DataCollectionTest.cpp
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//===- unittests/AST/DataCollectionTest.cpp -------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file contains tests for the DataCollection module.
//
// They work by hashing the collected data of two nodes and asserting that the
// hash values are equal iff the nodes are considered equal.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/DataCollection.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Tooling/Tooling.h"
#include "gtest/gtest.h"
using namespace clang;
using namespace tooling;
using namespace ast_matchers;
namespace {
class StmtDataCollector : public ConstStmtVisitor<StmtDataCollector> {
ASTContext &Context;
llvm::MD5 &DataConsumer;
template <class T> void addData(const T &Data) {
data_collection::addDataToConsumer(DataConsumer, Data);
}
public:
StmtDataCollector(const Stmt *S, ASTContext &Context, llvm::MD5 &DataConsumer)
: Context(Context), DataConsumer(DataConsumer) {
this->Visit(S);
}
#define DEF_ADD_DATA(CLASS, CODE) \
template <class Dummy = void> Dummy Visit##CLASS(const CLASS *S) { \
CODE; \
ConstStmtVisitor<StmtDataCollector>::Visit##CLASS(S); \
}
#include "clang/AST/StmtDataCollectors.inc"
};
} // end anonymous namespace
namespace {
struct StmtHashMatch : public MatchFinder::MatchCallback {
unsigned NumFound;
llvm::MD5::MD5Result &Hash;
StmtHashMatch(llvm::MD5::MD5Result &Hash) : NumFound(0), Hash(Hash) {}
void run(const MatchFinder::MatchResult &Result) override {
const Stmt *S = Result.Nodes.getNodeAs<Stmt>("id");
if (!S)
return;
++NumFound;
if (NumFound > 1)
return;
llvm::MD5 MD5;
StmtDataCollector(S, *Result.Context, MD5);
MD5.final(Hash);
}
};
} // end anonymous namespace
static testing::AssertionResult hashStmt(llvm::MD5::MD5Result &Hash,
const StatementMatcher &StmtMatch,
StringRef Code) {
StmtHashMatch Hasher(Hash);
MatchFinder Finder;
Finder.addMatcher(StmtMatch, &Hasher);
std::unique_ptr<FrontendActionFactory> Factory(
newFrontendActionFactory(&Finder));
if (!runToolOnCode(Factory->create(), Code))
return testing::AssertionFailure()
<< "Parsing error in \"" << Code.str() << "\"";
if (Hasher.NumFound == 0)
return testing::AssertionFailure() << "Matcher didn't find any statements";
if (Hasher.NumFound > 1)
return testing::AssertionFailure()
<< "Matcher should match only one statement "
"(found "
<< Hasher.NumFound << ")";
return testing::AssertionSuccess();
}
static testing::AssertionResult
isStmtHashEqual(const StatementMatcher &StmtMatch, StringRef Code1,
StringRef Code2) {
llvm::MD5::MD5Result Hash1, Hash2;
testing::AssertionResult Result = hashStmt(Hash1, StmtMatch, Code1);
if (!Result)
return Result;
if (!(Result = hashStmt(Hash2, StmtMatch, Code2)))
return Result;
return testing::AssertionResult(Hash1 == Hash2);
}
TEST(StmtDataCollector, TestDeclRefExpr) {
ASSERT_TRUE(isStmtHashEqual(declRefExpr().bind("id"), "int x, r = x;",
"int x, r = x;"));
ASSERT_FALSE(isStmtHashEqual(declRefExpr().bind("id"), "int x, r = x;",
"int y, r = y;"));
ASSERT_FALSE(isStmtHashEqual(declRefExpr().bind("id"), "int x, r = x;",
"namespace n { int x, r = x; };"));
}
TEST(StmtDataCollector, TestMemberExpr) {
ASSERT_TRUE(isStmtHashEqual(memberExpr().bind("id"),
"struct { int x; } X; int r = X.x;",
"struct { int x; } X; int r = (&X)->x;"));
ASSERT_TRUE(isStmtHashEqual(memberExpr().bind("id"),
"struct { int x; } X; int r = X.x;",
"struct { int x; } Y; int r = Y.x;"));
ASSERT_TRUE(isStmtHashEqual(memberExpr().bind("id"),
"struct { int x; } X; int r = X.x;",
"struct C { int x; } X; int r = X.C::x;"));
ASSERT_FALSE(isStmtHashEqual(memberExpr().bind("id"),
"struct { int x; } X; int r = X.x;",
"struct { int y; } X; int r = X.y;"));
}
TEST(StmtDataCollector, TestIntegerLiteral) {
ASSERT_TRUE(
isStmtHashEqual(integerLiteral().bind("id"), "int x = 0;", "int x = 0;"));
ASSERT_TRUE(
isStmtHashEqual(integerLiteral().bind("id"), "int x = 0;", "int x =00;"));
ASSERT_FALSE(
isStmtHashEqual(integerLiteral().bind("id"), "int x = 0;", "int x = 1;"));
}
TEST(StmtDataCollector, TestFloatingLiteral) {
ASSERT_TRUE(isStmtHashEqual(floatLiteral().bind("id"), "double x = .0;",
"double x = .0;"));
ASSERT_TRUE(isStmtHashEqual(floatLiteral().bind("id"), "double x = .10;",
"double x = .1;"));
ASSERT_TRUE(isStmtHashEqual(floatLiteral().bind("id"), "double x = .1;",
"double x = 1e-1;"));
ASSERT_FALSE(isStmtHashEqual(floatLiteral().bind("id"), "double x = .0;",
"double x = .1;"));
}
TEST(StmtDataCollector, TestStringLiteral) {
ASSERT_TRUE(isStmtHashEqual(stringLiteral().bind("id"), R"(char x[] = "0";)",
R"(char x[] = "0";)"));
ASSERT_FALSE(isStmtHashEqual(stringLiteral().bind("id"), R"(char x[] = "0";)",
R"(char x[] = "1";)"));
}
TEST(StmtDataCollector, TestCXXBoolLiteral) {
ASSERT_TRUE(isStmtHashEqual(cxxBoolLiteral().bind("id"), "bool x = false;",
"bool x = false;"));
ASSERT_FALSE(isStmtHashEqual(cxxBoolLiteral().bind("id"), "bool x = false;",
"bool x = true;"));
}
TEST(StmtDataCollector, TestCharacterLiteral) {
ASSERT_TRUE(isStmtHashEqual(characterLiteral().bind("id"), "char x = '0';",
"char x = '0';"));
ASSERT_TRUE(isStmtHashEqual(characterLiteral().bind("id"),
R"(char x = '\0';)",
R"(char x = '\x00';)"));
ASSERT_FALSE(isStmtHashEqual(characterLiteral().bind("id"), "char x = '0';",
"char x = '1';"));
}