unittests/Format/CleanupTest.cpp - clang - Git at Google

 //===- unittest/Format/CleanupTest.cpp - Code cleanup unit tests ----------===//
 //
 // 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 "clang/Format/Format.h"

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

 #include "gtest/gtest.h"

 using clang::tooling::ReplacementTest;
 using clang::tooling::toReplacements;

 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);

     auto Result = applyAllReplacements(Code, Replaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     return *Result;
   }

   // Returns code after cleanup around \p Offsets.
   std::string cleanupAroundOffsets(llvm::ArrayRef<unsigned> Offsets,
                                    llvm::StringRef Code,
                                    const FormatStyle &Style = getLLVMStyle()) {
     std::vector<tooling::Range> Ranges;
     for (auto Offset : Offsets)
       Ranges.push_back(tooling::Range(Offset, 0));
     return cleanup(Code, Ranges, Style);
   }
 };

 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"
                          "}";
   EXPECT_EQ(Expected, cleanupAroundOffsets({28, 91, 132}, Code));
 }

 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()));
   EXPECT_EQ(Expected, cleanup(Code, Ranges));
 }

 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".
   EXPECT_EQ(Expected, cleanupAroundOffsets({14}, Code));
 }

 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);
 }

 TEST_F(CleanupTest, EmptyNamespaceAroundConditionalCompilation) {
   std::string Code = "#ifdef A\n"
                      "int a;\n"
                      "int b;\n"
                      "#else\n"
                      "#endif\n"
                      "namespace {}";
   std::string Expected = "#ifdef A\n"
                          "int a;\n"
                          "int b;\n"
                          "#else\n"
                          "#endif\n";
   std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
   FormatStyle Style = getLLVMStyle();
   std::string Result = cleanup(Code, Ranges, Style);
   EXPECT_EQ(Expected, Result);
 }

 TEST_F(CleanupTest, CtorInitializationSimpleRedundantComma) {
   std::string Code = "class A {\nA() : , {} };";
   std::string Expected = "class A {\nA()  {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({17, 19}, Code));

   Code = "class A {\nA() : x(1), {} };";
   Expected = "class A {\nA() : x(1) {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({23}, Code));

   Code = "class A {\nA() :,,,,{} };";
   Expected = "class A {\nA() {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({15}, Code));
 }

 TEST_F(CleanupTest, CtorInitializationSimpleRedundantColon) {
   std::string Code = "class A {\nA() : =default; };";
   std::string Expected = "class A {\nA()  =default; };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({15}, Code));

   Code = "class A {\nA() : , =default; };";
   Expected = "class A {\nA()  =default; };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({15}, Code));
 }

 TEST_F(CleanupTest, ListRedundantComma) {
   std::string Code = "void f() { std::vector<int> v = {1,2,,,3,{4,5}}; }";
   std::string Expected = "void f() { std::vector<int> v = {1,2,3,{4,5}}; }";
   EXPECT_EQ(Expected, cleanupAroundOffsets({40}, Code));

   Code = "int main() { f(1,,2,3,,4);}";
   Expected = "int main() { f(1,2,3,4);}";
   EXPECT_EQ(Expected, cleanupAroundOffsets({17, 22}, Code));
 }

 TEST_F(CleanupTest, NoCleanupsForJavaScript) {
   std::string Code = "function f() { var x = [a, b, , c]; }";
   std::string Expected = "function f() { var x = [a, b, , c]; }";
   const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript);

   EXPECT_EQ(Expected, cleanupAroundOffsets({30}, Code, Style));
 }

 TEST_F(CleanupTest, TrailingCommaInParens) {
   std::string Code = "int main() { f(,1,,2,3,f(1,2,),4,,);}";
   std::string Expected = "int main() { f(1,2,3,f(1,2),4);}";
   EXPECT_EQ(Expected, cleanupAroundOffsets({15, 18, 29, 33}, Code));

   // Lambda contents are also checked for trailing commas.
   Code = "int main() { [](){f(,1,,2,3,f(1,2,),4,,);}();}";
   Expected = "int main() { [](){f(1,2,3,f(1,2),4);}();}";
   EXPECT_EQ(Expected, cleanupAroundOffsets({20, 23, 34, 38}, Code));
 }

