forked from OSchip/llvm-project
350 lines
13 KiB
C++
350 lines
13 KiB
C++
//===- unittests/StaticAnalyzer/RangeSetTest.cpp ----------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/Builtins.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/RangedConstraintManager.h"
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#include "clang/Tooling/Tooling.h"
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#include "llvm/ADT/APSInt.h"
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#include "llvm/Support/raw_ostream.h"
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#include "gtest/gtest.h"
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using namespace clang;
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using namespace ento;
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namespace clang {
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namespace ento {
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template <class RangeOrSet> static std::string toString(const RangeOrSet &Obj) {
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std::string ObjRepresentation;
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llvm::raw_string_ostream SS(ObjRepresentation);
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Obj.dump(SS);
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return SS.str();
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}
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LLVM_ATTRIBUTE_UNUSED static std::string toString(const llvm::APSInt &Point) {
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return Point.toString(10);
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}
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// We need it here for better fail diagnostics from gtest.
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LLVM_ATTRIBUTE_UNUSED static std::ostream &operator<<(std::ostream &OS,
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const RangeSet &Set) {
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return OS << toString(Set);
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}
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} // namespace ento
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} // namespace clang
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namespace {
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template <typename BaseType> class RangeSetTest : public testing::Test {
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public:
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// Init block
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std::unique_ptr<ASTUnit> AST = tooling::buildASTFromCode("struct foo;");
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ASTContext &Context = AST->getASTContext();
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llvm::BumpPtrAllocator Arena;
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BasicValueFactory BVF{Context, Arena};
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RangeSet::Factory F{BVF};
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// End init block
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using Self = RangeSetTest<BaseType>;
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using RawRange = std::pair<BaseType, BaseType>;
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using RawRangeSet = std::initializer_list<RawRange>;
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static constexpr BaseType getMin() {
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return std::numeric_limits<BaseType>::min();
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}
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static constexpr BaseType getMax() {
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return std::numeric_limits<BaseType>::max();
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}
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static constexpr BaseType getMid() {
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return isSigned() ? 0 : ~(fromInt(-1) / fromInt(2));
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}
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static constexpr bool isSigned() { return std::is_signed<BaseType>::value; }
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static constexpr BaseType fromInt(int X) { return static_cast<BaseType>(X); }
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static llvm::APSInt Base;
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const llvm::APSInt &from(BaseType X) {
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llvm::APSInt Dummy = Base;
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Dummy = X;
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return BVF.getValue(Dummy);
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}
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Range from(const RawRange &Init) {
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return Range(from(Init.first), from(Init.second));
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}
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RangeSet from(const RawRangeSet &Init) {
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RangeSet RangeSet = F.getEmptySet();
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for (const auto &Raw : Init) {
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RangeSet = F.add(RangeSet, from(Raw));
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}
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return RangeSet;
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}
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template <class F, class... RawArgTypes>
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void wrap(F ActualFunction, RawArgTypes &&... Args) {
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(this->*ActualFunction)(from(std::forward<RawArgTypes>(Args))...);
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}
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void checkNegateImpl(RangeSet Original, RangeSet Expected) {
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RangeSet NegatedFromOriginal = F.negate(Original);
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EXPECT_EQ(NegatedFromOriginal, Expected);
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// Negate negated back and check with original.
