llvm-6502/unittests/ADT/SmallVectorTest.cpp
Daniel Dunbar 614be08dd6 Clarify a FIXME.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75422 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-12 19:45:34 +00:00

385 lines
9.4 KiB
C++

//===- llvm/unittest/ADT/SmallVectorTest.cpp ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// SmallVector unit tests.
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "llvm/ADT/SmallVector.h"
#include <stdarg.h>
using namespace llvm;
namespace {
/// A helper class that counts the total number of constructor and
/// destructor calls.
class Constructable {
private:
static int numConstructorCalls;
static int numDestructorCalls;
static int numAssignmentCalls;
int value;
public:
Constructable() : value(0) {
++numConstructorCalls;
}
Constructable(int val) : value(val) {
++numConstructorCalls;
}
Constructable(const Constructable & src) {
value = src.value;
++numConstructorCalls;
}
~Constructable() {
++numDestructorCalls;
}
Constructable & operator=(const Constructable & src) {
value = src.value;
++numAssignmentCalls;
return *this;
}
int getValue() const {
return abs(value);
}
static void reset() {
numConstructorCalls = 0;
numDestructorCalls = 0;
numAssignmentCalls = 0;
}
static int getNumConstructorCalls() {
return numConstructorCalls;
}
static int getNumDestructorCalls() {
return numDestructorCalls;
}
friend bool operator==(const Constructable & c0, const Constructable & c1) {
return c0.getValue() == c1.getValue();
}
friend bool operator!=(const Constructable & c0, const Constructable & c1) {
return c0.getValue() != c1.getValue();
}
};
int Constructable::numConstructorCalls;
int Constructable::numDestructorCalls;
int Constructable::numAssignmentCalls;
// Test fixture class
class SmallVectorTest : public testing::Test {
protected:
typedef SmallVector<Constructable, 4> VectorType;
VectorType theVector;
VectorType otherVector;
void SetUp() {
Constructable::reset();
}
void assertEmpty(VectorType & v) {
// Size tests
EXPECT_EQ(0u, v.size());
EXPECT_TRUE(v.empty());
// Iterator tests
EXPECT_TRUE(v.begin() == v.end());
}
// Assert that theVector contains the specified values, in order.
void assertValuesInOrder(VectorType & v, size_t size, ...) {
EXPECT_EQ(size, v.size());
va_list ap;
va_start(ap, size);
for (size_t i = 0; i < size; ++i) {
int value = va_arg(ap, int);
EXPECT_EQ(value, v[i].getValue());
}
va_end(ap);
}
// Generate a sequence of values to initialize the vector.
void makeSequence(VectorType & v, int start, int end) {
for (int i = start; i <= end; ++i) {
v.push_back(Constructable(i));
}
}
};
// New vector test.
TEST_F(SmallVectorTest, EmptyVectorTest) {
SCOPED_TRACE("EmptyVectorTest");
assertEmpty(theVector);
EXPECT_TRUE(theVector.rbegin() == theVector.rend());
EXPECT_EQ(0, Constructable::getNumConstructorCalls());
EXPECT_EQ(0, Constructable::getNumDestructorCalls());
}
// Simple insertions and deletions.
TEST_F(SmallVectorTest, PushPopTest) {
SCOPED_TRACE("PushPopTest");
// Push an element
theVector.push_back(Constructable(1));
// Size tests
assertValuesInOrder(theVector, 1u, 1);
EXPECT_FALSE(theVector.begin() == theVector.end());
EXPECT_FALSE(theVector.empty());
// Push another element
theVector.push_back(Constructable(2));
assertValuesInOrder(theVector, 2u, 1, 2);
// Pop one element
theVector.pop_back();
assertValuesInOrder(theVector, 1u, 1);
// Pop another element
theVector.pop_back();
assertEmpty(theVector);
// Check number of constructor calls. Should be 2 for each list element,
// one for the argument to push_back, and one for the list element itself.
EXPECT_EQ(4, Constructable::getNumConstructorCalls());
EXPECT_EQ(4, Constructable::getNumDestructorCalls());
}
// Clear test.
TEST_F(SmallVectorTest, ClearTest) {
SCOPED_TRACE("ClearTest");
makeSequence(theVector, 1, 2);
theVector.clear();
assertEmpty(theVector);
EXPECT_EQ(4, Constructable::getNumConstructorCalls());
EXPECT_EQ(4, Constructable::getNumDestructorCalls());
}
// Resize smaller test.
TEST_F(SmallVectorTest, ResizeShrinkTest) {
SCOPED_TRACE("ResizeShrinkTest");
makeSequence(theVector, 1, 3);
theVector.resize(1);
assertValuesInOrder(theVector, 1u, 1);
EXPECT_EQ(6, Constructable::getNumConstructorCalls());
EXPECT_EQ(5, Constructable::getNumDestructorCalls());
}
// Resize bigger test.
TEST_F(SmallVectorTest, ResizeGrowTest) {
SCOPED_TRACE("ResizeGrowTest");
theVector.resize(2);
// The extra constructor/destructor calls come from the temporary object used
// to initialize the contents of the resized array (via copy construction).
EXPECT_EQ(3, Constructable::getNumConstructorCalls());
EXPECT_EQ(1, Constructable::getNumDestructorCalls());
EXPECT_EQ(2u, theVector.size());
}
// Resize with fill value.
TEST_F(SmallVectorTest, ResizeFillTest) {
SCOPED_TRACE("ResizeFillTest");
theVector.resize(3, Constructable(77));
assertValuesInOrder(theVector, 3u, 77, 77, 77);
}
// Overflow past fixed size.
