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RefactoringTest.cpp
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//===- unittest/Tooling/RefactoringTest.cpp - Refactoring unit tests ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ReplacementTest.h"
#include "RewriterTestContext.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclGroup.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/VirtualFileSystem.h"
#include "clang/Format/Format.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendAction.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "clang/Tooling/Refactoring.h"
#include "clang/Tooling/Refactoring/AtomicChange.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/SmallString.h"
#include "gtest/gtest.h"
namespace clang {
namespace tooling {
TEST_F(ReplacementTest, CanDeleteAllText) {
FileID ID = Context.createInMemoryFile("input.cpp", "text");
SourceLocation Location = Context.getLocation(ID, 1, 1);
Replacement Replace(createReplacement(Location, 4, ""));
EXPECT_TRUE(Replace.apply(Context.Rewrite));
EXPECT_EQ("", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, CanDeleteAllTextInTextWithNewlines) {
FileID ID = Context.createInMemoryFile("input.cpp", "line1\nline2\nline3");
SourceLocation Location = Context.getLocation(ID, 1, 1);
Replacement Replace(createReplacement(Location, 17, ""));
EXPECT_TRUE(Replace.apply(Context.Rewrite));
EXPECT_EQ("", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, CanAddText) {
FileID ID = Context.createInMemoryFile("input.cpp", "");
SourceLocation Location = Context.getLocation(ID, 1, 1);
Replacement Replace(createReplacement(Location, 0, "result"));
EXPECT_TRUE(Replace.apply(Context.Rewrite));
EXPECT_EQ("result", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, CanReplaceTextAtPosition) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
SourceLocation Location = Context.getLocation(ID, 2, 3);
Replacement Replace(createReplacement(Location, 12, "x"));
EXPECT_TRUE(Replace.apply(Context.Rewrite));
EXPECT_EQ("line1\nlixne4", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, CanReplaceTextAtPositionMultipleTimes) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
SourceLocation Location1 = Context.getLocation(ID, 2, 3);
Replacement Replace1(createReplacement(Location1, 12, "x\ny\n"));
EXPECT_TRUE(Replace1.apply(Context.Rewrite));
EXPECT_EQ("line1\nlix\ny\nne4", Context.getRewrittenText(ID));
// Since the original source has not been modified, the (4, 4) points to the
// 'e' in the original content.
SourceLocation Location2 = Context.getLocation(ID, 4, 4);
Replacement Replace2(createReplacement(Location2, 1, "f"));
EXPECT_TRUE(Replace2.apply(Context.Rewrite));
EXPECT_EQ("line1\nlix\ny\nnf4", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, ApplyFailsForNonExistentLocation) {
Replacement Replace("nonexistent-file.cpp", 0, 1, "");
EXPECT_FALSE(Replace.apply(Context.Rewrite));
}
TEST_F(ReplacementTest, CanRetrivePath) {
Replacement Replace("/path/to/file.cpp", 0, 1, "");
EXPECT_EQ("/path/to/file.cpp", Replace.getFilePath());
}
TEST_F(ReplacementTest, ReturnsInvalidPath) {
Replacement Replace1(Context.Sources, SourceLocation(), 0, "");
EXPECT_TRUE(Replace1.getFilePath().empty());
Replacement Replace2;
EXPECT_TRUE(Replace2.getFilePath().empty());
}
// Checks that an llvm::Error instance contains a ReplacementError with expected
// error code, expected new replacement, and expected existing replacement.