 TEST_F(CleanupTest, TrailingCommaInBraces) {
   // Trailing comma is allowed in brace list.
   // If there was trailing comma in the original code, then trailing comma is
   // preserved. In this example, element between the last two commas is deleted
   // causing the second-last comma to be redundant.
   std::string Code = "void f() { std::vector<int> v = {1,2,3,,}; }";
   std::string Expected = "void f() { std::vector<int> v = {1,2,3,}; }";
   EXPECT_EQ(Expected, cleanupAroundOffsets({39}, Code));

   // If there was no trailing comma in the original code, then trailing comma
   // introduced by replacements should be cleaned up. In this example, the
   // element after the last comma is deleted causing the last comma to be
   // redundant.
   Code = "void f() { std::vector<int> v = {1,2,3,}; }";
   // FIXME: redundant trailing comma should be removed.
   Expected = "void f() { std::vector<int> v = {1,2,3,}; }";
   EXPECT_EQ(Expected, cleanupAroundOffsets({39}, Code));

   // Still no trailing comma in the original code, but two elements are deleted,
   // which makes it seems like there was trailing comma.
   Code = "void f() { std::vector<int> v = {1, 2, 3, , }; }";
   // FIXME: redundant trailing comma should also be removed.
   Expected = "void f() { std::vector<int> v = {1, 2, 3,  }; }";
   EXPECT_EQ(Expected, cleanupAroundOffsets({42, 44}, Code));
 }

 TEST_F(CleanupTest, CtorInitializationBracesInParens) {
   std::string Code = "class A {\nA() : x({1}),, {} };";
   std::string Expected = "class A {\nA() : x({1}) {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({24, 26}, Code));
 }

 TEST_F(CleanupTest, RedundantCommaNotInAffectedRanges) {
   std::string Code =
       "class A {\nA() : x({1}), /* comment */, { int x = 0; } };";
   std::string Expected =
       "class A {\nA() : x({1}), /* comment */, { int x = 0; } };";
   // Set the affected range to be "int x = 0", which does not intercept the
   // constructor initialization list.
   std::vector<tooling::Range> Ranges(1, tooling::Range(42, 9));
   std::string Result = cleanup(Code, Ranges);
   EXPECT_EQ(Expected, Result);

   Code = "class A {\nA() : x(1), {} };";
   Expected = "class A {\nA() : x(1), {} };";
   // No range. Fixer should do nothing.
   Ranges.clear();
   Result = cleanup(Code, Ranges);
   EXPECT_EQ(Expected, Result);
 }

 TEST_F(CleanupTest, RemoveCommentsAroundDeleteCode) {
   std::string Code =
       "class A {\nA() : x({1}), /* comment */, /* comment */ {} };";
   std::string Expected = "class A {\nA() : x({1}) {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({25, 40}, Code));

   Code = "class A {\nA() : x({1}), // comment\n {} };";
   Expected = "class A {\nA() : x({1})\n {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({25}, Code));

   Code = "class A {\nA() : x({1}), // comment\n , y(1),{} };";
   Expected = "class A {\nA() : x({1}),  y(1){} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({38}, Code));

   Code = "class A {\nA() : x({1}), \n/* comment */, y(1),{} };";
   Expected = "class A {\nA() : x({1}), \n y(1){} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({40}, Code));

   Code = "class A {\nA() : , // comment\n y(1),{} };";
   Expected = "class A {\nA() :  // comment\n y(1){} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({17}, Code));

   Code = "class A {\nA() // comment\n : ,,{} };";
   Expected = "class A {\nA() // comment\n {} };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({30}, Code));

   Code = "class A {\nA() // comment\n : ,,=default; };";
   Expected = "class A {\nA() // comment\n =default; };";
   EXPECT_EQ(Expected, cleanupAroundOffsets({30}, Code));
 }