TEST_F(SmallVectorTest, OverflowTest) {
SCOPED_TRACE("OverflowTest");
// Push more elements than the fixed size.
makeSequence(theVector, 1, 10);
// Test size and values.
EXPECT_EQ(10u, theVector.size());
for (int i = 0; i < 10; ++i) {
EXPECT_EQ(i+1, theVector[i].getValue());
}
// Now resize back to fixed size.
theVector.resize(1);
assertValuesInOrder(theVector, 1u, 1);
}
// Iteration tests.
TEST_F(SmallVectorTest, IterationTest) {
makeSequence(theVector, 1, 2);
// Forward Iteration
VectorType::iterator it = theVector.begin();
EXPECT_TRUE(*it == theVector.front());
EXPECT_TRUE(*it == theVector[0]);
EXPECT_EQ(1, it->getValue());
++it;
EXPECT_TRUE(*it == theVector[1]);
EXPECT_TRUE(*it == theVector.back());
EXPECT_EQ(2, it->getValue());
++it;
EXPECT_TRUE(it == theVector.end());
--it;
EXPECT_TRUE(*it == theVector[1]);
EXPECT_EQ(2, it->getValue());
--it;
EXPECT_TRUE(*it == theVector[0]);
EXPECT_EQ(1, it->getValue());
// Reverse Iteration
VectorType::reverse_iterator rit = theVector.rbegin();
EXPECT_TRUE(*rit == theVector[1]);
EXPECT_EQ(2, rit->getValue());
++rit;
EXPECT_TRUE(*rit == theVector[0]);
EXPECT_EQ(1, rit->getValue());
++rit;
EXPECT_TRUE(rit == theVector.rend());
--rit;
EXPECT_TRUE(*rit == theVector[0]);
EXPECT_EQ(1, rit->getValue());
--rit;
EXPECT_TRUE(*rit == theVector[1]);
EXPECT_EQ(2, rit->getValue());
}
// Swap test.
TEST_F(SmallVectorTest, SwapTest) {
SCOPED_TRACE("SwapTest");
makeSequence(theVector, 1, 2);
std::swap(theVector, otherVector);
assertEmpty(theVector);
assertValuesInOrder(otherVector, 2u, 1, 2);
}
// Append test
TEST_F(SmallVectorTest, AppendTest) {
SCOPED_TRACE("AppendTest");
makeSequence(otherVector, 2, 3);
theVector.push_back(Constructable(1));
theVector.append(otherVector.begin(), otherVector.end());
assertValuesInOrder(theVector, 3u, 1, 2, 3);
}
// Append repeated test
TEST_F(SmallVectorTest, AppendRepeatedTest) {
SCOPED_TRACE("AppendRepeatedTest");
theVector.push_back(Constructable(1));
theVector.append(2, Constructable(77));
assertValuesInOrder(theVector, 3u, 1, 77, 77);
}
// Assign test
TEST_F(SmallVectorTest, AssignTest) {
SCOPED_TRACE("AssignTest");
theVector.push_back(Constructable(1));
theVector.assign(2, Constructable(77));
assertValuesInOrder(theVector, 2u, 77, 77);
}
// Erase a single element
TEST_F(SmallVectorTest, EraseTest) {
SCOPED_TRACE("EraseTest");
makeSequence(theVector, 1, 3);
theVector.erase(theVector.begin());
assertValuesInOrder(theVector, 2u, 2, 3);
}
// Erase a range of elements
TEST_F(SmallVectorTest, EraseRangeTest) {
SCOPED_TRACE("EraseRangeTest");
makeSequence(theVector, 1, 3);
theVector.erase(theVector.begin(), theVector.begin() + 2);
assertValuesInOrder(theVector, 1u, 3);
}
// Insert a single element.
TEST_F(SmallVectorTest, InsertTest) {
SCOPED_TRACE("InsertTest");
makeSequence(theVector, 1, 3);
theVector.insert(theVector.begin() + 1, Constructable(77));
assertValuesInOrder(theVector, 4u, 1, 77, 2, 3);
}
// Insert repeated elements.
TEST_F(SmallVectorTest, InsertRepeatedTest) {
SCOPED_TRACE("InsertRepeatedTest");
makeSequence(theVector, 10, 15);
theVector.insert(theVector.begin() + 1, 2, Constructable(16));
assertValuesInOrder(theVector, 8u, 10, 16, 16, 11, 12, 13, 14, 15);
}
// Insert range.
TEST_F(SmallVectorTest, InsertRangeTest) {
SCOPED_TRACE("InsertRepeatedTest");
makeSequence(theVector, 1, 3);
theVector.insert(theVector.begin() + 1, 3, Constructable(77));
assertValuesInOrder(theVector, 6u, 1, 77, 77, 77, 2, 3);
}
// Comparison tests.
TEST_F(SmallVectorTest, ComparisonTest) {
SCOPED_TRACE("ComparisonTest");
makeSequence(theVector, 1, 3);
makeSequence(otherVector, 1, 3);
EXPECT_TRUE(theVector == otherVector);
EXPECT_FALSE(theVector != otherVector);
otherVector.clear();
makeSequence(otherVector, 2, 4);
EXPECT_FALSE(theVector == otherVector);
EXPECT_TRUE(theVector != otherVector);
}
// Constant vector tests.
TEST_F(SmallVectorTest, ConstVectorTest) {
const VectorType constVector;
EXPECT_EQ(0u, constVector.size());
EXPECT_TRUE(constVector.empty());
EXPECT_TRUE(constVector.begin() == constVector.end());
}
}