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RangeSet NegatedBackward = F.negate(NegatedFromOriginal);
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EXPECT_EQ(NegatedBackward, Original);
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}
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void checkNegate(RawRangeSet RawOriginal, RawRangeSet RawExpected) {
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wrap(&Self::checkNegateImpl, RawOriginal, RawExpected);
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}
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template <class PointOrSet>
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void checkIntersectImpl(RangeSet LHS, PointOrSet RHS, RangeSet Expected) {
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RangeSet Result = F.intersect(LHS, RHS);
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EXPECT_EQ(Result, Expected)
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<< "while intersecting " << toString(LHS) << " and " << toString(RHS);
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}
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void checkIntersectRangeImpl(RangeSet LHS, const llvm::APSInt &Lower,
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const llvm::APSInt &Upper, RangeSet Expected) {
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RangeSet Result = F.intersect(LHS, Lower, Upper);
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EXPECT_EQ(Result, Expected)
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<< "while intersecting " << toString(LHS) << " and [" << toString(Lower)
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<< ", " << toString(Upper) << "]";
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}
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void checkIntersect(RawRangeSet RawLHS, RawRangeSet RawRHS,
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RawRangeSet RawExpected) {
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wrap(&Self::checkIntersectImpl<RangeSet>, RawLHS, RawRHS, RawExpected);
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}
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void checkIntersect(RawRangeSet RawLHS, BaseType RawRHS,
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RawRangeSet RawExpected) {
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wrap(&Self::checkIntersectImpl<const llvm::APSInt &>, RawLHS, RawRHS,
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RawExpected);
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}
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void checkIntersect(RawRangeSet RawLHS, BaseType RawLower, BaseType RawUpper,
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RawRangeSet RawExpected) {
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wrap(&Self::checkIntersectRangeImpl, RawLHS, RawLower, RawUpper,
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RawExpected);
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}
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void checkContainsImpl(RangeSet LHS, const llvm::APSInt &RHS, bool Expected) {
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bool Result = LHS.contains(RHS);
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EXPECT_EQ(Result, Expected)
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<< toString(LHS) << (Result ? " contains " : " doesn't contain ")
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<< toString(RHS);
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}
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void checkContains(RawRangeSet RawLHS, BaseType RawRHS, bool Expected) {
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checkContainsImpl(from(RawLHS), from(RawRHS), Expected);
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}
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template <class RHSType>
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void checkAddImpl(RangeSet LHS, RHSType RHS, RangeSet Expected) {
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RangeSet Result = F.add(LHS, RHS);
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EXPECT_EQ(Result, Expected)
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<< "while adding " << toString(LHS) << " and " << toString(RHS);
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}
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void checkAdd(RawRangeSet RawLHS, RawRange RawRHS, RawRangeSet RawExpected) {
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wrap(&Self::checkAddImpl<Range>, RawLHS, RawRHS, RawExpected);
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}
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void checkAdd(RawRangeSet RawLHS, RawRangeSet RawRHS,
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RawRangeSet RawExpected) {
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wrap(&Self::checkAddImpl<RangeSet>, RawRHS, RawLHS, RawExpected);
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}
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void checkAdd(RawRangeSet RawLHS, BaseType RawRHS, RawRangeSet RawExpected) {
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wrap(&Self::checkAddImpl<const llvm::APSInt &>, RawLHS, RawRHS,
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RawExpected);
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}
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void checkDeleteImpl(const llvm::APSInt &Point, RangeSet From,
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RangeSet Expected) {
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RangeSet Result = F.deletePoint(From, Point);
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EXPECT_EQ(Result, Expected)
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<< "while deleting " << toString(Point) << " from " << toString(From);
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}
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void checkDelete(BaseType Point, RawRangeSet RawFrom,
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RawRangeSet RawExpected) {
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wrap(&Self::checkDeleteImpl, Point, RawFrom, RawExpected);
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}
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};
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} // namespace
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template <typename BaseType>
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llvm::APSInt RangeSetTest<BaseType>::Base{sizeof(BaseType) * 8, !isSigned()};
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using IntTypes = ::testing::Types<int8_t, uint8_t, int16_t, uint16_t, int32_t,
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uint32_t, int64_t, uint64_t>;
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TYPED_TEST_CASE(RangeSetTest, IntTypes);
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TYPED_TEST(RangeSetTest, RangeSetNegateTest) {
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// Use next values of the range {MIN, A, B, MID, C, D, MAX}.
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constexpr TypeParam MIN = TestFixture::getMin();
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constexpr TypeParam MAX = TestFixture::getMax();
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// MID is a value in the middle of the range
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// which unary minus does not affect on,
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// e.g. int8/int32(0), uint8(128), uint32(2147483648).