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

 class CleanUpReplacementsTest : public ReplacementTest {
 protected:
   tooling::Replacement createReplacement(unsigned Offset, unsigned Length,
                                          StringRef Text) {
     return tooling::Replacement(FileName, Offset, Length, Text);
   }

   tooling::Replacement createInsertion(StringRef IncludeDirective) {
     return createReplacement(UINT_MAX, 0, IncludeDirective);
   }

   tooling::Replacement createDeletion(StringRef HeaderName) {
     return createReplacement(UINT_MAX, 1, HeaderName);
   }

   inline std::string apply(StringRef Code,
                            const tooling::Replacements &Replaces) {
     auto CleanReplaces = cleanupAroundReplacements(Code, Replaces, Style);
     EXPECT_TRUE(static_cast<bool>(CleanReplaces))
         << llvm::toString(CleanReplaces.takeError()) << "\n";
     auto Result = applyAllReplacements(Code, *CleanReplaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     return *Result;
   }

   inline std::string formatAndApply(StringRef Code,
                                     const tooling::Replacements &Replaces) {
     auto CleanReplaces = cleanupAroundReplacements(Code, Replaces, Style);
     EXPECT_TRUE(static_cast<bool>(CleanReplaces))
         << llvm::toString(CleanReplaces.takeError()) << "\n";
     auto FormattedReplaces = formatReplacements(Code, *CleanReplaces, Style);
     EXPECT_TRUE(static_cast<bool>(FormattedReplaces))
         << llvm::toString(FormattedReplaces.takeError()) << "\n";
     auto Result = applyAllReplacements(Code, *FormattedReplaces);
     EXPECT_TRUE(static_cast<bool>(Result));
     return *Result;
   }

   int getOffset(StringRef Code, int Line, int Column) {
     RewriterTestContext Context;
     FileID ID = Context.createInMemoryFile(FileName, Code);
     auto DecomposedLocation =
         Context.Sources.getDecomposedLoc(Context.getLocation(ID, Line, Column));
     return DecomposedLocation.second;
   }

   const std::string FileName = "fix.cpp";
   FormatStyle Style = getLLVMStyle();
 };

 TEST_F(CleanUpReplacementsTest, FixOnlyAffectedCodeAfterReplacements) {
   std::string Code = "namespace A {\n"
                      "namespace B {\n"
                      "  int x;\n"
                      "} // namespace B\n"
                      "} // namespace A\n"
                      "\n"
                      "namespace C {\n"
                      "namespace D { int i; }\n"
                      "inline namespace E { namespace { int y; } }\n"
                      "int x=     0;"
                      "}";
   std::string Expected = "\n\nnamespace C {\n"
                          "namespace D { int i; }\n\n"
                          "int x=     0;"
                          "}";
   tooling::Replacements Replaces =
       toReplacements({createReplacement(getOffset(Code, 3, 3), 6, ""),
                       createReplacement(getOffset(Code, 9, 34), 6, "")});

   EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, InsertMultipleIncludesLLVMStyle) {
   std::string Code = "#include \"x/fix.h\"\n"
                      "#include \"a.h\"\n"
                      "#include \"b.h\"\n"
                      "#include \"z.h\"\n"
                      "#include \"clang/Format/Format.h\"\n"
                      "#include <memory>\n";
   std::string Expected = "#include \"x/fix.h\"\n"
                          "#include \"a.h\"\n"
                          "#include \"b.h\"\n"
                          "#include \"new/new.h\"\n"
                          "#include \"z.h\"\n"
                          "#include \"clang/Format/Format.h\"\n"
                          "#include <list>\n"
                          "#include <memory>\n";
   tooling::Replacements Replaces =
       toReplacements({createInsertion("#include <list>"),
                       createInsertion("#include \"new/new.h\"")});
   EXPECT_EQ(Expected, apply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, InsertMultipleIncludesGoogleStyle) {
   std::string Code = "#include \"x/fix.h\"\n"
                      "\n"
                      "#include <vector>\n"
                      "\n"
                      "#include \"y/a.h\"\n"
                      "#include \"z/b.h\"\n";
   std::string Expected = "#include \"x/fix.h\"\n"
                          "\n"
                          "#include <list>\n"
                          "#include <vector>\n"
                          "\n"
                          "#include \"x/x.h\"\n"
                          "#include \"y/a.h\"\n"
                          "#include \"z/b.h\"\n";
   tooling::Replacements Replaces =
       toReplacements({createInsertion("#include <list>"),
                       createInsertion("#include \"x/x.h\"")});
   Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp);
   EXPECT_EQ(Expected, apply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, InsertMultipleNewHeadersAndSortLLVM) {
   std::string Code = "\nint x;";
   std::string Expected = "\n#include \"fix.h\"\n"
                          "#include \"a.h\"\n"
                          "#include \"b.h\"\n"
                          "#include \"c.h\"\n"
                          "#include <list>\n"
                          "#include <vector>\n"
                          "int x;";
   tooling::Replacements Replaces = toReplacements(
       {createInsertion("#include \"a.h\""), createInsertion("#include \"c.h\""),
        createInsertion("#include \"b.h\""),
        createInsertion("#include <vector>"), createInsertion("#include <list>"),
        createInsertion("#include \"fix.h\"")});
   EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, InsertMultipleNewHeadersAndSortGoogle) {
   std::string Code = "\nint x;";
   std::string Expected = "\n#include \"fix.h\"\n"
                          "\n"
                          "#include <list>\n"
                          "#include <vector>\n"
                          "\n"
                          "#include \"a.h\"\n"
                          "#include \"b.h\"\n"
                          "#include \"c.h\"\n"
                          "int x;";
   tooling::Replacements Replaces = toReplacements(
       {createInsertion("#include \"a.h\""), createInsertion("#include \"c.h\""),
        createInsertion("#include \"b.h\""),
        createInsertion("#include <vector>"), createInsertion("#include <list>"),
        createInsertion("#include \"fix.h\"")});
   Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp);
   EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, NoNewLineAtTheEndOfCodeMultipleInsertions) {
   std::string Code = "#include <map>";
   // FIXME: a better behavior is to only append on newline to Code, but this
   // case should be rare in practice.
   std::string Expected =
       "#include <map>\n#include <string>\n\n#include <vector>\n";
   tooling::Replacements Replaces =
       toReplacements({createInsertion("#include <string>"),
                       createInsertion("#include <vector>")});
   EXPECT_EQ(Expected, apply(Code, Replaces));
 }


 TEST_F(CleanUpReplacementsTest, FormatCorrectLineWhenHeadersAreInserted) {
   std::string Code = "\n"
                      "int x;\n"
                      "int    a;\n"
                      "int    a;\n"
                      "int    a;";

   std::string Expected = "\n#include \"x.h\"\n"
                          "#include \"y.h\"\n"
                          "#include \"clang/x/x.h\"\n"
                          "#include <list>\n"
                          "#include <vector>\n"
                          "int x;\n"
                          "int    a;\n"
                          "int b;\n"
                          "int    a;";
   tooling::Replacements Replaces = toReplacements(
       {createReplacement(getOffset(Code, 4, 8), 1, "b"),
        createInsertion("#include <vector>"), createInsertion("#include <list>"),
        createInsertion("#include \"clang/x/x.h\""),
        createInsertion("#include \"y.h\""),
        createInsertion("#include \"x.h\"")});
   EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, SimpleDeleteIncludes) {
   std::string Code = "#include \"abc.h\"\n"
                      "#include \"xyz.h\" // comment\n"
                      "#include \"xyz\"\n"
                      "int x;\n";
   std::string Expected = "#include \"xyz\"\n"
                          "int x;\n";
   tooling::Replacements Replaces =
       toReplacements({createDeletion("abc.h"), createDeletion("xyz.h")});
   EXPECT_EQ(Expected, apply(Code, Replaces));
 }

 TEST_F(CleanUpReplacementsTest, InsertionAndDeleteHeader) {
   std::string Code = "#include \"a.h\"\n"
                      "\n"
                      "#include <vector>\n";
   std::string Expected = "#include \"a.h\"\n"
                          "\n"
                          "#include <map>\n";
   tooling::Replacements Replaces = toReplacements(
       {createDeletion("<vector>"), createInsertion("#include <map>")});
   EXPECT_EQ(Expected, apply(Code, Replaces));
 }

