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//===- unittest/Tooling/CommentHandlerTest.cpp -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "TestVisitor.h"
#include "clang/Lex/Preprocessor.h"
namespace clang {
struct Comment {
Comment(const std::string &Message, unsigned Line, unsigned Col)
: Message(Message), Line(Line), Col(Col) { }
std::string Message;
unsigned Line, Col;
};
class CommentVerifier;
typedef std::vector<Comment> CommentList;
class CommentHandlerVisitor : public TestVisitor<CommentHandlerVisitor>,
public CommentHandler {
typedef TestVisitor<CommentHandlerVisitor> base;
public:
CommentHandlerVisitor() : base(), PP(0), Verified(false) { }
~CommentHandlerVisitor() {
EXPECT_TRUE(Verified) << "CommentVerifier not accessed";
}
virtual bool HandleComment(Preprocessor &PP, SourceRange Loc) {
assert(&PP == this->PP && "Preprocessor changed!");
SourceLocation Start = Loc.getBegin();
SourceManager &SM = PP.getSourceManager();
std::string C(SM.getCharacterData(Start),
SM.getCharacterData(Loc.getEnd()));
bool Invalid;
unsigned CLine = SM.getSpellingLineNumber(Start, &Invalid);
EXPECT_TRUE(!Invalid) << "Invalid line number on comment " << C;
unsigned CCol = SM.getSpellingColumnNumber(Start, &Invalid);
EXPECT_TRUE(!Invalid) << "Invalid column number on comment " << C;
Comments.push_back(Comment(C, CLine, CCol));
return false;
}
CommentVerifier GetVerifier();
protected:
virtual ASTFrontendAction* CreateTestAction() {
return new CommentHandlerAction(this);
}
private:
Preprocessor *PP;
CommentList Comments;
bool Verified;
class CommentHandlerAction : public base::TestAction {
public:
CommentHandlerAction(CommentHandlerVisitor *Visitor)
: TestAction(Visitor) { }
virtual bool BeginSourceFileAction(CompilerInstance &CI,
StringRef FileName) {
CommentHandlerVisitor *V =
static_cast<CommentHandlerVisitor*>(this->Visitor);
V->PP = &CI.getPreprocessor();
V->PP->addCommentHandler(V);
return true;
}
virtual void EndSourceFileAction() {
CommentHandlerVisitor *V =
static_cast<CommentHandlerVisitor*>(this->Visitor);
V->PP->removeCommentHandler(V);
}
};
};
class CommentVerifier {
CommentList::const_iterator Current;
CommentList::const_iterator End;
Preprocessor *PP;
public:
CommentVerifier(const CommentList &Comments, Preprocessor *PP)
: Current(Comments.begin()), End(Comments.end()), PP(PP)
{ }
~CommentVerifier() {
if (Current != End) {
EXPECT_TRUE(Current == End) << "Unexpected comment \""
<< Current->Message << "\" at line " << Current->Line << ", column "
<< Current->Col;
}
}
void Match(const char *Message, unsigned Line, unsigned Col) {
EXPECT_TRUE(Current != End) << "Comment " << Message << " not found";
if (Current == End) return;
const Comment &C = *Current;
EXPECT_TRUE(C.Message == Message && C.Line == Line && C.Col == Col)
<< "Expected comment \"" << Message
<< "\" at line " << Line << ", column " << Col
<< "\nActual comment \"" << C.Message
<< "\" at line " << C.Line << ", column " << C.Col;
++Current;
}
};
CommentVerifier CommentHandlerVisitor::GetVerifier() {
Verified = true;
return CommentVerifier(Comments, PP);
}
TEST(CommentHandlerTest, BasicTest1) {
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver("class X {}; int main() { return 0; }"));
CommentVerifier Verifier = Visitor.GetVerifier();
}
TEST(CommentHandlerTest, BasicTest2) {
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver(
"class X {}; int main() { /* comment */ return 0; }"));
CommentVerifier Verifier = Visitor.GetVerifier();
Verifier.Match("/* comment */", 1, 26);
}
TEST(CommentHandlerTest, BasicTest3) {
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver(
"class X {}; // comment 1\n"
"int main() {\n"
" // comment 2\n"
" return 0;\n"
"}"));
CommentVerifier Verifier = Visitor.GetVerifier();
Verifier.Match("// comment 1", 1, 13);
Verifier.Match("// comment 2", 3, 3);
}
TEST(CommentHandlerTest, IfBlock1) {
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver(
"#if 0\n"
"// ignored comment\n"
"#endif\n"
"// visible comment\n"));
CommentVerifier Verifier = Visitor.GetVerifier();
Verifier.Match("// visible comment", 4, 1);
}
TEST(CommentHandlerTest, IfBlock2) {
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver(
"#define TEST // visible_1\n"
"#ifndef TEST // visible_2\n"
" // ignored_3\n"
"# ifdef UNDEFINED // ignored_4\n"
"# endif // ignored_5\n"
"#elif defined(TEST) // visible_6\n"
"# if 1 // visible_7\n"
" // visible_8\n"
"# else // visible_9\n"
" // ignored_10\n"
"# ifndef TEST // ignored_11\n"
"# endif // ignored_12\n"
"# endif // visible_13\n"
"#endif // visible_14\n"));
CommentVerifier Verifier = Visitor.GetVerifier();
Verifier.Match("// visible_1", 1, 21);
Verifier.Match("// visible_2", 2, 21);
Verifier.Match("// visible_6", 6, 21);
Verifier.Match("// visible_7", 7, 21);
Verifier.Match("// visible_8", 8, 21);
Verifier.Match("// visible_9", 9, 21);
Verifier.Match("// visible_13", 13, 21);
Verifier.Match("// visible_14", 14, 21);
}
TEST(CommentHandlerTest, IfBlock3) {
const char *Source =
"/* commented out ...\n"
"#if 0\n"
"// enclosed\n"
"#endif */";
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver(Source));
CommentVerifier Verifier = Visitor.GetVerifier();
Verifier.Match(Source, 1, 1);
}
TEST(CommentHandlerTest, PPDirectives) {
CommentHandlerVisitor Visitor;
EXPECT_TRUE(Visitor.runOver(
"#warning Y // ignored_1\n" // #warning takes whole line as message
"#undef MACRO // visible_2\n"
"#line 1 // visible_3\n"));
CommentVerifier Verifier = Visitor.GetVerifier();
Verifier.Match("// visible_2", 2, 14);
Verifier.Match("// visible_3", 3, 14);
}
} // end namespace clang
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