static bool checkReplacementError(llvm::Error &&Error,
replacement_error ExpectedErr,
llvm::Optional<Replacement> ExpectedExisting,
llvm::Optional<Replacement> ExpectedNew) {
if (!Error) {
llvm::errs() << "Error is a success.";
return false;
}
std::string ErrorMessage;
llvm::raw_string_ostream OS(ErrorMessage);
llvm::handleAllErrors(std::move(Error), [&](const ReplacementError &RE) {
llvm::errs() << "Handling error...\n";
if (ExpectedErr != RE.get())
OS << "Unexpected error code: " << int(RE.get()) << "\n";
if (ExpectedExisting != RE.getExistingReplacement()) {
OS << "Expected Existing != Actual Existing.\n";
if (ExpectedExisting.hasValue())
OS << "Expected existing replacement: " << ExpectedExisting->toString()
<< "\n";
if (RE.getExistingReplacement().hasValue())
OS << "Actual existing replacement: "
<< RE.getExistingReplacement()->toString() << "\n";
}
if (ExpectedNew != RE.getNewReplacement()) {
OS << "Expected New != Actual New.\n";
if (ExpectedNew.hasValue())
OS << "Expected new replacement: " << ExpectedNew->toString() << "\n";
if (RE.getNewReplacement().hasValue())
OS << "Actual new replacement: " << RE.getNewReplacement()->toString()
<< "\n";
}
});
OS.flush();
if (ErrorMessage.empty()) return true;
llvm::errs() << ErrorMessage;
return false;
}
TEST_F(ReplacementTest, FailAddReplacements) {
Replacements Replaces;
Replacement Deletion("x.cc", 0, 10, "3");
auto Err = Replaces.add(Deletion);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Replacement OverlappingReplacement("x.cc", 0, 2, "a");
Err = Replaces.add(OverlappingReplacement);
EXPECT_TRUE(checkReplacementError(std::move(Err),
replacement_error::overlap_conflict,
Deletion, OverlappingReplacement));
Replacement ContainedReplacement("x.cc", 2, 2, "a");
Err = Replaces.add(Replacement(ContainedReplacement));
EXPECT_TRUE(checkReplacementError(std::move(Err),
replacement_error::overlap_conflict,
Deletion, ContainedReplacement));
Replacement WrongPathReplacement("y.cc", 20, 2, "");
Err = Replaces.add(WrongPathReplacement);
EXPECT_TRUE(checkReplacementError(std::move(Err),
replacement_error::wrong_file_path,
Deletion, WrongPathReplacement));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Deletion, *Replaces.begin());
}
TEST_F(ReplacementTest, DeletionInReplacements) {
Replacements Replaces;
Replacement R("x.cc", 0, 10, "3");
auto Err = Replaces.add(R);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 0, 2, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 2, 2, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(R, *Replaces.begin());
}
TEST_F(ReplacementTest, OverlappingReplacements) {
Replacements Replaces;
auto Err = Replaces.add(Replacement("x.cc", 0, 3, "345"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 2, 3, "543"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 0, 5, "34543"), *Replaces.begin());
Err = Replaces.add(Replacement("x.cc", 2, 1, "5"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 0, 5, "34543"), *Replaces.begin());
}
TEST_F(ReplacementTest, AddAdjacentInsertionAndReplacement) {
Replacements Replaces;
// Test adding an insertion at the offset of an existing replacement.
auto Err = Replaces.add(Replacement("x.cc", 10, 3, "replace"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 0, "insert"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(Replaces.size(), 2u);
Replaces.clear();
// Test overlap with an existing insertion.
Err = Replaces.add(Replacement("x.cc", 10, 0, "insert"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 3, "replace"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(Replaces.size(), 2u);
}
TEST_F(ReplacementTest, MergeNewDeletions) {
Replacements Replaces;
Replacement ContainingReplacement("x.cc", 0, 10, "");
auto Err = Replaces.add(ContainingReplacement);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 5, 3, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 0, 10, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 5, 5, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(*Replaces.begin(), ContainingReplacement);
}
TEST_F(ReplacementTest, MergeOverlappingButNotAdjacentReplacement) {
Replacements Replaces;
auto Err = Replaces.add(Replacement("x.cc", 0, 2, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 5, 5, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Replacement After = Replacement("x.cc", 10, 5, "");
Err = Replaces.add(After);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Replacement ContainingReplacement("x.cc", 0, 10, "");
Err = Replaces.add(ContainingReplacement);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(2u, Replaces.size());
EXPECT_EQ(*Replaces.begin(), ContainingReplacement);
EXPECT_EQ(*(++Replaces.begin()), After);
}
TEST_F(ReplacementTest, InsertionBeforeMergedDeletions) {
Replacements Replaces;
Replacement Insertion("x.cc", 0, 0, "123");
auto Err = Replaces.add(Insertion);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 5, 5, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Replacement Deletion("x.cc", 0, 10, "");
Err = Replaces.add(Deletion);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(2u, Replaces.size());
EXPECT_EQ(*Replaces.begin(), Insertion);
EXPECT_EQ(*(++Replaces.begin()), Deletion);
}
TEST_F(ReplacementTest, MergeOverlappingDeletions) {
Replacements Replaces;
auto Err = Replaces.add(Replacement("x.cc", 0, 2, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 0, 5, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 0, 5, ""), *Replaces.begin());
Err = Replaces.add(Replacement("x.cc", 1, 5, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 0, 6, ""), *Replaces.begin());
}
TEST_F(ReplacementTest, FailedMergeExistingDeletions) {
Replacements Replaces;
Replacement First("x.cc", 0, 2, "");
auto Err = Replaces.add(First);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Replacement Second("x.cc", 5, 5, "");
Err = Replaces.add(Second);
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 1, 10, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 0, 11, ""), *Replaces.begin());
}
TEST_F(ReplacementTest, FailAddRegression) {
Replacements Replaces;
// Create two replacements, where the second one is an insertion of the empty
// string exactly at the end of the first one.
auto Err = Replaces.add(Replacement("x.cc", 0, 10, "1"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 0, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
// Make sure we find the overlap with the first entry when inserting a
// replacement that ends exactly at the seam of the existing replacements.
