clang/unittests/Format/CleanupTest.cpp

//===- unittest/Format/CleanupTest.cpp - Code cleanup unit tests ----------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "clang/Format/Format.h"

#include "clang/Tooling/Core/Replacement.h"

#include "gtest/gtest.h"

namespace clang {
namespace format {
namespace {

class CleanupTest : public ::testing::Test {
protected:
  std::string cleanup(llvm::StringRef Code,
                      const std::vector<tooling::Range> &Ranges,
                      const FormatStyle &Style = getLLVMStyle()) {
    tooling::Replacements Replaces = format::cleanup(Style, Code, Ranges);

    std::string Result = applyAllReplacements(Code, Replaces);
    EXPECT_NE("", Result);
    return Result;
  }
};

TEST_F(CleanupTest, DeleteEmptyNamespaces) {
  std::string Code = "namespace A {\n"
                     "namespace B {\n"
                     "} // namespace B\n"
                     "} // namespace A\n\n"
                     "namespace C {\n"
                     "namespace D { int i; }\n"
                     "inline namespace E { namespace { } }\n"
                     "}";
  std::string Expected = "\n\n\n\n\nnamespace C {\n"
                         "namespace D { int i; }\n   \n"
                         "}";
  std::vector<tooling::Range> Ranges;
  Ranges.push_back(tooling::Range(28, 0));
  Ranges.push_back(tooling::Range(91, 6));
  Ranges.push_back(tooling::Range(132, 0));
  std::string Result = cleanup(Code, Ranges);
  EXPECT_EQ(Expected, Result);
}

TEST_F(CleanupTest, NamespaceWithSyntaxError) {
  std::string Code = "namespace A {\n"
                     "namespace B {\n" // missing r_brace
                     "} // namespace A\n\n"
                     "namespace C {\n"
                     "namespace D int i; }\n"
                     "inline namespace E { namespace { } }\n"
                     "}";
  std::string Expected = "namespace A {\n"
                         "\n\n\nnamespace C {\n"
                         "namespace D int i; }\n   \n"
                         "}";
  std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
  std::string Result = cleanup(Code, Ranges);
  EXPECT_EQ(Expected, Result);
}

TEST_F(CleanupTest, EmptyNamespaceNotAffected) {
  std::string Code = "namespace A {\n\n"
                     "namespace {\n\n}}";
  // Even though the namespaces are empty, but the inner most empty namespace
  // block is not affected by the changed ranges.
  std::string Expected = "namespace A {\n\n"
                         "namespace {\n\n}}";
  // Set the changed range to be the second "\n".
  std::vector<tooling::Range> Ranges(1, tooling::Range(14, 0));
  std::string Result = cleanup(Code, Ranges);
  EXPECT_EQ(Expected, Result);
}

TEST_F(CleanupTest, EmptyNamespaceWithCommentsNoBreakBeforeBrace) {
  std::string Code = "namespace A {\n"
                     "namespace B {\n"
                     "// Yo\n"
                     "} // namespace B\n"
                     "} // namespace A\n"
                     "namespace C { // Yo\n"
                     "}";
  std::string Expected = "\n\n\n\n\n\n";
  std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
  std::string Result = cleanup(Code, Ranges);
  EXPECT_EQ(Expected, Result);
}

TEST_F(CleanupTest, EmptyNamespaceWithCommentsBreakBeforeBrace) {
  std::string Code = "namespace A\n"
                     "/* Yo */ {\n"
                     "namespace B\n"
                     "{\n"
                     "// Yo\n"
                     "} // namespace B\n"
                     "} // namespace A\n"
                     "namespace C\n"
                     "{ // Yo\n"
                     "}\n";
  std::string Expected = "\n\n\n\n\n\n\n\n\n\n";
  std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
  FormatStyle Style = getLLVMStyle();
  Style.BraceWrapping.AfterNamespace = true;
  std::string Result = cleanup(Code, Ranges, Style);
  EXPECT_EQ(Expected, Result);
}

} // end namespace
} // end namespace format
} // end namespace clang