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constexpr TypeParam MID = TestFixture::getMid();
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constexpr TypeParam A = MID - TestFixture::fromInt(42 + 42);
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constexpr TypeParam B = MID - TestFixture::fromInt(42);
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constexpr TypeParam C = -B;
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constexpr TypeParam D = -A;
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static_assert(MIN < A && A < B && B < MID && MID < C && C < D && D < MAX,
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"Values shall be in an ascending order");
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this->checkNegate({{MIN, A}}, {{MIN, MIN}, {D, MAX}});
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this->checkNegate({{MIN, C}}, {{MIN, MIN}, {B, MAX}});
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this->checkNegate({{MIN, MID}}, {{MIN, MIN}, {MID, MAX}});
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this->checkNegate({{MIN, MAX}}, {{MIN, MAX}});
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this->checkNegate({{A, D}}, {{A, D}});
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this->checkNegate({{A, B}}, {{C, D}});
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this->checkNegate({{MIN, A}, {D, MAX}}, {{MIN, A}, {D, MAX}});
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this->checkNegate({{MIN, B}, {MID, D}}, {{MIN, MIN}, {A, MID}, {C, MAX}});
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this->checkNegate({{MIN, MID}, {C, D}}, {{MIN, MIN}, {A, B}, {MID, MAX}});
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this->checkNegate({{MIN, MID}, {C, MAX}}, {{MIN, B}, {MID, MAX}});
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this->checkNegate({{A, MID}, {D, MAX}}, {{MIN + 1, A}, {MID, D}});
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this->checkNegate({{A, A}}, {{D, D}});
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this->checkNegate({{MID, MID}}, {{MID, MID}});
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this->checkNegate({{MAX, MAX}}, {{MIN + 1, MIN + 1}});
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}
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TYPED_TEST(RangeSetTest, RangeSetPointIntersectTest) {
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// Check that we can correctly intersect empty sets.
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this->checkIntersect({}, 42, {});
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// Check that intersection with itself produces the same set.
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this->checkIntersect({{42, 42}}, 42, {{42, 42}});
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// Check more general cases.
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this->checkIntersect({{0, 10}, {20, 30}, {30, 40}, {50, 60}}, 42, {});
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this->checkIntersect({{0, 10}, {20, 30}, {30, 60}}, 42, {{42, 42}});
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}
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TYPED_TEST(RangeSetTest, RangeSetRangeIntersectTest) {
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constexpr TypeParam MIN = TestFixture::getMin();
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constexpr TypeParam MAX = TestFixture::getMax();
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// Check that we can correctly intersect empty sets.
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this->checkIntersect({}, 10, 20, {});
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this->checkIntersect({}, 20, 10, {});
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// Check that intersection with itself produces the same set.
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this->checkIntersect({{10, 20}}, 10, 20, {{10, 20}});
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this->checkIntersect({{MIN, 10}, {20, MAX}}, 20, 10, {{MIN, 10}, {20, MAX}});
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// Check non-overlapping range intersections.
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this->checkIntersect({{10, 20}}, 21, 9, {});
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this->checkIntersect({{MIN, 9}, {21, MAX}}, 10, 20, {});
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// Check more general cases.
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this->checkIntersect({{0, 10}, {20, 30}, {30, 40}, {50, 60}}, 10, 35,
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{{10, 10}, {20, 30}, {30, 35}});
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this->checkIntersect({{0, 10}, {20, 30}, {30, 40}, {50, 60}}, 35, 10,
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{{0, 10}, {35, 40}, {50, 60}});
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}
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TYPED_TEST(RangeSetTest, RangeSetGenericIntersectTest) {
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// Check that we can correctly intersect empty sets.
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this->checkIntersect({}, {}, {});
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this->checkIntersect({}, {{0, 10}}, {});
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this->checkIntersect({{0, 10}}, {}, {});
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this->checkIntersect({{0, 10}}, {{4, 6}}, {{4, 6}});
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this->checkIntersect({{0, 10}}, {{4, 20}}, {{4, 10}});
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// Check that intersection with points works as expected.
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this->checkIntersect({{0, 10}}, {{4, 4}}, {{4, 4}});
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// All ranges are closed, check that intersection with edge points works as
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// expected.
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this->checkIntersect({{0, 10}}, {{10, 10}}, {{10, 10}});
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// Let's check that we can skip some intervals and partially intersect
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// other intervals.
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this->checkIntersect({{0, 2}, {4, 5}, {6, 9}, {10, 11}, {12, 12}, {13, 15}},
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{{8, 14}, {20, 30}},
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{{8, 9}, {10, 11}, {12, 12}, {13, 14}});
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// Check more generic case.
