llvm/unittests/ADT/IListSentinelTest.cpp
Duncan P. N. Exon Smith fd2abc5908 ADT: Separate some list manipulation API into ilist_base, NFC
Separate algorithms in iplist<T> that don't depend on T into ilist_base,
and unit test them.

While I was adding unit tests for these algorithms anyway, I also added
unit tests for ilist_node_base and ilist_sentinel<T>.

To make the algorithms and unit tests easier to write, I also did the
following minor changes as a drive-by:
- encapsulate Prev/Next in ilist_node_base to so that algorithms are
  easier to read, and
- update ilist_node_access API to take nodes by reference.

There should be no real functionality change here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279484 91177308-0d34-0410-b5e6-96231b3b80d8
2016-08-22 22:21:07 +00:00

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//===- unittests/ADT/IListSentinelTest.cpp - ilist_sentinel 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 "gtest/gtest.h"
using namespace llvm;
namespace {
class Node : public ilist_node<Node> {};
TEST(IListSentinelTest, DefaultConstructor) {
ilist_sentinel<Node> S;
EXPECT_EQ(&S, ilist_node_access::getPrev(S));
EXPECT_EQ(&S, ilist_node_access::getNext(S));
#ifdef LLVM_ENABLE_ABI_BREAKING_CHECKS
EXPECT_TRUE(S.isKnownSentinel());
#else
EXPECT_FALSE(S.isKnownSentinel());
#endif
}
TEST(IListSentinelTest, NormalNodeIsNotKnownSentinel) {
Node N;
EXPECT_EQ(nullptr, ilist_node_access::getPrev(N));
EXPECT_EQ(nullptr, ilist_node_access::getNext(N));
EXPECT_FALSE(N.isKnownSentinel());
}
} // end namespace