 } // end namespace
 } // end namespace format
 } // end namespace clang
	//===- unittest/Format/CleanupTest.cpp - Code cleanup unit tests ----------===//
	//
	// 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 "clang/Format/Format.h"

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

	#include "gtest/gtest.h"

	using clang::tooling::ReplacementTest;
	using clang::tooling::toReplacements;

	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);

	auto Result = applyAllReplacements(Code, Replaces);
	EXPECT_TRUE(static_cast<bool>(Result));
	return *Result;
	}

	// Returns code after cleanup around \p Offsets.
	std::string cleanupAroundOffsets(llvm::ArrayRef<unsigned> Offsets,
	llvm::StringRef Code,
	const FormatStyle &Style = getLLVMStyle()) {
	std::vector<tooling::Range> Ranges;
	for (auto Offset : Offsets)
	Ranges.push_back(tooling::Range(Offset, 0));
	return cleanup(Code, Ranges, Style);
	}
	};

	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"
	"}";
	EXPECT_EQ(Expected, cleanupAroundOffsets({28, 91, 132}, Code));
	}

	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()));
	EXPECT_EQ(Expected, cleanup(Code, Ranges));
	}

	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".
	EXPECT_EQ(Expected, cleanupAroundOffsets({14}, Code));
	}

	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);
	}

	TEST_F(CleanupTest, EmptyNamespaceAroundConditionalCompilation) {
	std::string Code = "#ifdef A\n"
	"int a;\n"
	"int b;\n"
	"#else\n"
	"#endif\n"
	"namespace {}";
	std::string Expected = "#ifdef A\n"
	"int a;\n"
	"int b;\n"
	"#else\n"
	"#endif\n";
	std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
	FormatStyle Style = getLLVMStyle();
	std::string Result = cleanup(Code, Ranges, Style);
	EXPECT_EQ(Expected, Result);
	}

	TEST_F(CleanupTest, CtorInitializationSimpleRedundantComma) {
	std::string Code = "class A {\nA() : , {} };";
	std::string Expected = "class A {\nA() {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({17, 19}, Code));

	Code = "class A {\nA() : x(1), {} };";
	Expected = "class A {\nA() : x(1) {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({23}, Code));

	Code = "class A {\nA() :,,,,{} };";
	Expected = "class A {\nA() {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({15}, Code));
	}

	TEST_F(CleanupTest, CtorInitializationSimpleRedundantColon) {
	std::string Code = "class A {\nA() : =default; };";
	std::string Expected = "class A {\nA() =default; };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({15}, Code));

	Code = "class A {\nA() : , =default; };";
	Expected = "class A {\nA() =default; };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({15}, Code));
	}

	TEST_F(CleanupTest, ListRedundantComma) {
	std::string Code = "void f() { std::vector<int> v = {1,2,,,3,{4,5}}; }";
	std::string Expected = "void f() { std::vector<int> v = {1,2,3,{4,5}}; }";
	EXPECT_EQ(Expected, cleanupAroundOffsets({40}, Code));

	Code = "int main() { f(1,,2,3,,4);}";
	Expected = "int main() { f(1,2,3,4);}";
	EXPECT_EQ(Expected, cleanupAroundOffsets({17, 22}, Code));
	}

	TEST_F(CleanupTest, NoCleanupsForJavaScript) {
	std::string Code = "function f() { var x = [a, b, , c]; }";
	std::string Expected = "function f() { var x = [a, b, , c]; }";
	const FormatStyle &Style = getGoogleStyle(FormatStyle::LK_JavaScript);

	EXPECT_EQ(Expected, cleanupAroundOffsets({30}, Code, Style));
	}

	TEST_F(CleanupTest, TrailingCommaInParens) {
	std::string Code = "int main() { f(,1,,2,3,f(1,2,),4,,);}";
	std::string Expected = "int main() { f(1,2,3,f(1,2),4);}";
	EXPECT_EQ(Expected, cleanupAroundOffsets({15, 18, 29, 33}, Code));

	// Lambda contents are also checked for trailing commas.
	Code = "int main() { [](){f(,1,,2,3,f(1,2,),4,,);}();}";
	Expected = "int main() { [](){f(1,2,3,f(1,2),4);}();}";
	EXPECT_EQ(Expected, cleanupAroundOffsets({20, 23, 34, 38}, Code));
	}

