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//===- llvm/unittest/ADT/APInt.cpp - APInt unit tests ---------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/ilist_node.h"
#include "gtest/gtest.h"
#include <ostream>
using namespace llvm;
namespace {
struct Node : ilist_node<Node> {
int Value;
Node() {}
Node(int Value) : Value(Value) {}
Node(const Node&) = default;
~Node() { Value = -1; }
};
TEST(ilistTest, Basic) {
ilist<Node> List;
List.push_back(Node(1));
EXPECT_EQ(1, List.back().Value);
EXPECT_EQ(nullptr, List.back().getPrevNode());
EXPECT_EQ(nullptr, List.back().getNextNode());
List.push_back(Node(2));
EXPECT_EQ(2, List.back().Value);
EXPECT_EQ(2, List.front().getNextNode()->Value);
EXPECT_EQ(1, List.back().getPrevNode()->Value);
const ilist<Node> &ConstList = List;
EXPECT_EQ(2, ConstList.back().Value);
EXPECT_EQ(2, ConstList.front().getNextNode()->Value);
EXPECT_EQ(1, ConstList.back().getPrevNode()->Value);
}
TEST(ilistTest, SpliceOne) {
ilist<Node> List;
List.push_back(1);
// The single-element splice operation supports noops.
List.splice(List.begin(), List, List.begin());
EXPECT_EQ(1u, List.size());
EXPECT_EQ(1, List.front().Value);
EXPECT_TRUE(std::next(List.begin()) == List.end());
// Altenative noop. Move the first element behind itself.
List.push_back(2);
List.push_back(3);
List.splice(std::next(List.begin()), List, List.begin());
EXPECT_EQ(3u, List.size());
EXPECT_EQ(1, List.front().Value);
EXPECT_EQ(2, std::next(List.begin())->Value);
EXPECT_EQ(3, List.back().Value);
}
TEST(ilistTest, UnsafeClear) {
ilist<Node> List;
// Before even allocating a sentinel.
List.clearAndLeakNodesUnsafely();
EXPECT_EQ(0u, List.size());
// Empty list with sentinel.
ilist<Node>::iterator E = List.end();
List.clearAndLeakNodesUnsafely();
EXPECT_EQ(0u, List.size());
// The sentinel shouldn't change.
EXPECT_TRUE(E == List.end());
// List with contents.
List.push_back(1);
ASSERT_EQ(1u, List.size());
Node *N = List.begin();
EXPECT_EQ(1, N->Value);
List.clearAndLeakNodesUnsafely();
EXPECT_EQ(0u, List.size());
ASSERT_EQ(1, N->Value);
delete N;
// List is still functional.
List.push_back(5);
List.push_back(6);
ASSERT_EQ(2u, List.size());
EXPECT_EQ(5, List.front().Value);
EXPECT_EQ(6, List.back().Value);
}
}
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