Replacement OverlappingReplacement("x.cc", 5, 5, "fail");
Err = Replaces.add(OverlappingReplacement);
EXPECT_TRUE(checkReplacementError(std::move(Err),
replacement_error::overlap_conflict,
*Replaces.begin(), OverlappingReplacement));
Err = Replaces.add(Replacement("x.cc", 10, 0, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
}
TEST_F(ReplacementTest, InsertAtOffsetOfReplacement) {
Replacements Replaces;
auto Err = Replaces.add(Replacement("x.cc", 10, 2, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 0, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(Replaces.size(), 2u);
Replaces.clear();
Err = Replaces.add(Replacement("x.cc", 10, 0, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 2, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(Replaces.size(), 2u);
}
TEST_F(ReplacementTest, AddInsertAtOtherInsertWhenOderIndependent) {
Replacements Replaces;
auto Err = Replaces.add(Replacement("x.cc", 10, 0, "a"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Replacement ConflictInsertion("x.cc", 10, 0, "b");
Err = Replaces.add(ConflictInsertion);
EXPECT_TRUE(checkReplacementError(std::move(Err),
replacement_error::insert_conflict,
*Replaces.begin(), ConflictInsertion));
Replaces.clear();
Err = Replaces.add(Replacement("x.cc", 10, 0, "a"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 0, "aa"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(1u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 10, 0, "aaa"), *Replaces.begin());
Replaces.clear();
Err = Replaces.add(Replacement("x.cc", 10, 0, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 3, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 0, ""));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_EQ(2u, Replaces.size());
EXPECT_EQ(Replacement("x.cc", 10, 0, ""), *Replaces.begin());
EXPECT_EQ(Replacement("x.cc", 10, 3, ""), *std::next(Replaces.begin()));
}
TEST_F(ReplacementTest, InsertBetweenAdjacentReplacements) {
Replacements Replaces;
auto Err = Replaces.add(Replacement("x.cc", 10, 5, "a"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 8, 2, "a"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement("x.cc", 10, 0, "b"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
}
TEST_F(ReplacementTest, CanApplyReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
Replacements Replaces =
toReplacements({Replacement(Context.Sources,
Context.getLocation(ID, 2, 1), 5, "replaced"),
Replacement(Context.Sources,
Context.getLocation(ID, 3, 1), 5, "other")});
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("line1\nreplaced\nother\nline4", Context.getRewrittenText(ID));
}
// Verifies that replacement/deletion is applied before insertion at the same
// offset.
TEST_F(ReplacementTest, InsertAndDelete) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
Replacements Replaces = toReplacements(
{Replacement(Context.Sources, Context.getLocation(ID, 2, 1), 6, ""),
Replacement(Context.Sources, Context.getLocation(ID, 2, 1), 0,
"other\n")});
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("line1\nother\nline3\nline4", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, AdjacentReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"ab");
Replacements Replaces = toReplacements(
{Replacement(Context.Sources, Context.getLocation(ID, 1, 1), 1, "x"),
Replacement(Context.Sources, Context.getLocation(ID, 1, 2), 1, "y")});
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("xy", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, AddDuplicateReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
auto Replaces = toReplacements({Replacement(
Context.Sources, Context.getLocation(ID, 2, 1), 5, "replaced")});
auto Err = Replaces.add(Replacement(
Context.Sources, Context.getLocation(ID, 2, 1), 5, "replaced"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
Err = Replaces.add(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
5, "replaced"));
EXPECT_TRUE(!Err);
llvm::consumeError(std::move(Err));
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("line1\nreplaced\nline3\nline4", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, FailOrderDependentReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
auto Replaces = toReplacements({Replacement(
Context.Sources, Context.getLocation(ID, 2, 1), 5, "other")});
Replacement ConflictReplacement(Context.Sources,
Context.getLocation(ID, 2, 1), 5, "rehto");
auto Err = Replaces.add(ConflictReplacement);
EXPECT_TRUE(checkReplacementError(std::move(Err),
replacement_error::overlap_conflict,
*Replaces.begin(), ConflictReplacement));
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("line1\nother\nline3\nline4", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, InvalidSourceLocationFailsApplyAll) {
Replacements Replaces =
toReplacements({Replacement(Context.Sources, SourceLocation(), 5, "2")});
EXPECT_FALSE(applyAllReplacements(Replaces, Context.Rewrite));
}
TEST_F(ReplacementTest, MultipleFilesReplaceAndFormat) {
// Column limit is 20.