	TEST_F(CleanupTest, TrailingCommaInBraces) {
	// Trailing comma is allowed in brace list.
	// If there was trailing comma in the original code, then trailing comma is
	// preserved. In this example, element between the last two commas is deleted
	// causing the second-last comma to be redundant.
	std::string Code = "void f() { std::vector<int> v = {1,2,3,,}; }";
	std::string Expected = "void f() { std::vector<int> v = {1,2,3,}; }";
	EXPECT_EQ(Expected, cleanupAroundOffsets({39}, Code));

	// If there was no trailing comma in the original code, then trailing comma
	// introduced by replacements should be cleaned up. In this example, the
	// element after the last comma is deleted causing the last comma to be
	// redundant.
	Code = "void f() { std::vector<int> v = {1,2,3,}; }";
	// FIXME: redundant trailing comma should be removed.
	Expected = "void f() { std::vector<int> v = {1,2,3,}; }";
	EXPECT_EQ(Expected, cleanupAroundOffsets({39}, Code));

	// Still no trailing comma in the original code, but two elements are deleted,
	// which makes it seems like there was trailing comma.
	Code = "void f() { std::vector<int> v = {1, 2, 3, , }; }";
	// FIXME: redundant trailing comma should also be removed.
	Expected = "void f() { std::vector<int> v = {1, 2, 3, }; }";
	EXPECT_EQ(Expected, cleanupAroundOffsets({42, 44}, Code));
	}

	TEST_F(CleanupTest, CtorInitializationBracesInParens) {
	std::string Code = "class A {\nA() : x({1}),, {} };";
	std::string Expected = "class A {\nA() : x({1}) {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({24, 26}, Code));
	}

	TEST_F(CleanupTest, RedundantCommaNotInAffectedRanges) {
	std::string Code =
	"class A {\nA() : x({1}), /* comment */, { int x = 0; } };";
	std::string Expected =
	"class A {\nA() : x({1}), /* comment */, { int x = 0; } };";
	// Set the affected range to be "int x = 0", which does not intercept the
	// constructor initialization list.
	std::vector<tooling::Range> Ranges(1, tooling::Range(42, 9));
	std::string Result = cleanup(Code, Ranges);
	EXPECT_EQ(Expected, Result);

	Code = "class A {\nA() : x(1), {} };";
	Expected = "class A {\nA() : x(1), {} };";
	// No range. Fixer should do nothing.
	Ranges.clear();
	Result = cleanup(Code, Ranges);
	EXPECT_EQ(Expected, Result);
	}

	TEST_F(CleanupTest, RemoveCommentsAroundDeleteCode) {
	std::string Code =
	"class A {\nA() : x({1}), /* comment /, / comment */ {} };";
	std::string Expected = "class A {\nA() : x({1}) {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({25, 40}, Code));

	Code = "class A {\nA() : x({1}), // comment\n {} };";
	Expected = "class A {\nA() : x({1})\n {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({25}, Code));

	Code = "class A {\nA() : x({1}), // comment\n , y(1),{} };";
	Expected = "class A {\nA() : x({1}), y(1){} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({38}, Code));

	Code = "class A {\nA() : x({1}), \n/* comment */, y(1),{} };";
	Expected = "class A {\nA() : x({1}), \n y(1){} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({40}, Code));

	Code = "class A {\nA() : , // comment\n y(1),{} };";
	Expected = "class A {\nA() : // comment\n y(1){} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({17}, Code));

	Code = "class A {\nA() // comment\n : ,,{} };";
	Expected = "class A {\nA() // comment\n {} };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({30}, Code));

	Code = "class A {\nA() // comment\n : ,,=default; };";
	Expected = "class A {\nA() // comment\n =default; };";
	EXPECT_EQ(Expected, cleanupAroundOffsets({30}, Code));
	}

