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llvm-project/clang/unittests/Tooling/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 "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/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/Tooling.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Path.h"
#include "gtest/gtest.h"
namespace clang {
namespace tooling {
class ReplacementTest : public ::testing::Test {
protected:
Replacement createReplacement(SourceLocation Start, unsigned Length,
llvm::StringRef ReplacementText) {
return Replacement(Context.Sources, Start, Length, ReplacementText);
}
RewriterTestContext Context;
};
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());
}
TEST_F(ReplacementTest, CanApplyReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
Replacements Replaces;
Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
5, "replaced"));
Replaces.insert(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));
}
// FIXME: Remove this test case when Replacements is implemented as std::vector
// instead of std::set. The other ReplacementTest tests will need to be updated
// at that point as well.
TEST_F(ReplacementTest, VectorCanApplyReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
std::vector<Replacement> Replaces;
Replaces.push_back(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
5, "replaced"));
Replaces.push_back(
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));
}
TEST_F(ReplacementTest, SkipsDuplicateReplacements) {
FileID ID = Context.createInMemoryFile("input.cpp",
"line1\nline2\nline3\nline4");
Replacements Replaces;
Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
5, "replaced"));
Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
5, "replaced"));
Replaces.insert(Replacement(Context.Sources, Context.getLocation(ID, 2, 1),
5, "replaced"));
EXPECT_TRUE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("line1\nreplaced\nline3\nline4", Context.getRewrittenText(ID));
}
TEST_F(ReplacementTest, ApplyAllFailsIfOneApplyFails) {
// This test depends on the value of the file name of an invalid source
// location being in the range ]a, z[.
FileID IDa = Context.createInMemoryFile("a.cpp", "text");
FileID IDz = Context.createInMemoryFile("z.cpp", "text");
Replacements Replaces;
Replaces.insert(Replacement(Context.Sources, Context.getLocation(IDa, 1, 1),
4, "a"));
Replaces.insert(Replacement(Context.Sources, SourceLocation(),
5, "2"));
Replaces.insert(Replacement(Context.Sources, Context.getLocation(IDz, 1, 1),
4, "z"));
EXPECT_FALSE(applyAllReplacements(Replaces, Context.Rewrite));
EXPECT_EQ("a", Context.getRewrittenText(IDa));
EXPECT_EQ("z", Context.getRewrittenText(IDz));
}
TEST(ShiftedCodePositionTest, FindsNewCodePosition) {
Replacements Replaces;
Replaces.insert(Replacement("", 0, 1, ""));
Replaces.insert(Replacement("", 4, 3, " "));
// Assume ' int i;' is turned into 'int i;' and cursor is located at '|'.
EXPECT_EQ(0u, shiftedCodePosition(Replaces, 0)); // |int i;
EXPECT_EQ(0u, shiftedCodePosition(Replaces, 1)); // |nt i;
EXPECT_EQ(1u, shiftedCodePosition(Replaces, 2)); // i|t i;
EXPECT_EQ(2u, shiftedCodePosition(Replaces, 3)); // in| i;
EXPECT_EQ(3u, shiftedCodePosition(Replaces, 4)); // int| i;
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 5)); // int | i;
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 6)); // int |i;
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 7)); // int |;
EXPECT_EQ(5u, shiftedCodePosition(Replaces, 8)); // int i|
}
// FIXME: Remove this test case when Replacements is implemented as std::vector
// instead of std::set. The other ReplacementTest tests will need to be updated
// at that point as well.
TEST(ShiftedCodePositionTest, VectorFindsNewCodePositionWithInserts) {
std::vector<Replacement> Replaces;
Replaces.push_back(Replacement("", 0, 1, ""));
Replaces.push_back(Replacement("", 4, 3, " "));
// Assume ' int i;' is turned into 'int i;' and cursor is located at '|'.
EXPECT_EQ(0u, shiftedCodePosition(Replaces, 0)); // |int i;
EXPECT_EQ(0u, shiftedCodePosition(Replaces, 1)); // |nt i;
EXPECT_EQ(1u, shiftedCodePosition(Replaces, 2)); // i|t i;
EXPECT_EQ(2u, shiftedCodePosition(Replaces, 3)); // in| i;
EXPECT_EQ(3u, shiftedCodePosition(Replaces, 4)); // int| i;
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 5)); // int | i;
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 6)); // int |i;
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 7)); // int |;
EXPECT_EQ(5u, shiftedCodePosition(Replaces, 8)); // int i|
}
TEST(ShiftedCodePositionTest, FindsNewCodePositionWithInserts) {
Replacements Replaces;
Replaces.insert(Replacement("", 4, 0, "\"\n\""));
// Assume '"12345678"' is turned into '"1234"\n"5678"'.