std::string Code1 = "Long *a =\n"
" new Long();\n"
"long x = 1;";
std::string Expected1 = "auto a = new Long();\n"
"long x =\n"
" 12345678901;";
std::string Code2 = "int x = 123;\n"
"int y = 0;";
std::string Expected2 = "int x =\n"
" 1234567890123;\n"
"int y = 10;";
StringRef File1 = "format_1.cpp";
StringRef File2 = "format_2.cpp";
FileID ID1 = Context.createInMemoryFile(File1, Code1);
FileID ID2 = Context.createInMemoryFile(File2, Code2);
// Scrambled the order of replacements.
std::map<std::string, Replacements> FileToReplaces;
FileToReplaces[File1] = toReplacements(
{tooling::Replacement(Context.Sources, Context.getLocation(ID1, 1, 1), 6,
"auto "),
tooling::Replacement(Context.Sources, Context.getLocation(ID1, 3, 10), 1,
"12345678901")});
FileToReplaces[File2] = toReplacements(
{tooling::Replacement(Context.Sources, Context.getLocation(ID2, 1, 12), 0,
"4567890123"),
tooling::Replacement(Context.Sources, Context.getLocation(ID2, 2, 9), 1,
"10")});
EXPECT_TRUE(
formatAndApplyAllReplacements(FileToReplaces, Context.Rewrite,
"{BasedOnStyle: LLVM, ColumnLimit: 20}"));
EXPECT_EQ(Expected1, Context.getRewrittenText(ID1));
EXPECT_EQ(Expected2, Context.getRewrittenText(ID2));
}
TEST(ShiftedCodePositionTest, FindsNewCodePosition) {
Replacements Replaces =
toReplacements({Replacement("", 0, 1, ""), Replacement("", 4, 3, " ")});
// Assume ' int i;' is turned into 'int i;' and cursor is located at '|'.
EXPECT_EQ(0u, Replaces.getShiftedCodePosition(0)); // |int i;
EXPECT_EQ(0u, Replaces.getShiftedCodePosition(1)); // |nt i;
EXPECT_EQ(1u, Replaces.getShiftedCodePosition(2)); // i|t i;
EXPECT_EQ(2u, Replaces.getShiftedCodePosition(3)); // in| i;
EXPECT_EQ(3u, Replaces.getShiftedCodePosition(4)); // int| i;
EXPECT_EQ(3u, Replaces.getShiftedCodePosition(5)); // int | i;
EXPECT_EQ(3u, Replaces.getShiftedCodePosition(6)); // int |i;
EXPECT_EQ(4u, Replaces.getShiftedCodePosition(7)); // int |;
EXPECT_EQ(5u, Replaces.getShiftedCodePosition(8)); // int i|
}
TEST(ShiftedCodePositionTest, FindsNewCodePositionWithInserts) {
Replacements Replaces = toReplacements({Replacement("", 4, 0, "\"\n\"")});
// Assume '"12345678"' is turned into '"1234"\n"5678"'.
EXPECT_EQ(3u, Replaces.getShiftedCodePosition(3)); // "123|5678"
EXPECT_EQ(7u, Replaces.getShiftedCodePosition(4)); // "1234|678"
EXPECT_EQ(8u, Replaces.getShiftedCodePosition(5)); // "12345|78"
}
TEST(ShiftedCodePositionTest, FindsNewCodePositionInReplacedText) {
// Replace the first four characters with "abcd".
