}.yaml$");
+
+  llvm::SmallString<128> ActualName;
+  llvm::SmallString<128> Error;
+  bool Result =
+      generateReplacementsFileName(SourceFile, HeaderFile, ActualName, Error);
+
+  ASSERT_TRUE(Result);
+  EXPECT_TRUE(Error.empty());
+
+  // We need to check the directory name and filename separately since on
+  // Windows, the path separator is '\' which is a regex escape character.
+  llvm::SmallString<128> ExpectedHeaderPath =
+      llvm::sys::path::parent_path(HeaderFile);
+  llvm::SmallString<128> ActualHeaderPath =
+      llvm::sys::path::parent_path(ActualName);
+  llvm::SmallString<128> ActualHeaderName =
+      llvm::sys::path::filename(ActualName);
+
+  EXPECT_STREQ(ExpectedHeaderPath.c_str(), ActualHeaderPath.c_str());
+
+  llvm::Regex R(ExpectedName);
+  ASSERT_TRUE(R.match(ActualHeaderName))
+      << "ExpectedName: " << ExpectedName.c_str()
+      << "\nActualName: " << ActualName.c_str();
+  ASSERT_TRUE(Error.empty()) << "Error: " << Error.c_str();
+}