EXPECT_EQ(4u, shiftedCodePosition(Replaces, 4)); // "123|5678"
EXPECT_EQ(8u, shiftedCodePosition(Replaces, 5)); // "1234|678"
}
class FlushRewrittenFilesTest : public ::testing::Test {
public:
FlushRewrittenFilesTest() {}
~FlushRewrittenFilesTest() {
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.GetOrCreateValue(Name, Path.str()).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.
std::unique_ptr<const llvm::MemoryBuffer> FileBuffer(
Context.Files.getBufferForFile(Path, nullptr));
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;
Replaces.insert(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;
private:
class FindConsumer : public clang::ASTConsumer {
public:
FindConsumer(TestVisitor *Visitor) : Visitor(Visitor) {}
virtual void HandleTranslationUnit(clang::ASTContext &Context) {
Visitor->TraverseDecl(Context.getTranslationUnitDecl());
}
private:
TestVisitor *Visitor;
};
class TestAction : public clang::ASTFrontendAction {
public:
TestAction(TestVisitor *Visitor) : Visitor(Visitor) {}
virtual clang::ASTConsumer* CreateASTConsumer(
clang::CompilerInstance& compiler, llvm::StringRef dummy) {
Visitor->SM = &compiler.getSourceManager();
/// TestConsumer will be deleted by the framework calling us.
return new 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);
}
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(DeduplicateTest, removesDuplicates) {
std::vector<Replacement> Input;
Input.push_back(Replacement("fileA", 50, 0, " foo "));
Input.push_back(Replacement("fileA", 10, 3, " bar "));
Input.push_back(Replacement("fileA", 10, 2, " bar ")); // Length differs
Input.push_back(Replacement("fileA", 9, 3, " bar ")); // Offset differs
Input.push_back(Replacement("fileA", 50, 0, " foo ")); // Duplicate
Input.push_back(Replacement("fileA", 51, 3, " bar "));
Input.push_back(Replacement("fileB", 51, 3, " bar ")); // Filename differs!
Input.push_back(Replacement("fileA", 51, 3, " moo ")); // Replacement text
// differs!
std::vector<Replacement> Expected;
Expected.push_back(Replacement("fileA", 9, 3, " bar "));
Expected.push_back(Replacement("fileA", 10, 2, " bar "));
Expected.push_back(Replacement("fileA", 10, 3, " bar "));
Expected.push_back(Replacement("fileA", 50, 0, " foo "));
Expected.push_back(Replacement("fileA", 51, 3, " bar "));
Expected.push_back(Replacement("fileA", 51, 3, " moo "));
Expected.push_back(Replacement("fileB", 51, 3, " bar "));
std::vector<Range> Conflicts; // Ignored for this test
deduplicate(Input, Conflicts);
ASSERT_TRUE(Expected == Input);
}
TEST(DeduplicateTest, detectsConflicts) {
{
std::vector<Replacement> Input;
Input.push_back(Replacement("fileA", 0, 5, " foo "));
Input.push_back(Replacement("fileA", 0, 5, " foo ")); // Duplicate not a
// conflict.
Input.push_back(Replacement("fileA", 2, 6, " bar "));
Input.push_back(Replacement("fileA", 7, 3, " moo "));
std::vector<Range> Conflicts;
deduplicate(Input, Conflicts);
// One duplicate is removed and the remaining three items form one
// conflicted range.
ASSERT_EQ(3u, Input.size());
ASSERT_EQ(1u, Conflicts.size());
ASSERT_EQ(0u, Conflicts.front().getOffset());
ASSERT_EQ(3u, Conflicts.front().getLength());
}
{
std::vector<Replacement> Input;
// Expected sorted order is shown. It is the sorted order to which the
// returned conflict info refers to.
Input.push_back(Replacement("fileA", 0, 5, " foo ")); // 0
Input.push_back(Replacement("fileA", 5, 5, " bar ")); // 1
Input.push_back(Replacement("fileA", 6, 0, " bar ")); // 3
Input.push_back(Replacement("fileA", 5, 5, " moo ")); // 2
Input.push_back(Replacement("fileA", 7, 2, " bar ")); // 4
Input.push_back(Replacement("fileA", 15, 5, " golf ")); // 5
Input.push_back(Replacement("fileA", 16, 5, " bag ")); // 6
Input.push_back(Replacement("fileA", 10, 3, " club ")); // 7
// #3 is special in that it is completely contained by another conflicting
// Replacement. #4 ensures #3 hasn't messed up the conflicting range size.
std::vector<Range> Conflicts;
deduplicate(Input, Conflicts);
// No duplicates
ASSERT_EQ(8u, Input.size());
ASSERT_EQ(2u, Conflicts.size());
ASSERT_EQ(1u, Conflicts[0].getOffset());
ASSERT_EQ(4u, Conflicts[0].getLength());
ASSERT_EQ(6u, Conflicts[1].getOffset());
ASSERT_EQ(2u, Conflicts[1].getLength());
}
}
} // end namespace tooling
} // end namespace clang
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