auto Replaces = toReplacements({Replacement("", 0, 4, "abcd")});
for (unsigned i = 0; i < 3; ++i)
EXPECT_EQ(i, Replaces.getShiftedCodePosition(i));
}
TEST(ShiftedCodePositionTest, NoReplacementText) {
Replacements Replaces = toReplacements({Replacement("", 0, 42, "")});
EXPECT_EQ(0u, Replaces.getShiftedCodePosition(0));
EXPECT_EQ(0u, Replaces.getShiftedCodePosition(39));
EXPECT_EQ(3u, Replaces.getShiftedCodePosition(45));
EXPECT_EQ(0u, Replaces.getShiftedCodePosition(42));
}
class FlushRewrittenFilesTest : public ::testing::Test {
public:
FlushRewrittenFilesTest() {}
~FlushRewrittenFilesTest() override {
for (llvm::StringMap<std::string>::iterator I = TemporaryFiles.begin(),
E = TemporaryFiles.end();
I != E; ++I) {
llvm::StringRef Name = I->second;
std::error_code EC = llvm::sys::fs::remove(Name);
(void)EC;
assert(!EC);
}
}
FileID createFile(llvm::StringRef Name, llvm::StringRef Content) {
SmallString<1024> Path;
int FD;
std::error_code EC = llvm::sys::fs::createTemporaryFile(Name, "", FD, Path);
assert(!EC);
(void)EC;
llvm::raw_fd_ostream OutStream(FD, true);
OutStream << Content;
OutStream.close();
const FileEntry *File = Context.Files.getFile(Path);
assert(File != nullptr);
StringRef Found =
TemporaryFiles.insert(std::make_pair(Name, Path.str())).first->second;
assert(Found == Path);
(void)Found;
return Context.Sources.createFileID(File, SourceLocation(), SrcMgr::C_User);
}
std::string getFileContentFromDisk(llvm::StringRef Name) {
std::string Path = TemporaryFiles.lookup(Name);
assert(!Path.empty());
// We need to read directly from the FileManager without relaying through
// a FileEntry, as otherwise we'd read through an already opened file
// descriptor, which might not see the changes made.
// FIXME: Figure out whether there is a way to get the SourceManger to
// reopen the file.
auto FileBuffer = Context.Files.getBufferForFile(Path);
return (*FileBuffer)->getBuffer();
}
llvm::StringMap<std::string> TemporaryFiles;
RewriterTestContext Context;
};
TEST_F(FlushRewrittenFilesTest, StoresChangesOnDisk) {
FileID ID = createFile("input.cpp", "line1\nline2\nline3\nline4");
Replacements Replaces = toReplacements({Replacement(
Context.Sources, Context.getLocation(ID, 2, 1), 5, "replaced")});
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_FALSE(Context.Rewrite.overwriteChangedFiles());
EXPECT_EQ("line1\nreplaced\nline3\nline4",
getFileContentFromDisk("input.cpp"));
}
namespace {
template <typename T>
class TestVisitor : public clang::RecursiveASTVisitor<T> {
public:
bool runOver(StringRef Code) {
return runToolOnCode(new TestAction(this), Code);
}
protected:
clang::SourceManager *SM;
clang::ASTContext *Context;
private:
class FindConsumer : public clang::ASTConsumer {
public:
FindConsumer(TestVisitor *Visitor) : Visitor(Visitor) {}
void HandleTranslationUnit(clang::ASTContext &Context) override {
Visitor->TraverseDecl(Context.getTranslationUnitDecl());
}
private:
TestVisitor *Visitor;
};
class TestAction : public clang::ASTFrontendAction {
public:
TestAction(TestVisitor *Visitor) : Visitor(Visitor) {}
std::unique_ptr<clang::ASTConsumer>
CreateASTConsumer(clang::CompilerInstance &compiler,
llvm::StringRef dummy) override {
Visitor->SM = &compiler.getSourceManager();
Visitor->Context = &compiler.getASTContext();
/// TestConsumer will be deleted by the framework calling us.