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

	class CleanUpReplacementsTest : public ReplacementTest {
	protected:
	tooling::Replacement createReplacement(unsigned Offset, unsigned Length,
	StringRef Text) {
	return tooling::Replacement(FileName, Offset, Length, Text);
	}

	tooling::Replacement createInsertion(StringRef IncludeDirective) {
	return createReplacement(UINT_MAX, 0, IncludeDirective);
	}

	tooling::Replacement createDeletion(StringRef HeaderName) {
	return createReplacement(UINT_MAX, 1, HeaderName);
	}

	inline std::string apply(StringRef Code,
	const tooling::Replacements &Replaces) {
	auto CleanReplaces = cleanupAroundReplacements(Code, Replaces, Style);
	EXPECT_TRUE(static_cast<bool>(CleanReplaces))
	<< llvm::toString(CleanReplaces.takeError()) << "\n";
	auto Result = applyAllReplacements(Code, *CleanReplaces);
	EXPECT_TRUE(static_cast<bool>(Result));
	return *Result;
	}

	inline std::string formatAndApply(StringRef Code,
	const tooling::Replacements &Replaces) {
	auto CleanReplaces = cleanupAroundReplacements(Code, Replaces, Style);
	EXPECT_TRUE(static_cast<bool>(CleanReplaces))
	<< llvm::toString(CleanReplaces.takeError()) << "\n";
	auto FormattedReplaces = formatReplacements(Code, *CleanReplaces, Style);
	EXPECT_TRUE(static_cast<bool>(FormattedReplaces))
	<< llvm::toString(FormattedReplaces.takeError()) << "\n";
	auto Result = applyAllReplacements(Code, *FormattedReplaces);
	EXPECT_TRUE(static_cast<bool>(Result));
	return *Result;
	}

	int getOffset(StringRef Code, int Line, int Column) {
	RewriterTestContext Context;
	FileID ID = Context.createInMemoryFile(FileName, Code);
	auto DecomposedLocation =
	Context.Sources.getDecomposedLoc(Context.getLocation(ID, Line, Column));
	return DecomposedLocation.second;
	}

	const std::string FileName = "fix.cpp";
	FormatStyle Style = getLLVMStyle();
	};

	TEST_F(CleanUpReplacementsTest, FixOnlyAffectedCodeAfterReplacements) {
	std::string Code = "namespace A {\n"
	"namespace B {\n"
	" int x;\n"
	"} // namespace B\n"
	"} // namespace A\n"
	"\n"
	"namespace C {\n"
	"namespace D { int i; }\n"
	"inline namespace E { namespace { int y; } }\n"
	"int x= 0;"
	"}";
	std::string Expected = "\n\nnamespace C {\n"
	"namespace D { int i; }\n\n"
	"int x= 0;"
	"}";
	tooling::Replacements Replaces =
	toReplacements({createReplacement(getOffset(Code, 3, 3), 6, ""),
	createReplacement(getOffset(Code, 9, 34), 6, "")});

	EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, InsertMultipleIncludesLLVMStyle) {
	std::string Code = "#include \"x/fix.h\"\n"
	"#include \"a.h\"\n"
	"#include \"b.h\"\n"
	"#include \"z.h\"\n"
	"#include \"clang/Format/Format.h\"\n"
	"#include <memory>\n";
	std::string Expected = "#include \"x/fix.h\"\n"
	"#include \"a.h\"\n"
	"#include \"b.h\"\n"
	"#include \"new/new.h\"\n"
	"#include \"z.h\"\n"
	"#include \"clang/Format/Format.h\"\n"
	"#include <list>\n"
	"#include <memory>\n";
	tooling::Replacements Replaces =
	toReplacements({createInsertion("#include <list>"),
	createInsertion("#include \"new/new.h\"")});
	EXPECT_EQ(Expected, apply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, InsertMultipleIncludesGoogleStyle) {
	std::string Code = "#include \"x/fix.h\"\n"
	"\n"
	"#include <vector>\n"
	"\n"
	"#include \"y/a.h\"\n"
	"#include \"z/b.h\"\n";
	std::string Expected = "#include \"x/fix.h\"\n"
	"\n"
	"#include <list>\n"
	"#include <vector>\n"
	"\n"
	"#include \"x/x.h\"\n"
	"#include \"y/a.h\"\n"
	"#include \"z/b.h\"\n";
	tooling::Replacements Replaces =
	toReplacements({createInsertion("#include <list>"),
	createInsertion("#include \"x/x.h\"")});
	Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp);
	EXPECT_EQ(Expected, apply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, InsertMultipleNewHeadersAndSortLLVM) {
	std::string Code = "\nint x;";
	std::string Expected = "\n#include \"fix.h\"\n"
	"#include \"a.h\"\n"
	"#include \"b.h\"\n"
	"#include \"c.h\"\n"
	"#include <list>\n"
	"#include <vector>\n"
	"int x;";
	tooling::Replacements Replaces = toReplacements(
	{createInsertion("#include \"a.h\""), createInsertion("#include \"c.h\""),
	createInsertion("#include \"b.h\""),
	createInsertion("#include <vector>"), createInsertion("#include <list>"),
	createInsertion("#include \"fix.h\"")});
	EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, InsertMultipleNewHeadersAndSortGoogle) {
	std::string Code = "\nint x;";
	std::string Expected = "\n#include \"fix.h\"\n"
	"\n"
	"#include <list>\n"
	"#include <vector>\n"
	"\n"
	"#include \"a.h\"\n"
	"#include \"b.h\"\n"
	"#include \"c.h\"\n"
	"int x;";
	tooling::Replacements Replaces = toReplacements(
	{createInsertion("#include \"a.h\""), createInsertion("#include \"c.h\""),
	createInsertion("#include \"b.h\""),
	createInsertion("#include <vector>"), createInsertion("#include <list>"),
	createInsertion("#include \"fix.h\"")});
	Style = format::getGoogleStyle(format::FormatStyle::LanguageKind::LK_Cpp);
	EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, NoNewLineAtTheEndOfCodeMultipleInsertions) {
	std::string Code = "#include <map>";
	// FIXME: a better behavior is to only append on newline to Code, but this
	// case should be rare in practice.
	std::string Expected =
	"#include <map>\n#include <string>\n\n#include <vector>\n";
	tooling::Replacements Replaces =
	toReplacements({createInsertion("#include <string>"),
	createInsertion("#include <vector>")});
	EXPECT_EQ(Expected, apply(Code, Replaces));
	}


	TEST_F(CleanUpReplacementsTest, FormatCorrectLineWhenHeadersAreInserted) {
	std::string Code = "\n"
	"int x;\n"
	"int a;\n"
	"int a;\n"
	"int a;";

	std::string Expected = "\n#include \"x.h\"\n"
	"#include \"y.h\"\n"
	"#include \"clang/x/x.h\"\n"
	"#include <list>\n"
	"#include <vector>\n"
	"int x;\n"
	"int a;\n"
	"int b;\n"
	"int a;";
	tooling::Replacements Replaces = toReplacements(
	{createReplacement(getOffset(Code, 4, 8), 1, "b"),
	createInsertion("#include <vector>"), createInsertion("#include <list>"),
	createInsertion("#include \"clang/x/x.h\""),
	createInsertion("#include \"y.h\""),
	createInsertion("#include \"x.h\"")});
	EXPECT_EQ(Expected, formatAndApply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, SimpleDeleteIncludes) {
	std::string Code = "#include \"abc.h\"\n"
	"#include \"xyz.h\" // comment\n"
	"#include \"xyz\"\n"
	"int x;\n";
	std::string Expected = "#include \"xyz\"\n"
	"int x;\n";
	tooling::Replacements Replaces =
	toReplacements({createDeletion("abc.h"), createDeletion("xyz.h")});
	EXPECT_EQ(Expected, apply(Code, Replaces));
	}

	TEST_F(CleanUpReplacementsTest, InsertionAndDeleteHeader) {
	std::string Code = "#include \"a.h\"\n"
	"\n"
	"#include <vector>\n";
	std::string Expected = "#include \"a.h\"\n"
	"\n"
	"#include <map>\n";
	tooling::Replacements Replaces = toReplacements(
	{createDeletion("<vector>"), createInsertion("#include <map>")});
	EXPECT_EQ(Expected, apply(Code, Replaces));
	}

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