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this->checkIntersect(
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{{0, 1}, {2, 3}, {5, 6}, {7, 15}, {25, 30}},
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{{4, 10}, {11, 11}, {12, 16}, {17, 17}, {19, 20}, {21, 23}, {24, 27}},
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{{5, 6}, {7, 10}, {11, 11}, {12, 15}, {25, 27}});
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}
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TYPED_TEST(RangeSetTest, RangeSetContainsTest) {
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// Check with an empty set.
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this->checkContains({}, 10, false);
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// Check contains with sets of size one:
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// * when the whole range is less
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this->checkContains({{0, 5}}, 10, false);
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// * when the whole range is greater
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this->checkContains({{20, 25}}, 10, false);
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// * when the range is just the point we are looking for
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this->checkContains({{10, 10}}, 10, true);
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// * when the range starts with the point
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this->checkContains({{10, 15}}, 10, true);
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// * when the range ends with the point
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this->checkContains({{5, 10}}, 10, true);
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// * when the range has the point somewhere in the middle
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this->checkContains({{0, 25}}, 10, true);
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// Check similar cases, but with larger sets.
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this->checkContains({{0, 5}, {10, 10}, {15, 20}}, 10, true);
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this->checkContains({{0, 5}, {10, 12}, {15, 20}}, 10, true);
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this->checkContains({{0, 5}, {5, 7}, {8, 10}, {12, 41}}, 10, true);
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constexpr TypeParam MIN = TestFixture::getMin();
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constexpr TypeParam MAX = TestFixture::getMax();
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constexpr TypeParam MID = TestFixture::getMid();
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this->checkContains({{MIN, MAX}}, 0, true);
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this->checkContains({{MIN, MAX}}, MID, true);
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this->checkContains({{MIN, MAX}}, -10, true);
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this->checkContains({{MIN, MAX}}, 10, true);
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}
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TYPED_TEST(RangeSetTest, RangeSetAddTest) {
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// Check adding single points
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this->checkAdd({}, 10, {{10, 10}});
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this->checkAdd({{0, 5}}, 10, {{0, 5}, {10, 10}});
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this->checkAdd({{0, 5}, {30, 40}}, 10, {{0, 5}, {10, 10}, {30, 40}});
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// Check adding single ranges.
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this->checkAdd({}, {10, 20}, {{10, 20}});
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this->checkAdd({{0, 5}}, {10, 20}, {{0, 5}, {10, 20}});
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this->checkAdd({{0, 5}, {30, 40}}, {10, 20}, {{0, 5}, {10, 20}, {30, 40}});
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// Check adding whole sets of ranges.
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this->checkAdd({{0, 5}}, {{10, 20}}, {{0, 5}, {10, 20}});
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// Check that ordering of ranges is as expected.
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this->checkAdd({{0, 5}, {30, 40}}, {{10, 20}}, {{0, 5}, {10, 20}, {30, 40}});
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this->checkAdd({{0, 5}, {30, 40}}, {{10, 20}, {50, 60}},
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{{0, 5}, {10, 20}, {30, 40}, {50, 60}});
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this->checkAdd({{10, 20}, {50, 60}}, {{0, 5}, {30, 40}, {70, 80}},
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{{0, 5}, {10, 20}, {30, 40}, {50, 60}, {70, 80}});
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}
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TYPED_TEST(RangeSetTest, RangeSetDeletePointTest) {
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constexpr TypeParam MIN = TestFixture::getMin();
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constexpr TypeParam MAX = TestFixture::getMax();
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constexpr TypeParam MID = TestFixture::getMid();
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this->checkDelete(MID, {{MIN, MAX}}, {{MIN, MID - 1}, {MID + 1, MAX}});
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// Check that delete works with an empty set.
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this->checkDelete(10, {}, {});
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// Check that delete can remove entire ranges.
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this->checkDelete(10, {{10, 10}}, {});
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this->checkDelete(10, {{0, 5}, {10, 10}, {20, 30}}, {{0, 5}, {20, 30}});
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// Check that delete can split existing ranges into two.
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this->checkDelete(10, {{0, 5}, {7, 15}, {20, 30}},
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{{0, 5}, {7, 9}, {11, 15}, {20, 30}});
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// Check that delete of the point not from the range set works as expected.
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this->checkDelete(10, {{0, 5}, {20, 30}}, {{0, 5}, {20, 30}});
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}
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