return llvm::make_unique<FindConsumer>(Visitor);
}
private:
TestVisitor *Visitor;
};
};
} // end namespace
void expectReplacementAt(const Replacement &Replace,
StringRef File, unsigned Offset, unsigned Length) {
ASSERT_TRUE(Replace.isApplicable());
EXPECT_EQ(File, Replace.getFilePath());
EXPECT_EQ(Offset, Replace.getOffset());
EXPECT_EQ(Length, Replace.getLength());
}
class ClassDeclXVisitor : public TestVisitor<ClassDeclXVisitor> {
public:
bool VisitCXXRecordDecl(CXXRecordDecl *Record) {
if (Record->getName() == "X") {
Replace = Replacement(*SM, Record, "");
}
return true;
}
Replacement Replace;
};
TEST(Replacement, CanBeConstructedFromNode) {
ClassDeclXVisitor ClassDeclX;
EXPECT_TRUE(ClassDeclX.runOver(" class X;"));
expectReplacementAt(ClassDeclX.Replace, "input.cc", 5, 7);
}
TEST(Replacement, ReplacesAtSpellingLocation) {
ClassDeclXVisitor ClassDeclX;
EXPECT_TRUE(ClassDeclX.runOver("#define A(Y) Y\nA(class X);"));
expectReplacementAt(ClassDeclX.Replace, "input.cc", 17, 7);
}
class CallToFVisitor : public TestVisitor<CallToFVisitor> {
public:
bool VisitCallExpr(CallExpr *Call) {
if (Call->getDirectCallee()->getName() == "F") {
Replace = Replacement(*SM, Call, "");
}
return true;
}
Replacement Replace;
};
TEST(Replacement, FunctionCall) {
CallToFVisitor CallToF;
EXPECT_TRUE(CallToF.runOver("void F(); void G() { F(); }"));
expectReplacementAt(CallToF.Replace, "input.cc", 21, 3);
}
TEST(Replacement, TemplatedFunctionCall) {
CallToFVisitor CallToF;
EXPECT_TRUE(CallToF.runOver(
"template <typename T> void F(); void G() { F<int>(); }"));
expectReplacementAt(CallToF.Replace, "input.cc", 43, 8);
}
class NestedNameSpecifierAVisitor
: public TestVisitor<NestedNameSpecifierAVisitor> {
public:
bool TraverseNestedNameSpecifierLoc(NestedNameSpecifierLoc NNSLoc) {
if (NNSLoc.getNestedNameSpecifier()) {
if (const NamespaceDecl* NS = NNSLoc.getNestedNameSpecifier()->getAsNamespace()) {
if (NS->getName() == "a") {
Replace = Replacement(*SM, &NNSLoc, "", Context->getLangOpts());
}
}
}
return TestVisitor<NestedNameSpecifierAVisitor>::TraverseNestedNameSpecifierLoc(
NNSLoc);
}
Replacement Replace;
};
TEST(Replacement, ColonColon) {
NestedNameSpecifierAVisitor VisitNNSA;
EXPECT_TRUE(VisitNNSA.runOver("namespace a { void f() { ::a::f(); } }"));
expectReplacementAt(VisitNNSA.Replace, "input.cc", 25, 5);
}
TEST(Range, overlaps) {
EXPECT_TRUE(Range(10, 10).overlapsWith(Range(0, 11)));
EXPECT_TRUE(Range(0, 11).overlapsWith(Range(10, 10)));
EXPECT_FALSE(Range(10, 10).overlapsWith(Range(0, 10)));
EXPECT_FALSE(Range(0, 10).overlapsWith(Range(10, 10)));
EXPECT_TRUE(Range(0, 10).overlapsWith(Range(2, 6)));
EXPECT_TRUE(Range(2, 6).overlapsWith(Range(0, 10)));
}
TEST(Range, contains) {
EXPECT_TRUE(Range(0, 10).contains(Range(0, 10)));
EXPECT_TRUE(Range(0, 10).contains(Range(2, 6)));
EXPECT_FALSE(Range(2, 6).contains(Range(0, 10)));
EXPECT_FALSE(Range(0, 10).contains(Range(0, 11)));
}
TEST(Range, CalculateRangesOfReplacements) {
// Before: aaaabbbbbbz
// After : bbbbbbzzzzzzoooooooooooooooo
Replacements Replaces = toReplacements(
{Replacement("foo", 0, 4, ""), Replacement("foo", 10, 1, "zzzzzz"),
Replacement("foo", 11, 0, "oooooooooooooooo")});
std::vector<Range> Ranges = Replaces.getAffectedRanges();
EXPECT_EQ(2ul, Ranges.size());
EXPECT_TRUE(Ranges[0].getOffset() == 0);
EXPECT_TRUE(Ranges[0].getLength() == 0);
EXPECT_TRUE(Ranges[1].getOffset() == 6);
EXPECT_TRUE(Ranges[1].getLength() == 22);
}
TEST(Range, CalculateRangesOfInsertionAroundReplacement) {
Replacements Replaces = toReplacements(
{Replacement("foo", 0, 2, ""), Replacement("foo", 0, 0, "ba")});
std::vector<Range> Ranges = Replaces.getAffectedRanges();
EXPECT_EQ(1ul, Ranges.size());
EXPECT_EQ(0u, Ranges[0].getOffset());
EXPECT_EQ(2u, Ranges[0].getLength());
}
TEST(Range, RangesAfterEmptyReplacements) {
std::vector<Range> Ranges = {Range(5, 6), Range(10, 5)};
Replacements Replaces;
std::vector<Range> Expected = {Range(5, 10)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, RangesAfterReplacements) {
std::vector<Range> Ranges = {Range(5, 2), Range(10, 5)};
Replacements Replaces = toReplacements({Replacement("foo", 0, 2, "1234")});
std::vector<Range> Expected = {Range(0, 4), Range(7, 2), Range(12, 5)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, RangesBeforeReplacements) {
std::vector<Range> Ranges = {Range(5, 2), Range(10, 5)};
Replacements Replaces = toReplacements({Replacement("foo", 20, 2, "1234")});
std::vector<Range> Expected = {Range(5, 2), Range(10, 5), Range(20, 4)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, NotAffectedByReplacements) {
std::vector<Range> Ranges = {Range(0, 2), Range(5, 2), Range(10, 5)};
Replacements Replaces = toReplacements({Replacement("foo", 3, 2, "12"),
Replacement("foo", 12, 2, "12"),
Replacement("foo", 20, 5, "")});
std::vector<Range> Expected = {Range(0, 2), Range(3, 4), Range(10, 5),
Range(20, 0)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, RangesWithNonOverlappingReplacements) {
std::vector<Range> Ranges = {Range(0, 2), Range(5, 2), Range(10, 5)};
Replacements Replaces = toReplacements({Replacement("foo", 3, 1, ""),
Replacement("foo", 6, 1, "123"),
Replacement("foo", 20, 2, "12345")});
std::vector<Range> Expected = {Range(0, 2), Range(3, 0), Range(4, 4),
Range(11, 5), Range(21, 5)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, RangesWithOverlappingReplacements) {
std::vector<Range> Ranges = {Range(0, 2), Range(5, 2), Range(15, 5),
Range(30, 5)};
Replacements Replaces = toReplacements(
{Replacement("foo", 1, 3, ""), Replacement("foo", 6, 1, "123"),
Replacement("foo", 13, 3, "1"), Replacement("foo", 25, 15, "")});
std::vector<Range> Expected = {Range(0, 1), Range(2, 4), Range(12, 5),
Range(22, 0)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, MergeIntoOneRange) {
std::vector<Range> Ranges = {Range(0, 2), Range(5, 2), Range(15, 5)};
Replacements Replaces =
toReplacements({Replacement("foo", 1, 15, "1234567890")});
std::vector<Range> Expected = {Range(0, 15)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, ReplacementsStartingAtRangeOffsets) {
std::vector<Range> Ranges = {Range(0, 2), Range(5, 5), Range(15, 5)};
Replacements Replaces = toReplacements(
{Replacement("foo", 0, 2, "12"), Replacement("foo", 5, 1, "123"),
Replacement("foo", 7, 4, "12345"), Replacement("foo", 15, 10, "12")});
std::vector<Range> Expected = {Range(0, 2), Range(5, 9), Range(18, 2)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, ReplacementsEndingAtRangeEnds) {
std::vector<Range> Ranges = {Range(0, 2), Range(5, 2), Range(15, 5)};
Replacements Replaces = toReplacements(
{Replacement("foo", 6, 1, "123"), Replacement("foo", 17, 3, "12")});
std::vector<Range> Expected = {Range(0, 2), Range(5, 4), Range(17, 4)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, AjacentReplacements) {
std::vector<Range> Ranges = {Range(0, 0), Range(15, 5)};
Replacements Replaces = toReplacements(
{Replacement("foo", 1, 2, "123"), Replacement("foo", 12, 3, "1234")});
std::vector<Range> Expected = {Range(0, 0), Range(1, 3), Range(13, 9)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, MergeRangesAfterReplacements) {
std::vector<Range> Ranges = {Range(8, 0), Range(5, 2), Range(9, 0), Range(0, 1)};
Replacements Replaces = toReplacements({Replacement("foo", 1, 3, ""),
Replacement("foo", 7, 0, "12"),
Replacement("foo", 9, 2, "")});
std::vector<Range> Expected = {Range(0, 1), Range(2, 4), Range(7, 0),
Range(8, 0)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
TEST(Range, ConflictingRangesBeforeReplacements) {
std::vector<Range> Ranges = {Range(8, 3), Range(5, 4), Range(9, 1)};
Replacements Replaces = toReplacements({Replacement("foo", 1, 3, "")});
std::vector<Range> Expected = {Range(1, 0), Range(2, 6)};
EXPECT_EQ(Expected, calculateRangesAfterReplacements(Replaces, Ranges));
}
class MergeReplacementsTest : public ::testing::Test {
protected:
void mergeAndTestRewrite(StringRef Code, StringRef Intermediate,
StringRef Result, const Replacements &First,
const Replacements &Second) {
// These are mainly to verify the test itself and make it easier to read.
auto AfterFirst = applyAllReplacements(Code, First);
EXPECT_TRUE(static_cast<bool>(AfterFirst));
auto InSequenceRewrite = applyAllReplacements(*AfterFirst, Second);
EXPECT_TRUE(static_cast<bool>(InSequenceRewrite));
EXPECT_EQ(Intermediate, *AfterFirst);
EXPECT_EQ(Result, *InSequenceRewrite);
tooling::Replacements Merged = First.merge(Second);
auto MergedRewrite = applyAllReplacements(Code, Merged);
EXPECT_TRUE(static_cast<bool>(MergedRewrite));
EXPECT_EQ(*InSequenceRewrite, *MergedRewrite);
if (*InSequenceRewrite != *MergedRewrite)
for (tooling::Replacement M : Merged)
llvm::errs() << M.getOffset() << " " << M.getLength() << " "
<< M.getReplacementText() << "\n";
}
void mergeAndTestRewrite(StringRef Code, const Replacements &First,
const Replacements &Second) {
auto AfterFirst = applyAllReplacements(Code, First);
EXPECT_TRUE(static_cast<bool>(AfterFirst));
auto InSequenceRewrite = applyAllReplacements(*AfterFirst, Second);
tooling::Replacements Merged = First.merge(Second);
auto MergedRewrite = applyAllReplacements(Code, Merged);
EXPECT_TRUE(static_cast<bool>(MergedRewrite));
EXPECT_EQ(*InSequenceRewrite, *MergedRewrite);
if (*InSequenceRewrite != *MergedRewrite)
for (tooling::Replacement M : Merged)
llvm::errs() << M.getOffset() << " " << M.getLength() << " "
<< M.getReplacementText() << "\n";
}
};
TEST_F(MergeReplacementsTest, Offsets) {
mergeAndTestRewrite("aaa", "aabab", "cacabab",
toReplacements({{"", 2, 0, "b"}, {"", 3, 0, "b"}}),
toReplacements({{"", 0, 0, "c"}, {"", 1, 0, "c"}}));
mergeAndTestRewrite("aaa", "babaa", "babacac",
toReplacements({{"", 0, 0, "b"}, {"", 1, 0, "b"}}),
toReplacements({{"", 4, 0, "c"}, {"", 5, 0, "c"}}));
mergeAndTestRewrite("aaaa", "aaa", "aac", toReplacements({{"", 1, 1, ""}}),
toReplacements({{"", 2, 1, "c"}}));
mergeAndTestRewrite("aa", "bbabba", "bbabcba",
toReplacements({{"", 0, 0, "bb"}, {"", 1, 0, "bb"}}),
toReplacements({{"", 4, 0, "c"}}));
}
TEST_F(MergeReplacementsTest, Concatenations) {
// Basic concatenations. It is important to merge these into a single
// replacement to ensure the correct order.
{
auto First = toReplacements({{"", 0, 0, "a"}});
auto Second = toReplacements({{"", 1, 0, "b"}});
EXPECT_EQ(toReplacements({{"", 0, 0, "ab"}}), First.merge(Second));
}
{
auto First = toReplacements({{"", 0, 0, "a"}});
auto Second = toReplacements({{"", 0, 0, "b"}});
EXPECT_EQ(toReplacements({{"", 0, 0, "ba"}}), First.merge(Second));
}
mergeAndTestRewrite("", "a", "ab", toReplacements({{"", 0, 0, "a"}}),
toReplacements({{"", 1, 0, "b"}}));
mergeAndTestRewrite("", "a", "ba", toReplacements({{"", 0, 0, "a"}}),
toReplacements({{"", 0, 0, "b"}}));
}
TEST_F(MergeReplacementsTest, NotChangingLengths) {
mergeAndTestRewrite("aaaa", "abba", "acca",
toReplacements({{"", 1, 2, "bb"}}),
toReplacements({{"", 1, 2, "cc"}}));
mergeAndTestRewrite("aaaa", "abba", "abcc",
toReplacements({{"", 1, 2, "bb"}}),
toReplacements({{"", 2, 2, "cc"}}));
mergeAndTestRewrite("aaaa", "abba", "ccba",
toReplacements({{"", 1, 2, "bb"}}),
toReplacements({{"", 0, 2, "cc"}}));
mergeAndTestRewrite("aaaaaa", "abbdda", "abccda",
toReplacements({{"", 1, 2, "bb"}, {"", 3, 2, "dd"}}),
toReplacements({{"", 2, 2, "cc"}}));
}